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Photo Forum / Digital Photography / DSLR Cameras / December 2007

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Sony Alpha A-100 - Quality?????

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infiniteMPG - 29 Nov 2007 22:08 GMT
I recently purchased a Sony Alpha A-100 DSLR camera and just learning
the ins and outs.  I have the following lenses with my old Minolta
Maxxum 9000 that I have been using with it.

Phoenix 1:4.0-6.3  28-300mm   77mm face thread
Minolta AF 28-80  1:3.5(22) - 5.6 D   55mm face thread
Vivitar 500mm f/8 1:2.7 x Macro Focusing  72mm face thread

The main lens I have been using is the Phoenix as the zoom range is
good across the board.  I have had the camera a couple months and so
far I have been rather disappointed with the quality of the shots.  I
have used it indoors with the Minolta AF lens and those shots appear
much higher quality then the Phoenix but I got good shots with the
Phoenix with the 35mm Maxxum 9000.  The 500mm (and I have a doubler to
make it 1000mm) is just too much magnification even when using it on a
tripod.

I had a Konika Minolta Z3 that I had been using for years and got
crisp clear shots all the time and with the 10X optical and super
macro I had the whole range across the board.  I was thinking the
A-100 would improve the quality of my shots but so far it's not proven
itself to me.  Not sure if it's the lens, the settings or the operator
(I know a lot is the operator but he's learning).

On the automatic setting many of my shots are washed out so I learned
how to manually step down the aperture but on the small camera screen
it's hard to tell exactly the effect you had.  On the Z3 you could see
the captured image in the eyepiece and since ambient light was blocked
out you could get a good feel for what you just did.

But the main thing is the images do not appear very crisp, even when
taken in full sunlight.  And often the auto focus is not focused very
well at all.  I have been playing with the focus settings for spot,
etc, and ISO settings (using 100 for outdoor stuff) but still don't
see the quality I'd like.  Not sure if the lens, or maybe the filter,
might have something to do with it, too.

Any suggestions or hints would be greatly appreciated!!!!
Frank Arthur - 29 Nov 2007 22:54 GMT
>I recently purchased a Sony Alpha A-100 DSLR camera and just learning
> the ins and outs.  I have the following lenses with my old Minolta
[quoted text clipped - 45 lines]
>
> Any suggestions or hints would be greatly appreciated!!!!

One answer about the lenses is that a 28-300mm Canon lens is about
$2,200 and
a 28-300mm Phoenix lens is abou $200.  The Minolta is the only lens in
your collection that is in the same league as the Sony Alpha A-100.
Perhaps you should limit the extreme range of focal lengths and
concentrate on a high quality lens with a zoom range that you most
likely would be using. One that I know of that might be a steal is a
used Nikon 70-300AF ED lens which goes for under $200.
Frank Arthur - 29 Nov 2007 23:05 GMT
There is a brand new  MINOLTA AF 28-80MM 3.5-5.6 D LENS F/ SONY
ALPHA/MAXXUM

being offered at Ebay now at $5.50. I wonder how good it is?

>I recently purchased a Sony Alpha A-100 DSLR camera and just learning
> the ins and outs.  I have the following lenses with my old Minolta
[quoted text clipped - 45 lines]
>
> Any suggestions or hints would be greatly appreciated!!!!
acl - 29 Nov 2007 23:55 GMT
> I recently purchased a Sony Alpha A-100 DSLR camera and just learning
> the ins and outs.  I have the following lenses with my old Minolta
[quoted text clipped - 34 lines]
>
> Any suggestions or hints would be greatly appreciated!!!!

Hello,
It's hard to say like this. Could you possibly upload a couple of the
photographs that you don't like somewhere, and link to them? That's
way it's easier to work out an answer.
Mr. Strat - 30 Nov 2007 00:10 GMT
In article
<155b0be5-c068-46fa-b7c8-cb15bfde4649@a39g2000pre.googlegroups.com>,

> But the main thing is the images do not appear very crisp, even when
> taken in full sunlight.  And often the auto focus is not focused very
> well at all.  I have been playing with the focus settings for spot,
> etc, and ISO settings (using 100 for outdoor stuff) but still don't
> see the quality I'd like.  Not sure if the lens, or maybe the filter,
> might have something to do with it, too.

I've never thought much of any Sony product. Their digital cameras use
oddball memory sticks and the quality just isn't there.
Frank Arthur - 30 Nov 2007 16:45 GMT
> In article
> <155b0be5-c068-46fa-b7c8-cb15bfde4649@a39g2000pre.googlegroups.com>,
[quoted text clipped - 12 lines]
> use
> oddball memory sticks and the quality just isn't there.

And Mr Strat's quality?
Mr. Strat - 30 Nov 2007 18:09 GMT
> And Mr Strat's quality?

My Canon is made far better than any camera Sony has ever made.
Frank Arthur - 30 Nov 2007 18:17 GMT
> In article <B6X3j.18490$mb.16808@bignews9.bellsouth.net>, Frank
> Arthur
[quoted text clipped - 3 lines]
>
> My Canon is made far better than any camera Sony has ever made.

Thus spake Strat!
Pboud - 30 Nov 2007 18:18 GMT
>> In article <B6X3j.18490$mb.16808@bignews9.bellsouth.net>, Frank
>> Arthur
[quoted text clipped - 4 lines]
>
> Thus spake Strat!

in his humble, non subjective opinion..

:)
infiniteMPG - 30 Nov 2007 18:52 GMT
> >>> And Mr Strat's quality?
> >> My Canon is made far better than any camera Sony has ever made.
> > Thus spake Strat!
> in his humble, non subjective opinion..

Actually my Konika-Minolta Z3 fell off my kayak and sunk to the bottom
of the Manatee River (not in anything, just splashed in), fell out of
my pack on my mountain bike down a trail, was dropped out of my
unclosed backpack and bounced (in pieces) across my concrete driveway,
is held together with JB Weld, Superglue, a piece of a paper clip, and
a cut section of bicycle tire tube (holding the battery case shut) and
it still takes good pictures.  But none of that helps me take better
pictures with my A-100  :O)
Mr. Strat - 30 Nov 2007 19:52 GMT
In article
<4ad2712e-f55b-49a5-9879-e8d24737abfc@b40g2000prf.googlegroups.com>,

> Actually my Konika-Minolta Z3 fell off my kayak and sunk to the bottom
> of the Manatee River (not in anything, just splashed in), fell out of
[quoted text clipped - 4 lines]
> it still takes good pictures.  But none of that helps me take better
> pictures with my A-100  :O)

I don't believe I specified a model number. I use a DSLR.

You'd have been best off leaving the Konica at the bottom of the river.
infiniteMPG - 30 Nov 2007 22:01 GMT
> You'd have been best off leaving the Konica at the bottom of the river.

The dried out patched together dinky Z3 has won me a state photo
contests here and in NC, been published in several magazines, map
cover images for printing companies, newpaper front pages and a few
other things, and considering I'm a total hack just dragging the thing
along on hiking/kayaking trips between engineering jobs, I'm
satisfied  :O)   Some of us make do with what we have and photography
as an art is as much, if not more, in the eye and the imagination of
the photographer as the equipment he or she uses.
Mr. Strat - 30 Nov 2007 19:52 GMT
> > My Canon is made far better than any camera Sony has ever made.
>
> Thus spake Strat!

Feel free to buy a Sony digital camera, and then tell your friends that
you have pro-level gear. They probably won't know that you're talking
out of your a.s.
not@applicable.com - 01 Dec 2007 02:31 GMT
> Their digital cameras use
>oddball memory sticks

No, they use CF cards... You don't know too much...

>and the quality just isn't there.

Ya like you would know!!!

Nikon uses Sony sensors !

The new Sony 700 beats any Canon...

That makes Canon #3 or less...
David Kilpatrick - 30 Nov 2007 01:33 GMT
> Any suggestions or hints would be greatly appreciated!!!!

Ignore the trollery about oddball memory (as you know, it takes CF
cards) etc. The A100 is capable of slaughtering the Z3 in image quality,
but not with a cheap pre-digital Phoenix superzoom 28-300mm. Even Sigma
had to redesign their entire range for digital, improving the coatings
and enhancing contrast and resolution, in the DG and DC series lenses.
The Phoenix is a film-era dinosaur; the results looked good because film
is such a vague and tolerant medium, and you don't examine the pictures
as closely. Digital is critical - anything poor is shown up immediately
- and you look at the images as if they were all 20 x 16 prints.

First of all, get a single decent lens - even your Minolta 28-80mm is
pre-digital, and one of the cheapest kit lenses they made, if not bad on
film. The Konica Minolta 18-70mm or the new Sony 18-70mm (both can be
found for under $100 used, or even new) makes a much better matched
standard zoom.

However, there is one lens which will make this camera sing - the Tamron
18-250mm f3.5-6.3. It's not quite 300mm, but it is long enough, and the
optical quality is a quantum leap ahead of earlier 18-200mm/28-300mm etc
designs. It can be obtained for about $400 (I think - it is £299 in the
UK) and while that sounds a lot, you end up with one lens which will do
pretty much everything you will ever need, and do it much better than it
deserves to.

Go into the camera menus and set VIVID sRGB for your JPEG style. Use the
DEC menu to set +2 sharpness instead of the default of 0, if you want
the images to look more like the Z3. To really see what the camera can
do, try shooting RAW and buy a copy of Photoshop Elements 5.0PC/4.0Mac
or later which will give you very fast conversion of the raw files - or
load up the Sony software, which is good for colour quality, but a bit
slow and with a poor user interface.

David
infiniteMPG - 30 Nov 2007 18:23 GMT
Thanks for all the great info, and we all have differring tastes so
not expecting everyone to have the same opinion.  Many thanks to David
for the massive detailed information. We'd heading up to a state park
this weekend and the weather should be great so it will be a good
chance to try some new settings.  Yeah, west central Florida, weekend,
mostly sunny, no chance of rain, high in the lower 80's.  Good
shootin' weather  :O)

I actually thought the Minolta was a post digital lens but I have been
wrong with other things. I was looking at some lenses that were
Minolta's around 18-200 (or something around that) as I really like
the close focal range but seeing as they are "Minolta" they were
probably pre-digital.  I'll search around for the Tamron and see what
I can find.  I am willing to get a decent lens and if the broader the
range the better.  Probably post what I find in here as it sounds like
a lot of experience is floating around.  I will probably pick up some
macro extension tubes, too, as I really like close-up macro shots and
that way I can haul them around with worry as they don't have glass.
And AF doesn't do too good with close macro work and that's fine with
me.  Is there any issues with dust or debris getting in the body when
changing lenses in the field?  I took some shots last weekend and had
a smudge spot on the same place on all the images.  Wasn't on the
lense so I gently blew dusting air towards the camera without a lense
on and snapped the shutter.  The spot was gone... whew!  Only had this
a couple months so hopefully not in need of a cleaning yet.

What is the file size difference between RAW and the JPEG?  Not
worried about the conversion process but does a RAW converted toi JPEG
on a PC have better quality then starting with a JPEG on the camera?
I only have a 2Gb card right now but I can see a need for more
memory.  Got a nice little Toughbook laptop and a 720Gb USB drive so I
can offload the images on the road.  I'll play with the setting this
weekend but it gets tough when my GF is wanting to hike on and I find
a good shot and start fiddling with the settings.  We usually
compromise  :O)

I do have examples of my Z3 work at http://www.infinitempg.com/pix and
getting up to speed with the A-100 is something pretty high up on my
hit list.

Thanks to everyone for the info.
Scott
David Kilpatrick - 30 Nov 2007 01:34 GMT
And while you are at it, visit

www.photoclubalpha.com

and read a few of the articles on the A100, and see some of the pix.
Also try visiting

www.dyxum.com

which is a community very much able to show you what the A100 can do.

David
infiniteMPG - 30 Nov 2007 18:31 GMT
GREAT SITES!!!!   I can see I won't be getting much work done this
afternoon....  :O)

THANKS!

> And while you are at it, visit www.photoclubalpha.com
> and read a few of the articles on the A100, and see some of the pix.
> Also try visiting www.dyxum.com
> which is a community very much able to show you what the A100 can do.
Bob@pbasephotos.net - 30 Nov 2007 02:06 GMT
>I recently purchased a Sony Alpha A-100 DSLR camera and just learning
>the ins and outs.  I have the following lenses with my old Minolta
[quoted text clipped - 34 lines]
>
>Any suggestions or hints would be greatly appreciated!!!!

First of all - you need a good lens to get good shots... I think some of your
lenses should be junked... get something good that will suit your needs. I use
mostly the 18-200 Sony lens, but I plan to get a good 24mm 1.8 some day... will
cost more than the camera!

Next... use RAW pictures with this camera, the jpegs tend to suck... see my site
here:

http://www.pbase.com/flintstonestudio/sony

And over here you will see how the camera functions as a "snapshot device"...

http://www.pbase.com/flintstonestudio/railway_maintenance

Since I was kind of working at the time, I could only use the camera in P-auto
mode.

Note I am also only learning to use this camera, but I am quite happy with it.
One thing I do know - TRY other settings! Sometimes the logical setting is not
the best!

Bob
infiniteMPG - 30 Nov 2007 18:36 GMT
> First of all - you need a good lens to get good shots... I think some of your lenses should be junked... get something good that will suit your needs.

Agreed!  On my shopping list (and my Christmas list)

>>I use mostly the 18-200 Sony lens, but I plan to get a good 24mm 1.8 some day... will cost more than the camera!

Something in that 18-200/250 range I think is what I need.  Good
universal range.  What would you be using the 24mm 1.8 for and why so
pricey?

> Next... use RAW pictures with this camera, the jpegs tend to suck... see my site here:
> http://www.pbase.com/flintstonestudio/sony
>  And over here you will see how the camera functions as a "snapshot device"...
> http://www.pbase.com/flintstonestudio/railway_maintenance

Good shots even if for work.  Nice crisp and clear.  What do you use
to do the RAW-->JPEG conversion?

> Since I was kind of working at the time, I could only use the camera in P-auto mode.
> Note I am also only learning to use this camera, but I am quite happy with it.
> One thing I do know - TRY other settings! Sometimes the logical setting is not
> the best!

I am definitely just scratching the surface.  THANKS!!!!
Bob@home.com - 01 Dec 2007 02:22 GMT
>> First of all - you need a good lens to get good shots... I think some of your lenses should be junked... get something good that will suit your needs.
>
[quoted text clipped - 4 lines]
>Something in that 18-200/250 range I think is what I need.  Good
>universal range.

The 18-200 Sony is a good walking around lens, there is also a Sigma 28-300 you
could consider, only around $400 I think and a good "tourist" lens. (It's on
sale at Amazon).

>  What would you be using the 24mm 1.8 for and why so
>pricey?

The 24 becomes a 36 in the camera, a very useful wide angle lens, and it
probably will do macro focus as well. The 1.8 is to get very narrow depth of
field or lots of light or both... this will be a good lens for closeups and for
scenery.

Whenever you see a 'f' number of 1.8 or so, be prepared to open your wallet!

>> Next... use RAW pictures with this camera, the jpegs tend to suck... see my site here:
>> http://www.pbase.com/flintstonestudio/sony
[quoted text clipped - 3 lines]
>Good shots even if for work.  Nice crisp and clear.  What do you use
>to do the RAW-->JPEG conversion?

The Sony converter that comes with the camera is the best I've seen, better even
than Lightroom from Adobe that I tried.

>> Since I was kind of working at the time, I could only use the camera in P-auto mode.
>> Note I am also only learning to use this camera, but I am quite happy with it.
>> One thing I do know - TRY other settings! Sometimes the logical setting is not
>> the best!
>
>I am definitely just scratching the surface.  THANKS!!!!
infiniteMPG - 01 Dec 2007 04:04 GMT
Thanks for all the info and as usual, great data and very helpful.
Does anyone have any knowledge of how any of these lenses would work
wtih the A-100?

Sigma 28-200mm DL Hyperzoom Macro Lens

TAMRON 28-200mm LD IF

Tamron 28-200mm 1:3.5-5.6 Aspherical Element lens in Minolta AF mount

Sigma AF 28-300/3.5-6.3 ASPHERICAL IF DG MACRO F/MINOLTA MAXXUM (62MM)

And that explains nicely on the 1.8 and that would be a lens such as
the SIGMA Wide 28mm f/1.8 (D)EX Aspherical DG.  Would something like
that be good?  Still would like to snag a set of macro extension tubes
for really tight work.  Had a set with my old STR-201 (MD mount).  Can
find M42 to Sony AF extension tubes for $20 but straight Sony AF
extension tubes seem to be around $100.  The same set for Nikon is
$10.  Anyone have experience with the extension tubes and the A-100?

Thanks again, your help has been very valuable,
Scott
Bob@home.com - 02 Dec 2007 00:20 GMT
>Thanks for all the info and as usual, great data and very helpful.
>Does anyone have any knowledge of how any of these lenses would work
[quoted text clipped - 18 lines]
>Thanks again, your help has been very valuable,
>Scott

I have a Sigma 24 f1.8 that I used to use with my Nikon, but I sold the Nikon,
and may sell all of the other stuff as well, and stick with Sony...

I'm still thinking about it...

I am going downtown Monday or Tuesday to get the same lens for my Sony, it's
somewhere between $400 - $500...

It's a very sharp and capable lens, and doesn't have the distortion of a 20 that
is also for sale.
JG - 02 Dec 2007 12:30 GMT
I bought Sony's 18-200 lens when it was on half price offer. This is
basically a rebadged Tamron.

Having read the test report here
http://pics.dmm.co.jp/mono/movie/btyd014/btyd014pl.jpg
I wasn't expecting great things.

It's a SuperZoom and there are compromises but it's now a permanent fixture
and lets me leave the Kit Bag at Home.
Great for travel shots and action.
infiniteMPG - 02 Dec 2007 13:53 GMT
> I bought Sony's 18-200 lens when it was on half price offer. This is
> basically a rebadged Tamron.

Found some Tamron's that are 28-300 and thinking about that as the
higher zoom I like.  If you had the choice between an 18-200 or a
28-300 (both Tamron) which would you choose?
Tony Polson - 02 Dec 2007 14:00 GMT
>> I bought Sony's 18-200 lens when it was on half price offer. This is
>> basically a rebadged Tamron.
>
>Found some Tamron's that are 28-300 and thinking about that as the
>higher zoom I like.  If you had the choice between an 18-200 or a
>28-300 (both Tamron) which would you choose?

The 18-200 was designed for digital and is by all accounts a very good
performer.  For that reason it is probably a better choice than a
28-300mm.
infiniteMPG - 05 Dec 2007 20:35 GMT
> I bought Sony's 18-200 lens when it was on half price offer. This is basically a rebadged Tamron.

Any opinions comparing the Tamron 28-200mm 1:3.5-5.6 and a Tamron or
Sigma 28-300?  I like the idea of the 18-200 but would like a higher
magnification like the 28-300 and not sure what loss would occur
between the 28 and the 18???
David Kilpatrick - 05 Dec 2007 22:29 GMT
>>I bought Sony's 18-200 lens when it was on half price offer. This is basically a rebadged Tamron.
>
> Any opinions comparing the Tamron 28-200mm 1:3.5-5.6 and a Tamron or
> Sigma 28-300?  I like the idea of the 18-200 but would like a higher
> magnification like the 28-300 and not sure what loss would occur
> between the 28 and the 18???

The best one by far is the new 18-250mm - it is far better than the
18-200mm, whether in Sony or Tamron version. Sigma does not have an
equivalent.

Really, on APS-C it's so useful to have 18mm. It is the difference
between having a 28mm lens available, and being stuck with 42mm as your
shortest length.

David
infiniteMPG - 06 Dec 2007 17:44 GMT
Sounds like the Tamron (or remarked Sony) 18-250 f3.5/6.3 is the way
to go or maybe a good digitally optimized 28-300 (would go more then
300 if my pocketbook would support it) for our travels in the wild.
The 17-70 Sigma would be nice but if I got the 18-250 Tamron that
would pretty much cover that range (but the f2.8 of the Sigma would be
much better close up then the f3.5 of the Sony)

If I wanted to get closer (or higher magnification) then the Sigma
17-70, like to do macro portrait shots of bugs and stuff like that,
what would be my best bet?

And as always, many thanks to all of you for your helpful input.  As
impulsive as I can get with my checkbook in hand I have managed to
pull my pen back and investigate first.

Thanks again,
Scott
infiniteMPG - 06 Dec 2007 17:52 GMT
Just want to check descriptively, is this the lens we have been
talking about :

Tamron 18-250mm F/3.5-6.3 Di II LD Aspherical IF AF Lens

Thanks,
Scott
infiniteMPG - 06 Dec 2007 20:41 GMT
Saw a deal with a Sigma 28-80 F 3.5-5.6 Autofocus Zoom and a Sigma
70-300 F 4-5.6 Autofocus Zoom bundled together.  Heard some things
about a broad zoom lens loosing quality at one end or the other.
Would it be a good starting point to have these to 'learn' with and
then maybe step up to something like the 18-250 or the 28-300 and get
to just having one lens down the road when I know what I am doing
better?  I could land both these for less then 1/2 the cost of either
the 18-250 or the 28-300.
David Kilpatrick - 06 Dec 2007 22:46 GMT
> Saw a deal with a Sigma 28-80 F 3.5-5.6 Autofocus Zoom and a Sigma
> 70-300 F 4-5.6 Autofocus Zoom bundled together.  Heard some things
[quoted text clipped - 4 lines]
> better?  I could land both these for less then 1/2 the cost of either
> the 18-250 or the 28-300.

They are almost certainly not DG or DC lenses. They are old-type lenses
intended for cheap bundles with film cameras.

Trust what you hear - the 18-250mm will not be regretted. You identified
the right lens. It was designed for digital from the start, and only
works/covers with digital cameras (not film).

The Sigma 17-70mm does indeed go very close, but unfortunately it's not
that good for bugs. The lens ends up 2cm from the bug, casting a shadow
or disturbing it. The 18-250mm Tamron does the equivalent of 1:2.3
(relative to full frame stated repro ratios):

Here's their text -

3. Revolutionary Minimum Focusing Distance of 0.45m (17.7”) throughout
the Entire Zoom Range Affords a 1:3.5 Macro Capability
The new zoom lens achieves a minimum focus distance of 0.45m (17.7”)
throughout the entire zoom range, top of the class capability among high
power zoom lenses for digital SLR cameras, which results in a maximum
magnification ratio of 1:3.5 at the 250mm tele-end.(*4)
(*4) Since the APS-C sized imager is smaller than the 35mm format film,
the new zoom lens can fill the frame with almost the same scope (approx.
8 x 5.5cm) as a lens with a maximum magnification ratio of 1:2.3 on a
35mm film SLR camera.

If you buy a 62mm 2, 3 or 4 dioptre achromatic close up lens you will
maintin a reasonable working distance - still 10cm or so instead of the
extremely close quarters of the Sigma 17-70mm - and get excellent
close-ups. Also, with a close-up lens, you get the ability to autofocus
without any extra payload, and zoom if you want to reframe.

David

Signature

Icon Publications Ltd, Maxwell Place, Maxwell Lane, Kelso TD5 7BB
Company Registered in England No 2122711. Registered Office 12 Exchange
St, Retford, Notts DN22 6BL
VAT Reg No GB458101463
Trading as Icon Publications Ltd, Photoworld Club and Troubadour.uk.com
www.iconpublications.com - www.troubadour.uk.com - www.f2photo.co.uk -
www.photoclubalpha.com - www.minoltaclub.co.uk
Tel +44 1573 226032

infiniteMPG - 18 Dec 2007 02:36 GMT
> Trust what you hear - the 18-250mm will not be regretted. You identified
> the right lens. It was designed for digital from the start, and only
> works/covers with digital cameras (not film).

Still shopping for the Tamron 18-250.  Find it rather amuzing that the
same lens for a Nikon is $100 cheaper then it is for Sony/Minolta.
Well, not amusing, more like financially disappointing.  Yeah, on a
tight budget and just finished two major birthdays and still spitting
out the buck$ for Christmas and another two birthdays early in
January.  Not the best time of year to be trying to pull of another
purchase  ::sigh::

Thanks again for your help,
Scott
infiniteMPG - 21 Dec 2007 19:37 GMT
Just got the shipping firmed up, shopped around a looked at photo
galleries of people using the Tamron 18-250 and was very impressed.
So this afternoon I'm breaking down and ordering the Tamron 18-250 for
my A-100.  I guess I decided I needed to get myself a good Christmas
present, been a tough year.

Now the next step is to see what I can find to do really close macro
shots without knocking the bugs off the leaf with the lens  :O)

Wishing everyone a Merry Christmas and a great start to the New Year!
Scott
infiniteMPG - 29 Dec 2007 22:25 GMT
Got my Tamron 18-250 lens yesterday and although I have a ton of
learning to do, it's night and day apart from the pictures I was
getting with my old Maxxum lenses.  The quality is crisp, the focus
good, learning to use the shutter speed better for action shots.
Spent the whole day yesterday just traveling around the area finding
odds and ends to practice shooting.  Shot 165 pictures and was liking
what I am seeing so far!  Thanks again for all your assistance and I
appreciate all the input.

Thanks again and hope everyone had a great Christmas and has a good
start to the New Year!
Scott
infiniteMPG - 02 Dec 2007 13:52 GMT
> I have a Sigma 24 f1.8 that I used to use with my Nikon, but I sold the Nikon,
> and may sell all of the other stuff as well, and stick with Sony...
> It's a very sharp and capable lens, and doesn't have the distortion of a 20 that
> is also for sale.- Hide quoted text -

Wouldn't that be for closeup work like portraits?  The vast majority
of my work is out in parks and nature spots, hiking and dragging the
gear along.  A more universal zoom would probably be a better
selection as a fixed lens is limited when sometimes the subject is 10-
feet away, and sometimes 100-feet, and you don't have the reaction
time to change lenses or what you wanted to shoot is gone.
Bob@home.com - 03 Dec 2007 03:37 GMT
>> I have a Sigma 24 f1.8 that I used to use with my Nikon, but I sold the Nikon,
>> and may sell all of the other stuff as well, and stick with Sony...
>> It's a very sharp and capable lens, and doesn't have the distortion of a 20 that
>> is also for sale.- Hide quoted text -
>
>Wouldn't that be for closeup work like portraits?

OOOOOOOO you don't want to use a 24mm for portraits unless you don't like the
person!!   It will give them big noses!!   70mm is a portrait lens...

> The vast majority
>of my work is out in parks and nature spots, hiking and dragging the
>gear along.  A more universal zoom would probably be a better
>selection as a fixed lens is limited when sometimes the subject is 10-
>feet away, and sometimes 100-feet, and you don't have the reaction
>time to change lenses or what you wanted to shoot is gone.

You want a "tourist" lens... a super zoom, maybe a 28-300 or 50-500...

You only need wide angle for the panorama shots, you need to decide what
percentage you do wide or tele... You could go with 2 zooms, a 17-70 and a
28-300 or 50-500

I like the 28-300 more than the 18-200 if that helps you, for a "walking around"
lens. You can always stitch together wide shots to make them wider, but nothing
beats a long lens!

If you are wondering, I use the 24 for product shots... electronic equipment. It
can also get close with the macro feature.
David Kilpatrick - 02 Dec 2007 22:38 GMT
> Thanks for all the info and as usual, great data and very helpful.
> Does anyone have any knowledge of how any of these lenses would work
[quoted text clipped - 15 lines]
> extension tubes seem to be around $100.  The same set for Nikon is
> $10.  Anyone have experience with the extension tubes and the A-100?

Sigma DG is digially optimized. Remember - these lenses will all be
equal to 42-450mm on your A100. If you want a more versatile lens, try
to get the Tamron 18-250mm.

And don't get extension tubes. For one, they are very expensive; two,
they work badly with the zooms. Buy a suitable (62mm) 3 or 4 dioptre
achromatic close-up lens like the Sigma 2-element type. Be sure to stop
down well, to f11. The benefit of the close-up lens is that AF still
works perfectly (it does not with tubes), the aperture is not affected
for viewing, and the zoom still works (which it does not with tubes).

David
Bob@home.com - 03 Dec 2007 03:38 GMT
>> Thanks for all the info and as usual, great data and very helpful.
>> Does anyone have any knowledge of how any of these lenses would work
[quoted text clipped - 19 lines]
>equal to 42-450mm on your A100. If you want a more versatile lens, try
>to get the Tamron 18-250mm.

Didn't Sony just release a 18-250?

>And don't get extension tubes. For one, they are very expensive; two,
>they work badly with the zooms. Buy a suitable (62mm) 3 or 4 dioptre
[quoted text clipped - 4 lines]
>
>David
David Kilpatrick - 03 Dec 2007 10:39 GMT
>>>Thanks for all the info and as usual, great data and very helpful.
>>>Does anyone have any knowledge of how any of these lenses would work
[quoted text clipped - 21 lines]
>
> Didn't Sony just release a 18-250?

Yes, but budget appears to be an issue with the buyer, and the Tamron is
$100 cheaper. We use the Tamron :-)

David
RichA - 01 Dec 2007 04:58 GMT
> I recently purchased a Sony Alpha A-100 DSLR camera and just learning
> the ins and outs.  I have the following lenses with my old Minolta
[quoted text clipped - 18 lines]
> A-100 would improve the quality of my shots but so far it's not proven
> itself to me.

The Sony's tested resolution is among the highest of the current 10
megapixel  cameras.  Mostly because they didn't go mad with the moire
filter.  It's the lens that is the problem.  My advice (because I've
seen boxes of them for about $20-$30 each or less) is to buy a 50mm
f1.7 manual or AF Minolta of Ebay, wherever, put the thing on a tripod
and take some shots that way.  Try raw and JPEG and see what it's
like.
 
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