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Photo Forum / General Photo Topics / Australian Photography / May 2008

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Chopped OVF for Sony A350

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Focus - 28 May 2008 12:46 GMT
Sometime ago I read about the possibility to put a Nikon eye magnifying
glass in place of the Sony eyecup.
Yesterday I went to a store and tried the Nikon DK21M (M is important,
because without it, it's just an empty cup). It fits like a glove and the
view is very much improved, no if's, buts or maybe's about that.
BUT! I did like the original big eye cup of the Sony. So I started to chop
around and now I finished. Mind the fact that the whole thing stands a
little off from the camera, but for me that's not important.
I have a much better view and control.

Here's a picture of the two parts before I "trashed" them:
http://photos-of-portugal.com/Eye1.JPG

You have to take the rubber ring away from the Nikon, even they tell you it
can't be done. RIGHT!

Then you also have to do some trimming on the Sony cup to make it fit.
To keep the eye starter to work, you also need to trim a bit at the bottom
of the Nikon: just take some away, try if it work, take some away again,
etc.
http://photos-of-portugal.com/Eye2.JPG

There you go: perfect OVF with a 17% bigger view. Believe me: that's much!
Any questions: just ask.

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Focus

k - 28 May 2008 12:56 GMT
| Sometime ago I read about the possibility to put a Nikon eye magnifying
| glass in place of the Sony eyecup.
[quoted text clipped - 20 lines]
| There you go: perfect OVF with a 17% bigger view. Believe me: that's much!
| Any questions: just ask.

nice work :)
ASAAR - 28 May 2008 19:43 GMT
> Then you also have to do some trimming on the Sony cup to make it fit.
> To keep the eye starter to work, you also need to trim a bit at the bottom
[quoted text clipped - 4 lines]
> There you go: perfect OVF with a 17% bigger view. Believe me: that's much!
> Any questions: just ask.

 Nice job.  But as it will let in additional light from the rear,
putting the exposure off by as much as 0.7EV, it would have been
more useful on the Canon DSLR you recently returned . . .

 :)
Focus - 28 May 2008 20:11 GMT
>> Then you also have to do some trimming on the Sony cup to make it fit.
>> To keep the eye starter to work, you also need to trim a bit at the
[quoted text clipped - 10 lines]
> putting the exposure off by as much as 0.7EV, it would have been
> more useful on the Canon DSLR you recently returned . . .

LOL.
But additional? If anything it lets less light come in..

Signature

Focus

David Kilpatrick - 28 May 2008 22:34 GMT
>>> Then you also have to do some trimming on the Sony cup to make it fit.
>>> To keep the eye starter to work, you also need to trim a bit at the
[quoted text clipped - 12 lines]
> LOL.
> But additional? If anything it lets less light come in..

And on the A350 you can always just switch to live view, viewfinder
blind comes over and you get 1200-zone evaluative metering read from the
focus screen - with alarming accuracy.

David
Focus - 28 May 2008 22:39 GMT
>>>> Then you also have to do some trimming on the Sony cup to make it fit.
>>>> To keep the eye starter to work, you also need to trim a bit at the
[quoted text clipped - 19 lines]
>
> David

Can you elaborate on that? I don't quite understand.
Do you mean the metering in liveview is different than with the OVF?

And how is it alarming?

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Focus

David Kilpatrick - 29 May 2008 11:07 GMT
> "David Kilpatrick" <iconmags3@btconnect.com> wrote in message

>> And on the A350 you can always just switch to live view, viewfinder blind
>> comes over and you get 1200-zone evaluative metering read from the focus
[quoted text clipped - 6 lines]
>
> And how is it alarming?

Yes, in evaulative (matrix) mode only. In centre weighted and spot, you
get the normal system. In matrix mode, the CCD video sensor does the
metering instead, and of course you never get overexposure (it's like a
bridge camera metering in that respect) and there is therefore no need
for the camera to underexpose slightly, which the A350 tends to do with
regular metering just to make best use of dynamic range (9.2 stops at
ISO 100 according to Anders Uschold in the BJP yesterday).

With Live View Matrix metering, you get 1200 colour sensitive points and
the live view image perfectly matches the final output in terms of the
live histogram, as well. with LV metering there really is no need ever
to think about bracketing, it's like using the KM A2 (which I still use
occasionally).

David

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Focus - 29 May 2008 12:27 GMT
>> "David Kilpatrick" <iconmags3@btconnect.com> wrote in message
>
[quoted text clipped - 24 lines]
>
> David

Thanks for clearing that up. Now, of course: how does it differ from say,
Canon and Nikon LV? I assume they don't have that CCD video sensor, because
the mirror is locked up, right?

Signature

Focus

David Kilpatrick - 29 May 2008 15:09 GMT
> Thanks for clearing that up. Now, of course: how does it differ from say,
> Canon and Nikon LV? I assume they don't have that CCD video sensor, because
> the mirror is locked up, right?

They should take the exposure from the main sensor, though auto-gain can
influence that and I am unsure whether for example the Canon 450D really
does - as every shot always returns you to AF/mirror action.

I'm pretty sure the Nikon D300 and D3 get their exposure reading direct
from the sensor.

David

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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 -
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Chris Malcolm - 30 May 2008 09:21 GMT
In rec.photo.digital.slr-systems David Kilpatrick <iconmags3@btconnect.com> wrote:
>> "David Kilpatrick" <iconmags3@btconnect.com> wrote in message

>>> And on the A350 you can always just switch to live view, viewfinder blind
>>> comes over and you get 1200-zone evaluative metering read from the focus
[quoted text clipped - 6 lines]
>>
>> And how is it alarming?

> Yes, in evaulative (matrix) mode only. In centre weighted and spot, you
> get the normal system. In matrix mode, the CCD video sensor does the
[quoted text clipped - 3 lines]
> regular metering just to make best use of dynamic range (9.2 stops at
> ISO 100 according to Anders Uschold in the BJP yesterday).

> With Live View Matrix metering, you get 1200 colour sensitive points and
> the live view image perfectly matches the final output in terms of the
> live histogram, as well. with LV metering there really is no need ever
> to think about bracketing, it's like using the KM A2 (which I still use
> occasionally).

But surely even such comprehensive metering can only produce an
accurate exposure in cases where the image dynamic range is within the
dynamic range of the camera. Otherwise it's only going to get it right
if its algorithm takes the same decisions about what is the most
important detail to catch in this particular image as you do, e.g.,
blow out the highlights to catch all the shadow detail, or dump shadow
detail to preserve highlight detail, or only preserve highlight detail
up to the point of specular refletions, and so on.

I would have thought in those cases it could only get the exposure
"right" by good luck. So you would either do it it carefully manually
by examining the historgram, blown zebra stripes, etc., or do
bracketing to cover the range of uncertainty.

Signature

Chris Malcolm        cam@infirmatics.ed.ac.uk              DoD #205
IPAB,  Informatics,  JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
[http://www.dai.ed.ac.uk/homes/cam/]

Mr.T - 30 May 2008 09:34 GMT
> But surely even such comprehensive metering can only produce an
> accurate exposure in cases where the image dynamic range is within the
[quoted text clipped - 9 lines]
> by examining the historgram, blown zebra stripes, etc., or do
> bracketing to cover the range of uncertainty.

Surely if the contrast range is greater than the camera can handle, and you
want both shadow detail and highlight detail, you have no option than to
take multiple exposures and use some form of HDR (auto or manual)

Otherwise it MUST be up to the photographer to choose what he wants to
sacrifice. Of course you can let the camera do it if you don't give a rats
what it chooses.

MrT.
Alan Browne - 29 May 2008 00:33 GMT
> Then you also have to do some trimming on the Sony cup to make it fit.
> To keep the eye starter to work, you also need to trim a bit at the bottom
[quoted text clipped - 4 lines]
> There you go: perfect OVF with a 17% bigger view. Believe me: that's much!
> Any questions: just ask.

I admire your handiwork.  However, this is the nice thing with the
higher end Minolta's (Sony's): the viewfinder is brighter and has higher
contrast than the lower end models like the -350.

This mainly due to a prism instead of a mirror box.

Cheers,
Alan.

Signature

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David Kilpatrick - 29 May 2008 11:08 GMT
>> Then you also have to do some trimming on the Sony cup to make it fit.
>> To keep the eye starter to work, you also need to trim a bit at the
[quoted text clipped - 11 lines]
>
> This mainly due to a prism instead of a mirror box.

Of course you can also fit the magnifier to the higher end cameras - it
then produces a superb size of viewing image. I have the Olympus ME-53
magnifier which is 1.2X instead of the 1.17X for the Nikon, but it need
a lot more work to make it fit.

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

 
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