Apparently, the design of the Sigma allows inadventent disengagement
of the lens lock.
A "Bigma" did this.  Alot of good the Pentax water sealing did, you've
got to keep that lens attached!  Now I'm beginning to see why this

I am thinking about buying a Nikon Teleconverter for use with a D80 & Tamron
200-500mm and Nikon 70-210mm AIS lens. As I am using it on a DSLR do you go
for the 1.4 x instead of the 2X or doesn't it matter.
Thanks Bruce

When I bought my Rebel XT, I had problems with focussing properly. I was
told that this was due to the fact I had *all* AF points "alive", and that
the camera was mixing things up. This was discussed a few times in this
forum with the main advice being to keep the central AF ...

I just purchased the a100 a couple of days ago. My determining factor
was mainly that I already had a couple Minolta lenses and a flash. So
far, I am very pleased with the a100. I rarely take photographs above
ISO 800, so I don't worry about the noise. The picture quality is

I've put a short review of the lens on first acquaintance up today:
http://www.photoclubalpha.com/tamron18250/tamron18250.html
David

I have a Canon Rebel xt with 50mm f/1.8 & 200mm f/2.8 lenses. After a trip
to the Supercross races last night, I found that the 200mm is a bit too long
for that type of event. Any suggestions on a zoom to compliment what I
already have? TIA

This may be a weakness of the camera, but since this will be my first
DSLR, coming from a Canon A640 I'm curious how relative it is to my
own indoor dealings with auto focus.    It's obviously a great camera,
and if the low light auto focus criticism is relative to other DSLRs

Saint John of The Cross says, "The Heavenly Father will always give
hope and strength that is necessary to support sound belief in every
fact of belief and/or understanding of Divine Will. Remember this."
REVELATION DELIVERED THROUGH FRANCES M. KLUG

I see on many photography sites some really great effects, one in particular
is the white background? How is this acheived.  Is it done in photoshop, in
camera, or other?  I have the Nikon D80.
Seems to be that the subject is completely cropped out and just a white

Nikon service only uses new parts and they don't have the one for my
lens.  It's a Helicoid model 1B060-696.  I am in new york, actually
long island, for the week and then off to DC for a while.  Anybody
know a reputable shop that will have this part on their shelfs in

I have a NIkon d80 SLR and my husband has a bunch of old lenses he used to
use for his olympus ompc.  But these are generic lenses so he had to use a
lens mount adapter.  This adapter does not fit on the D80, but is there a
lens mount adapter that I can use for the D80 so I can ...

From KR review of D40x
http://www.kenrockwell.com/nikon/d40x.htm
ISO 100 - 3,200. Per the laws of physics, a 10MP sensor has to run at lower
ISOs for the same performance as a 6MP sensor of the same physical size.

The 18-70 is a terrific lens for a kit lens.  Ample sharpness,
contrast, etc. Good control of CA.
High distortion and noticeable vignetting but that at least is
correctable.  Now, is the 18-135mm really inferior to this lens?