john_robinson2

Just an after thought. Take more pictures of different subject with the same lens. I'll bet that "bulls eye" shows up in exactly the same place. It will be more pronounced at higher f numbers with lighter subject matter!

Just dirt !

Cheers

JR

Sorry chap your problem is nothing more complex that a spec of dirt on the CCD of your camera. I get this all the time. I change lenses a lot.

I use a spec grabber to remove the dirt! Hope this helps.

Nice photos by the way.

Cheers

I used to have a Yashica AF230 (10 years ago). One of the wonderful

things it had was focus-trap-triggering (You could focus the lens,

then anything that came into focus automatically triggered the

shutter) Is this possible on EOS3 camera... Big thanks !!

Im looking at buying either the 17-35mm Sigma or the more expensive

20-40mm Sigma for the EOS3. The 20-40 has a constant f2.8. The 17-35

is wider and £100 cheaper. Why would anyone go for the more expensive

option. Surely 17mm is the bonus. 35mm at f4 aint great, but with

these lenses (and my intended use) f16 or f32 is going to be the

setting most of the time (dof) Would anyone suggest one over the

other??? Thanks for your attention.