SIG vs Tok vs TAM
Okay ... 20mm showdown at 1-foot (minimum focusing distance for the Tokina AF 20-35mm f/3.5-4.5)
Okay ... all lenses set to an indicated 20mm, aperture set to f/5.6 and the lens swapped on a tripod mounted α700. Each lens was autofocused, several times, to remove any doubt.
Ready ... GO!
Tokina 20-35mm (age before beauty) 100% crop
SIGMA 10-20mm (our competing entry) 100% crop
TAMRON 17-50mm (staunch performer) 100% crop
Well, it's pretty clear that at 20mm, the SIGMA slightly outperformed the Tokina ... the image just looks better, clearer. The TAMRON ... as you can see ... just ran away with it. <Shrug> I know what I'm using for a 20mm shot. That contest is a no-brainer.
I guess, to be honest, I expected just a little better performance out of the SIGMA, especially at the "far end." I mean, this was the Tokina's "widest-end", so what can you expect? TACK SHARP ... it ain't.
Still have yet to do distortion. Now, where are those goal posts?
Last edited by DonSchap; 01-23-2008 at 08:31 PM.
- BFA, Digital Photography
A Photographer Is Forever
Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.