Where Sigma's glass was usually quite good but build quality a little suspect, I've always been impressed by Tokina lens build quality. I'm sure in pre digi days Tokina produced a lens which was also optionally available with a few cosmetic alterations and a Nikon badge?! (for a little more money too?) ..one or two of Tokina's optics didn't receive a totally positive press, but the 10-16mm is certainly part of Tokina's new generation of glassware. I've heard nothing but strong praise for it's quality/versatility.
Sigma 10-20mm used on full frame (FX) format bodies...how bad is the vignette/key hole effect?
I use a 15-30mm Sigma, which at 15mm isn't exactly a very wide on cropped (DX) sensors, but when fitted to full frame film body (F5) it is seriuosly wide, but of course I then don't have the convenience (or control) of the digi capture. (the first time I've ever admitted that one I think!)
Not that I can justify it at the mo, but that leaves two options open to me for those wider shots. Get an full frame (FX) digi body to fully utilise the 15mm, or get a wider than 15mm focal length lens. Both answer the solutions of a wide view, but picture perspective massively different.
Ideally wouldn't it be lovely to have a 8-24mm full frame lens!!
I'm kind of leaning toward a super-wide/ semi fish-eye option that can be used on both formats.
Ideally I wouldn't want DX format only lenses in my kit bag, just in case I do use film, or get a D700 or D3 one day!
Anyone any further thoughts on this hypathetical dilema?