Thanks for the observation! are you getting these results with a D800/E?
You might be right about the fixturing, though its pretty rigid/well damped (or so I thought since I get tack sharp images on the same rig with a 5DII/tamron180mm - the
mirror lockup makes no visible difference to that combo under studio flash)
Best,
rkg
(Richard George)
Jan 14, 2013 at 01:38 AM
Andre Labonte Offline • • • • • • Upload & Sell: Off
In case anybody's still following this, I got ahold of a Sigma 150mm non-os - MUCH better - here's some 100% crops from a test at f/8 and f/5.6 (I included 100% crop from a 5DMKII with the tamron 180 positioned to roughly the same field of view just for comparison) - note that none of these have had any sharpening done to them outside of whatever ACR does by default.
I have a Sigma 150 non-OS. My subjective impression is it's the sharpest lens I have. But the only complaint I have about the optics of any of my macro lenses is the tendency of the Sigma 50mm to flare at close range when I use flash.
As I use my lenses handling is more important than the last few lines per millimeter. I replaced a worn out Tamron 90 with the optically inferior but tougher Nikkor 105 AF-S. My Tamron 180 is tough (internal focus) but the Sigma 150 has full time focus override and faster focus, and that's normally worth more than 20% more focal length.
