« on: September 13, 2012, 02:04:30 AM »
Not even corner detail, but side detail around the middle of the frame, even extending significantly in from the edge, can be soft all the way to f/11... and on some copies not even clear up by f/11 (at which point diffraction softens the image).
The Novoflex is (sadly) worth the money. The aperture control is that blue dial you see. It has quite a bit of friction, since I didn't remove the rubber seal on the 14-24. No, no detents, but there are some indicators that generally tell you where ~f/4, f/11, & f/22 are. Or something like that. I can't remember... I calibrated it once. I just guess; I don't need much precision... I usually want to just shoot it wide open, or at ~f/8-f/11, or higher if I want gorgeous sunstars (which I can easily see via Live View, which you have to use to focus the lens anyway).
I wouldn't use this lens for event photography though, for obvious reasons!
Thanks for the info on the Novoflex adapter. I may consider it if for the future.
my 17-40 is a decent copy altho has a bit softer R side on the borders/edge when opened up.
at the wide end it cleans up quickly above f/8 but you only have until about /16 before diffraction softening starts to show up too.
Still, overall a disappointing lens on FF unless the only thing with textural detail is in the middle 2/3s of the frame.
It's time for an update on that old thing.
I was hoping the Tokina 17-35mm would be better. Haven't seen any detailed tests yet so not about to order one since it's not much cheaper.
Then again, there is Nikon's 17-35mm f/2.8 - certainly a little better in border-corner performance than the 17-40mm. Their slower 16-35mm VR is also a bit better.
I've got a chance to buy a nice 17-35 so need to do some chart-checkin.'
Would sure like a new 16-35 or 16-40 f/4 that performs well in the corners - for either mount.