I think I'm getting closer to unravel the mysteries around testing this lens.
If you haven't followed my review thread here
: It is exceptionally hard to get consistent images for testing sharpness of this lens, but finally a pattern seems to emerge when testing at 400mm:
- fine IQ on a tripod
with mirror up. So optically the lens seems
to be not too shabby, but I normally don't carry a tripod with me
When handheld you have to distinguish:
- handheld with OS="off"
: You see the normal distribution of images lost to shake. But when you hit the moment of calm between two swings you can produce very good images too. Just like from the tripod
- handheld with OS="on"
is a different story: the OS eliminates most of the total lossed, BUT: it also seems
to limit the number of critically sharp shots you can get. It looks like the OS is quite "hectic" at times producing some erratic movements when disturbed. Not sure how the OS reacts, when the mirror-slap excites the system. It might
just be that the OS introduces "micro-blur" of it's own. That would also coincide with some observations of "mushy" images, because the micro-blur would smear colors and contrast.
Disclaimer: You have seen the "seems
" and "might
" above. Don't base any decisions on this post yet! My testing still has some questionable factors, so I have to repeat it
I'll post anything more qualified in the review-thread!
Hope to be back soon...
Thomas (beware: Nikon-fanboy and moderator!) My Lens Reviews
, My Pictures
, My Photography Blog