dalegaspi wrote:
I have the Vietnam 150-400 and the 300/4 and in my controlled tests, the only time that it's "softer" than the 300/4 @ f4.5 is at far distances when looking at LR pixel peeping 300% where the zoom has a little veiling.
The only other difference i can see is that they have slight difference in color rendering even with corrected white balance (the zoom is more neutral) and the prime has slight higher magnification at closer distances than the zoom @ 300mm.
Photo shot below is tripod for both lenses on OM-1 Mark II with flash (to negate any form of shake). Original size can be downloaded at Flickr.
HicHic wrote:
Have you tested yours for decentering? Comparing corner sharpness on a flat test shot.
i have not ..only because for long lenses checking for decentering is hard to get right in my experience..and also i have little interest in doing such tests because with the way i use these lenses corner sharpness does not matter much.
