K K Hui wrote:
> Would like to hear direct experience from users on the optical
> performance of the EF400/2.8L II. I have one and find it a little bit
> soft when use wide open compared with my EF300/2.8L which is superb.
> With EF1.4x, the lens really needs be stopped down by one to two stops
> to get sharp images.
Sharpness is a matter for personal tastes, but I have never heard this
comment from anyone before and have not experienced it myself. In fact,
this very lens is reputed to be the world's very best at low f-stops due to
sharpness and bokeh (forgetting the new IS lens for a moment). Opinions may
vary.
I don't have a 1.4x, but I've never heard that the 1.4x reduces sharpness.
I do have the 2x converter and I can notice a definite reduction in
sharpness on both my 400 2.8 II and 70-200L. I've often wondered if I have
a sub-standard 2x (it's a recent Canon), but have also seen others noticing
the difference also.
I don't have a 300/2.8 for comparison--just never had a need. However, with
digital bodies coming on, that may change.
Hope this helps.
Dave B.
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