On Wed, 02 May 2001 20:47:34 +0200, you wrote:
>"Kotsinadelis, Peter (Peter)" wrote:
>>
>> One last comment, if you look at some of the examples of bad bokeh note the
>> jagged lines follow the shape of the aperture. A more hexagonal shape
>> produces less smooth out of focus areas than a rounder aperture. Bottom
>> line is that one should buy good lenses with round apertures.
>>
>
>Shape (or number of blades) of the aperture is only part of the game.
>I sure don't buy my lenses because of good bokeh, but I occasionally
>notice it in my pictures.
>
>E.g. if I compare the 200/2.8 L and 80-200/2.8 L at 200mm.
>Both lenses have 8 aperture blades, the shape of the aperture should
>therefor be similar. Nevertheless, the 80-200 renders out of focus
>highlights not as smooth as the prime. The difference is, that the
>circls of confusion are more evenly illuminated with the prime, while
>the zoom is quite uneven, if my memory serves me right it's even a
>little darker in the center than at the edges. Last year I have taken
>one frame with it, where it really jumped out on me and where I thought:
>Ouch! This would have come out much better with the 200/2.8 prime.
>Ok, no big deal, I have taken a lot of pictures with it where it really
>shines, so I certainly don't think about getting rid of it because of
>"bad bokeh". Its sharpness and contrast is quite good, that's what
>counts the most for me too.
This is interesting. I have a shot that I really like for the
background - but it was taken with a "consumer zoom" - the newish EF
28-90. I like the effect, but it *may* be "bad bokeh." I'd
appreciate it if someone with a more expreienced eye would have a look
at it and tell me what they think of the "bokeh" of this inexpensive
lens. The circles of confusion look quite evenly illuminated to me,
but they're rather stark, which in this picture I like. It's the
flower in Gallery 2 on my site below. This was shot wide open, which
for this lens is only f/4. If that's "bad bokeh" go ahead and tell
me. I have no delusions about this lens!
Ken Durling
Website http://home.earthlink.net/~kdurling/
Alternate e-mail: [EMAIL PROTECTED]
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