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Thread: camera lens bokeh discussion.
03-12-2007, 06:11 AM #1
Certain lens designs are famous for their good bokeh (out-of-focus background). The Zeiss Sonnar and the Leitz Summilux rangefinder lenses are legendary in this area. Even a 50 year old Sonnar lens (rangefinder type) can produce better bokeh than a modern top quality Canon or Nikon lens.
03-12-2007, 10:46 PM #2Originally Posted by Neil Nicholls
03-13-2007, 02:57 AM #3Originally Posted by taneepak
do you mean caused by the diaphragm in the lens or something in the camera?
Last edited by Neil Nicholls; 03-13-2007 at 03:03 AM.
03-13-2007, 11:22 AM #4Originally Posted by Neil Nicholls
besides, the photo was shot wide open at f/1.4. when wide open, the aperture is round. it is only shaped when stopped down.
03-13-2007, 11:38 AM #5
Have to confess I have the same difficulty as Neil. Pentagon means five sided. There are some blurry bits in the top left quadrant which "with the eye of faith" might look something like five sides - possibly..? Other than that the only other five sided objects I can see might be the petals on the flower.
Perhaps for 95% of the population, the bokeh is good enough. There are some people who can really discern the details for whom it would make a difference.
I'm glad not to have tried those classic lenses because they would be just wasted on me.
03-13-2007, 11:43 AM #6Originally Posted by red00ecstrat
yeah. i love this watch. very reliable and the design is simple and effective. i hope it will last for another 10, 20 yrs.
03-13-2007, 12:34 PM #7
there are 7 blades in that f/1.4 lens also
03-13-2007, 09:16 PM #8Originally Posted by Neil Nicholls
Look at the whitish background out-of-focus small 'flowers' at the bottom. They have an outline that is shaped a bit like a pentagon or maybe 6 to 8 sided aperture diaphragm blades. A good shape would have no outline, roundish and softly fading away at the edges. The one at the top behind the left flower also can be improved.
03-13-2007, 10:00 PM #9
03-14-2007, 02:35 AM #10Originally Posted by taneepak
But is that just because there are no other things near the subject. The background is a long way back from the subject, and so is very out-of-focus.
still don't really see what you mean in my photo.
Can you just download it, edit it in paint and stick some arrows in or something?
03-14-2007, 02:44 AM #11
did you mean here?
I'm not sure if that's just a coincidence or not.
03-14-2007, 02:52 AM #12Originally Posted by Neil Nicholls
I am not too good with the computer and will have to get someone to point out-you mean inserting pointers and arrows?-to me or teach me how to highlight the points of light at the back that are more pentagon than round.
03-14-2007, 02:58 AM #13Originally Posted by Neil Nicholls
03-14-2007, 05:47 AM #14Originally Posted by taneepak
firstly, i m pretty sure that bird picture wasn't shot with a 50mm lens! secondly, both shots were in different situation and with different background.
even if they were shot in the same situation with lenses with same focal length and same aperture. is there anything wrong with that "pentagon"? do you think it's too annoying somehow?
03-15-2007, 05:38 AM #15Originally Posted by Neil Nicholls
I haven't got any lenses with 5 blades.
03-15-2007, 05:40 AM #16Originally Posted by Neil Nicholls
03-15-2007, 05:47 AM #17
it remind me some interesting stuff! may by it's silly somehow.
if u cut a little star and stick it in fromt of your lens. then those "whatevertago" will become a star! of coz your can try that with different shape.
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