Hi Bob, unfortunately I didn't make any documentation (taken foto etc) during the conversion last year. Where bokeh is concerned some will be better than others. These are all nice lenses for selective focus applications. I have used this lens successfully for portraits but you have to be careful about the background. I used it for some close-ups with a Nikkormat in bright light.
#SWIRLY BOKEH LENS CANON SERIES#
One of my 135/2.3 Vivitar Series 1 lenses in in Nikon AI mount. A lens like a 200/4 or a 300/5.6 is hard to judge bokeh with because the it isn't fast enough to separate the subject from the background well. Which lenses have poor bokeh? I don't like the 50/1.8 New FD or any of the 135/3.5 Canon lenses after the chrome front model. I think the 35/2 FD SSC (concave front element) and the 28/2 FD SSC both have nice bokeh. If you get close enough to a subject with a wide angle there can still be some bokeh effects to look for. It isn't as sharp wide open or at f/2 as a 50/1.4 Canon FD SSC or even a 50/1.4 FL (2nd version) but it has a nice look. In my FL collection have a 55/1.2 lens which has nice bokeh. To my eye the 100/2.8 Canon FD, FD SSC and New FD are somewhat sharper wide open than the older or newer 105/2.5 Nikkors but their bokeh wide open isn't as nice. I think I prefer the bokeh of the 135/2.8 'K' Nikkor to that of the 135/2.5 FD. The 135/2.8 Nikkor Q, QC and 'K' lenses also have very nice bokeh. Both the older and newer 105/2.5 Nikkors have very nice boken at or near wide open. Some of my favorite portrait length lenses for bokeh are Nikkors. These are usually Nikon or M42 mount lenses. I ave plenty of Canon FD and Canon FD mount lenses but I sometimes use other lenses on Canon cameras with adapters.
A fast lens, when used wide open, can give a good selective focus effect but can still have poor bokeh. The worst bokeh is often seen when the background is close to the main subject. One of the reasons bokeh is so tricky is that the background in a portrait may be as close as a few inches away or as far away as the sky.
The number of blades alone will not determine the character of the out of focus areas but it can influence the look. One of the medium telephoto FD lenses which has nice bokeh is the 135/3.5 FD chrome front. The wider you go the more this is the case. With wide angle lenses even closing down a little can give you so much depth of field that the background will not be very blurred.
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