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Canon mirror (catadioptric) lenses for mirrorless RF?
#13
All I know is that I had a lot of fun with my Tamron SP 500 f/8!  In fact, I still own it.  When I bought it I originally had the Canon Rebel XTi (10 MP).  It's biggest downfall to me was not the bokeh or the contrast.  Certainly not the sharpness!  It was as Dave mentioned, really not a flaw, but a strength that caused some problems.  The lens was so small and light that one would use it without a tripod, and then blame the lens because there was motion blur.  I have been shooting birds as my main subject for about two years, but shots like the following one (if I can upload it, my internet is really shaky now).  That took me in that direction.  I honestly had no idea that this bird existed locally, and in [Image: z]

I guess I am doing it wrong!

I used the insert photo button and entered the URL for the Flickr page with the size as small as 640x360 px.

Is there a way to do this for a slightly internet challenged person?  I could just print the link, but I'm not sure if there are rules about doing that.

Also, Canon does have the 600mm and 800mm F/11.  That isn't really in the same league as the the F/stops on these new mirror lenses.  I do remember an article by Bob Atkins where he compared his Canon 500mm f/4L to the Tamron SP 500 f/8.  Bob did of course say he could not recommend any mirror lens due to the bokeh mainly.  He did however mention that color abberations were practically non-existant, and he admitted that much to his surprise the SP 500 was at least as sharp as the EF 500 f/4L.

I'm totally out of my depth here, but with new super-IS, and extremely high megapixel count it may well be that ultimate sharpness may outweigh a contrast issue, that may or may not even be that bad to start with.

That said, I used this lens only on 10, 15, and 20 MP sensors.  When you are talking about a type of lens that can do things other lenses cannot, it may be pretty smart to see what enhancements the new cameras have that can minimize their weakness.  My SP 500, I believe is over 40 years old.  I'd love to mount it on a camera that his good IBIS!

-Mac


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RE: Canon mirror (catadioptric) lenses for mirrorless RF? - by Arthur Macmillan - 06-14-2021, 09:09 AM

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