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Old Feb 3, 2010, 7:49 PM   #1
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Default Mirror lens for Eos

What are your thoughts about mirror lenses with 500mm range. I was surfing and saw that they are on sale at a very reasonable price. Would it be worth getting one to play with?
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Old Feb 3, 2010, 7:52 PM   #2
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i think it would be too difficult to manually focus to be worth the trouble.

the sony 500mm AF on the sony alphas would be about the only mirror i would even be interested in, if i shot sony.
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Old Feb 3, 2010, 7:54 PM   #3
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Thanks, for the imput.
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Old Feb 3, 2010, 8:03 PM   #4
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Catadioptric (mirror) lenses are small, light, inexpensive, have few polished surfaces so they are very sharp, and have little chromatic aberration because the design doesn't include much refracting.

If you can pre-focus or rely on the depth of field to get your subject in focus, anything else nearly as good will be very big, very heavy, and very expensive.
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Old Feb 3, 2010, 8:07 PM   #5
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Thanks Tcav,

In my frankfurt home I live by the airport, and one of the glide paths has a really great vantage point for take offs and landing. It is very popular with the local photographers to hang out at on a nice day.

I was considering the mirror lens, or a 2x tc from canon to play around with photos of the aircrafts taking off and landing.

Not sure I am going to do it, but I was fiddling with the idea.

Much appreciated your input.
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Old Feb 3, 2010, 8:23 PM   #6
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Even if you have a very good lens, even a very good 2X TC will degrade image quality.

Since the path the aircraft take is certain, I think a catadioptric lens would be made to order for what you want to do.
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Old Feb 3, 2010, 8:25 PM   #7
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yes, that would negate any of the downsides of having to MF, it would actually work good for that purpose.
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Old Feb 3, 2010, 8:26 PM   #8
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The only real downside to a catadioptric lens (aside from the manual focus part) is the goofy bokeh, but for what you want to do, that won't enter the picture (so to speak.)
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Old Feb 3, 2010, 8:29 PM   #9
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Thanks guys for the input. 80 bucks does not seem to much to spend on an experiment.
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Old Feb 3, 2010, 8:31 PM   #10
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Quote:
Originally Posted by shoturtle View Post
Thanks guys for the input. 80 bucks does not seem to much to spend on an experiment.
80 bucks? I may have spoken too soon. 80 bucks?

What are you looking at?
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