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Old Oct 10, 2006, 7:45 AM   #1
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i see a lot of 500mm mirror lenses on e-bay that are cheaper than the normal 500mm lens. Does the mirror lens get a good picture? What is a mirror lens?

Should I save up and get the sigma 170 - 500 or buy a mirror lens for wildlife.

Any help here would be great.
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Old Oct 10, 2006, 9:00 AM   #2
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A mirror lens is usually shorter in length. It has mirrors inside that reflect the incoming light several times before getting to the camera. If you have looked at the same lenses I have on ebay, they are manual focus and manual f stop (I think). It may be ok for what you want to do but I have the feeling it is not that great of a lens. I have a Sigma 170-500 and like it although it is used most for sports photography. The cost is higher but I feel it is a better lens. This is going to be a case of getting what you pay for, the better the glass the better lens.
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Old Oct 10, 2006, 9:34 AM   #3
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Since you mentioned you shoot sports. What would be a good zoom lens for indoors. I am thinking about the Sigma 28-105 2.8-4. What do you think.
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Old Oct 10, 2006, 10:15 AM   #4
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That may be an ok lens. If you can afford it look for a zoom which has a constant f-stop of 2.8 no matter what amount of zoom is used.
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Old Oct 10, 2006, 11:29 AM   #5
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Don't forget that most of those 500mm mirror lenses have a fixed f8 aperture, you change aperture by inserting ND filters at the camera end. You can forget trying to use them handheld or in anything but high noon sunlight.
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Old Oct 10, 2006, 12:35 PM   #6
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RP33 wrote:
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What would be a good zoom lens for indoors. I am thinking about the Sigma 28-105 2.8-4. What do you think.
A good lens for indoors depends on what you plan on shooting indoors and where. These will drive the focal lengths you need as well as aperture requiremments - for instance, if you like to take party or club shots the 28mm might not be wide enough. If you plan on taking photos of little Suzie's dance recital the 105mm might not be long enough. And, of course, if you plan on taking sports shots 2.8 may not be fast enough - in which case you need to use prime lenses.
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