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Old Jul 30, 2010, 12:32 AM   #1
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Default Opteka 500mm f/8.

What do you guys think of this lens, I have no intention on buying it but it is 500mm prime for like $80 new. I know it is only useful with full manual and manual focus and you can't zoom out and it's also f8 so not for indoor use, but anyway what do you guys think of it. If you've used it or whatever.
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Old Jul 30, 2010, 12:53 AM   #2
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get what you pay for...
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Old Jul 30, 2010, 5:29 AM   #3
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It's a cheap refractive lens, so it will have a lot of chromatic aberration.

If you are looking for an inexpensive long lens, look at Catadioptric lenses instead:

Samyang 500mm f/8
Pro-Optic 500mm f/6.3
Phoenix 800mm f/8

They're still manual focus and manual exposure, but they have fewer polished surfaces, so they're sharper, and since there's not a lot of refracting going on, there's very little chromatic aberration.
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Old Jul 30, 2010, 6:59 AM   #4
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Old Aug 2, 2010, 12:02 AM   #5
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Thanks for the feedback. Like I said, I had no intention on buying anything like this. I've settled on the Sigma 70-300mm DG APO macro f4-5.6 lens.
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Old Aug 10, 2010, 2:16 AM   #6
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I have one of these made by Kalimar I paid $10 for on ebay. Worth it for that much but I've yet to really find a use for it. Min focus is 35' which is too far for birds and anything much beyond that needs more than 500mm.

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