How Good Are Opteka Lenses?
Screamin Scott wrote: Optically it isn't bad, but otherwise a pain to use. It utilizes a T mount to adapt to whatever camera you are using, only has one aperture setting (F8 or 16 depending on the focal length set up and similar to mirror lenses), manual focusing (not really a biggie though) & stop down metering. I don't know your age, but I suspect you are not familiar with the old "Spiratone" "Sharpshooter" from the 60's & 70's. Same principles involved here with this lens. I still have an ols 400mm F8 "Sharpshooter" but never use it anymore as I have newer lenses in that range, some AF others MF (but with auto indexing)
that's one way of putting it 
What doesn't sound too good to be true about this?
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