2009-11-01T19:00:00
Rated 5 out of 5
Affordable 800 mm T2-mount mirror lens
What a bargain!
I got used to mirror lenses back in film days, but I saw nothing like this one.
Look at the specs. If it looks good to you, give it a try.
But know what not to expect. This is a mirror lens, with a very narrow field of focus. No f-stop movement; no zoom. If that's OK, go for it.
stevewheal
2009-09-01T21:00:00
Rated 4 out of 5
Surprising
I've read a lot of negative reviews about mirror lenses, especially the lesser-known Korean brands like this one. Some even say they are no sharper than a good 200mm traditional telephoto lens. It's true that these mirror lenses are difficult to use, but as the image below shows, you can achieve results superior to the a 200mm lens from the same distance. In fact, the Pro-Optic showed a little over 4x the resolution of the 200mm lens in my test.
The image on the right is a 100% crop, from the Pro-Optic 800mm f/8 mirror lens, focused manually (of course). The image on the left was taken with the Canon 70-200mm f/2.8 IS USM at f/8 and autofocus, resized to match. Both were taken with a Canon 400D (Digital Rebel XTi) on a tripod with mirror lock-up.
DEREK H.
