Excerpt: I bought the lens in sep 2010 via internet from Adorama in Nyc. The lens was most propably wrongly assembled as you can't get a even close to sharp photo. When adjusting distance you see only a non focus preview and the final pic is useless. <br />As I tested the lens and found it does not meet any of my need. I got angry and put it away. Today nearly 3 yers later I found it in my closet, got angry and checked the lens again. Total useless.
Excerpt: If your T-mount "breaks in two pieces" check the screws that hold the two parts together: they do come loose. If you loose one (or more...) of these you'll just have to get a new T-mount... Keep a jeweler's screwdriver of the appropriate size in your camera bag so you can tighten these screws as needed.
Excerpt: Back in the olden days when we we used analog capture, we used a trick for determining exposure on the fly called the sunny 16 rule. On a sunny day at F16 you would use the ASA/ISO index as the shutter speed. So if using 200 ASA/ISO then you would be shooting at 1/200 of a second. Open up 2 stops for the shadows. <br /><br />Of course you would need to shift your shutter speed accordingly if you wanted to use a different f stop.<br /><br />Hope this helps.
Excerpt: Do not expect a 100% keeper rate or ease of use here. This lense takes practice and a fair amount of involvement to use, especially when handheld. You can expect great shots out of it though. 500mm and donut bokeh opens many doors!!!
Pros: Donut bokeh, Durable, Easily Interchangeable, Rugged, Strong Construction
Cons: Long and not so bright, Low color saturation, Poor in Low Light
A very long lens with great results if you have patience and a smart camera
31 May 2011
Summary: My first attempt with a mirror lens and was surprised I managed to get some in-focus shots right away. I'm sure the Sony A55 with focus magnifier should get the credit. I'm looking forward to trying it out on the polar bears this September.
Excerpt: Excellent value at the price. However, for ~$500 you could get a Canon 75-300 IS with a noticeable increase in sharpness and not a lot more weight.<br /><br />The setup: Canon 7D on Tripod bright sun, F 6.3 at 1/800 shutter speed using aperture preferred mode. Photographed objects were at 15+ meters.<br />JPG large output (18 MP)<br /><br />Pro Optic image was entirely acceptable. Image from EOS 75-300 zoomed to 300mm and cropped to 500mm equivalent was sharper.
Excerpt: This IS NOT $1000.00 lens so DO NOT expect it to perform like one. I read all the reviews, including the negative ones, and decided to go ahead and buy it. I am glad I did. It is totally manual focus and if you take your time you can get some good shots. I have placed several I took the first day I owned the lens. It works great in sunlight and you can get some great effects with it.
Pros: Consistent Output, Durable, Easily Interchangeable, Strong Construction
Excerpt: Great product for its price. Although you have to focus manual and there is no metering (you have to use the histogram for proper exposure)I've taken wonderful shots with it, handheld (over 1/250sec)and tripod.
Excerpt: I was torn as to whether to return this thing or not - the D60 can't recognize the lens, so it's fully manual. The built-in metering doesn't work at all.... I can set an F-Stop, but on manual, with a no-CPU lens, it's ignored. I'm still experimenting with the Auto-ISO. Since I have another body here (if I can find the fool T-adapter), or it might work on my daughter's N6006, it's staying.