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Opteka 500mm f/8 Preset Telephoto Lens for Pentax AF SLR Cameras | 
 enlarge | Brand: Opteka
Category: Photography
List Price: $129.95
Buy New: $89.95
You Save: $40.00 (31%)
Rating:  1 reviews
Media: Electronics
Shipping Weight (lbs): 1.4
Dimensions (in): 12 x 2.8 x 2
MPN: 50687
UPC: 084438998870
EAN: 0084438998870
Availability: Usually ships in 1-2 business days
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| Features:
| • | Included: Soft lens pouch, Front and Rear Lens Caps, T-Mount Adapter, 10 Year Warranty | | • | This lens gives you the equivalent of looking through a pair of 10x power binoculars, Manual preset diaphragm, rotating tripod mounting collar | | • | Fully Multi-coated, exotic anti-reflection coatings, latest in computer-aided-design / computer-aided-manufacturing, Diamond-cut from crystal-clear, water-white optical glass | | • | 10 Year Warranty |
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| Editorial Reviews:
Product Description
A Opteka High Definition 500mm preset telephoto lens is great for nature and sports photography. The amazing power of this lens gives you the equivalent of looking through a pair of 10x power binoculars. It has a manual preset diaphragm, a rotating tripod mounting collar and a soft lens pouch. Because all Opteka lenses are designed and manufactured with the highest possible degree of consistency, you can swap lenses mid-shoot with no discernable variation in color or effect. The unprecedented purity, color saturation and repeatability of Opteka lenses virtually eliminate the need for lab color timing corrections caused by other lenses. This puts more creative control where it belongs, in your hands. Lens Construction: 7 elements in 5 groups, Angle of View: 5 , Minimum Focus Distance: 33 ft. Focus Modes: Manual focus Minimum Aperture: f/8.0 Maximum Aperture: f/32.0, Filter Size: 67mm
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| Customer Reviews:
A bargain at the price. September 14, 2007
F. Nitti (Chicago)
11 out of 11 found this review helpful
This lens has exceeded my expectations. For about $70 my hopes for quality weren't too high. When the lens arrived the barrel connecting the optical component section the the T-adapter was loose. A simple fix; I tightened it. When mounting the T-adapter, the scales on the lens barrel ended up on the bottom of the lens when fixed to the camera body. Another easy fix: loosen the adapter mount with a jewelers screwdriver and rotate the lens barrel until the scales are on top where they belong.
Optically the lens performs well. The aperature is set with one adjusting ring. Focus is set with the f-stop wide open to get the brightest image. Once focused the lens is stopped down to the desired aperature with a second adjusting ring. Simple.
A word about focusing. I also bought an Opteka 500mm mirror lens. The 500mm preset lens is much!!!! easier to focus than the mirror lens because the depth of field is so much greater.
The lens is light weight and seems well built. Just remember it's a $70 lens and not a $700 lens.
The pictures I've taken have nice contrast and are reasonably sharp if you take the time to focus carefully. This is a manually operated lens so you'll have to do some searching through your camera menus to set up your system to get properly exposed pictures. I use a K100d body and the set up wasn't difficult. That's it. I hope this was some help if you're considering this lens.
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