Product Description
The Opteka mirror lens is incredibly compact and lightweight. Using an advanced reflex design, this is a mirror lens that is ideally suited for wildlife and sports photography. It has a fixed aperture of f6.3. Opteka mirror lenses incorporates advanced computer designed optics and the latest in multi-coating techniques. The process of multi-coating assures virtually flare free photographs even under adverse lighting conditions resulting in crisp high contrast pictures with full color fidelity.
When combined with the T-mount to fit your camera system, this mirror lens mounts to camera and works on both "full frame" cameras as well as the "APS-C" style digital SLR cameras. T-Mounts are available for all the digital SLR systems, as well as for C-mount systems. However, in every case the fixed f/6.3 aperture is not communicated to the camera body. As such, you can use the lens in "M" manual exposure mode or "A" aperture-priority mode only.
This lens has a broad diameter and stocky build, making it a bit easier to handle than a normal refractor lens. It also has a much different rendering of out of focus areas than a normal lens; highlights will be doughnut-shaped rings with more saturation and contrast on the edge of the ring than on the center.
Specifications
Filter Size: 95mm front, 34mm rear
f/Stop Range: f/6.3 (fixed)
Minimum Focus Distance: 6.6' (2.0 m)
Angle of View: 4.1° x 2.7° (WxH)
Groups/Elements: 6/7
Length: 4.7" (120mm)
Maximum Diameter: 3.9" (98mm)
Weight: 1.55 lbs (705g)
Included Items
~ Opteka 500mm f/6.3 Telephoto Mirror Lens
~ T-Mount Lens Adapter
~ Lens Cap
~ 10 Year Warranty
- High definition multi-coated optics produce sharper, more intense pictures
- Incredibly compact and lightweight
- 7 elements in 6 groups
- Angle of view: 4.1° x 2.7°; Min Focusing Distance: 6.6' (2.0 m)
- May be combined with the Opteka 2X Multiplier for 1000mm Zoom (Sold separately - Amazon Item Code: B000JSZ41S)
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Customer Rating :  List Price : $249.99 Price : $139.95 
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Cheap price on"Opteka 500mm f/6.3 Telephoto Mirror Lens for Pentax K-30, K-2, K-M, K-5, K-R, K-X, K-7, K-2000, K20D, K100D, K110D, K10D and 645D Digital SLR Cameras" & for sale shoppings!
>>Opteka 500mm f/6.3 Telephoto Mirror Lens for Pentax K-30, K-2, K-M, K-5, K-R, K-X, K-7, K-2000, K20D, K100D, K110D, K10D and 645D Digital SLR Cameras
Tag : Check price "Opteka 500mm f/6.3 Telephoto Mirror Lens for Pentax K-30, K-2, K-M, K-5, K-R, K-X, K-7, K-2000, K20D, K100D, K110D, K10D and 645D Digital SLR Cameras" Reviews
Opteka 500mm f/6.3 Telephoto Mirror Lens for Pentax K-30, K-2, K-M, K-5, K-R, K-X, K-7, K-2000, K20D, K100D, K110D, K10D and 645D Digital SLR Cameras Reviews
| 8 of 8 people found the following review helpful  great value, By William Brian (UK) - See all my reviews Amazon Verified Purchase This review is from: Opteka 500mm f/6.3 Telephoto Mirror Lens for Pentax K-30, K-2, K-M, K-5, K-R, K-X, K-7, K-2000, K20D, K100D, K110D, K10D and 645D Digital SLR Cameras (Electronics) For those starting out with telephoto , this is an excellant choice for value and results at a fraction of the price of a fully compounded telephoto, and without the extra length required with the cheaper alternative of telescopic telephoto add ons. This is easy to use once you have understood how it works, gives sharp images and excellent value for money, if you want the real thing then you must be prerpared to pay from 5 times more. 7 of 7 people found the following review helpful  Telephoto on a budget, By Amazon Verified Purchase This review is from: Opteka 500mm f/6.3 Telephoto Mirror Lens for Pentax K-30, K-2, K-M, K-5, K-R, K-X, K-7, K-2000, K20D, K100D, K110D, K10D and 645D Digital SLR Cameras (Electronics) I didn't have high expectations when I ordered this lens. I just needed a long lens for experimentation purposes (i.e., having fun). Well, having used this lens a for a couple of days now I'm pleasantly surprised. It's small and lightweight, so it's easy to bring along when hiking outdoors. It's a fully manual lens, of course, so I wouldn't recommend this lens to inexperienced photographers. I use a viewfinder magnifier and a KatzEye focusing screen on my K20D, those help tremendously with getting sharp photos. The photos are not super-sharp, you definitely get what you pay for. But for everyday purposes and with good technique I get very usable photos.The downsides are inherent in this type of lens. You only get one aperture, f/6.3, which is relatively fast for a 500mm, but it also means that you cannot stop down for more depth of field. DOF can be very narrow when focusing close. The out-of-focus areas look --- shall we say, interesting at times ("donuts")... Read more |
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