Opteka 800mm f/8 High Definition Telephoto Mirror Lens for Digital SLR Cameras + Lens Converter To Telescope + 2X Teleconverter Kit Reviews
Opteka 800mm f/8 High Definition Telephoto Mirror Lens for Digital SLR Cameras + Lens Converter To Telescope + 2X Teleconverter Kit Feature
- Groups/Elements: 8/8
- Max Diameter: 4.37"
- Length: 5.72"
- Weight: 2.09 lbs
- Front Filter Size: 105mm
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.
Advances in high-index / low-dispersion optical glasses, new barrel materials, and exotic anti-reflection coatings, along with the latest in computer-aided-design / computer-aided-manufacturing, are combined to produce lenses of unprecedented quality. Diamond-cut from crystal-clear, water-white optical glass, Opteka lenses are ground and polished to a precise precision.
The Opteka 2x High Definition Tele-Converter is for use with T-Mount manual focus lenses. It will multiply the focal length of your existing lens by 2x, and will cut back the amount of light by two f/stops.
The Opteka 2x High Definition Tele-Converter is for use with T-Mount manual focus lenses. It will multiply the focal length of your existing lens by 2x, and will cut back the amount of light by two f/stops.
For example, using a 2x tele-converter with a 500mm lens will effectively increase the focal length to 1000mm. A lens set to f/2.8 will now be f/5.6. Convert Lens into a high powered Telescope
Fits T-Mount lenses
Will Magnify Your Lens 10X its Focal length
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Aug 23, 2011 22:41:08
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