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Review Summary
2019-01-29T15:34:54
I still favorite pentax most use for astronomy .
Bart B.
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95mm front, 34mm rear
f/6.3 (fixed)
6.6' (2.0 m)
4.1½ x 2.7½ (W x H)
2.6½ x 1.7½ (W x H) w/ APS-C (15 x 22mm) cameras
6/7
4.7" (120mm)
3.9" (98mm)
1.55 lbs (705g)
636980500010

camera for astronomy
By Bart B.
I still favorite pentax most use for astronomy .
Bower T-Mount 500mm f/6.3 Mirror Lens with Case, Requires T-Mount
The Bower T-Mount 500mm f/6.3 Mirror Lens with Case is a catadioptric mirror T-mount lens. When combined with the T-mount to fit your camera system, this mirror lens mounts to camera and works on both "35mm/Full Frame Sensors" 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 telephoto lens has a broad diameter and stocky build, making it easier to handle than a normal refractor lens. A White lens barrel helps prevent heat retention. It also has a much different rendering of out of focus areas than a normal lens, where highlights will be doughnut-shaped rings with more saturation and contrast on the edge of the ring than on the center. This T-Mount 500mm mirror lens is offered with free shipping, in new condition only!
Product Highlights
From the Manufacturer
The Bower 500mm f/6.3 Manual Focus Lens is a catadioptric mirror T-mount lens. 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. 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.