Bower 800mm f/8 Manual Focus Telephoto Lens for Canon EOS

BH #BO8008KCAF
Bower
Bower 800mm f/8 Manual Focus Telephoto Lens for Canon EOS
Key Features
  • Mirror Lens
  • Just 4.4" Wide & 5.2" Long
  • Accepts 105mm or 30.5mm Filters
The Bower 800mm f/8 Manual Focus Lens is a catadioptric mirror T-mount lens, precision manufactured in South Korea.  In this particular configuration, it is delivered with a T-mount to fit the Canon EOS system cameras.

This mirror lens works on both "full frame" cameras like the 5D or film cameras as well as the "APS-C" style digital SLR cameras.  However, in all cases the fixed f/8.0 aperture is not communicated to the camera body.  As such, you can only use the camera in the "M" manual exposure mode or the "A" aperture-priority mode.

This lens, at 4.4 x 5.2" and just over 2 pounds, has a broad diameter and stocky build.  It is a bit easier to handle than a normal 800mm refractor lens, but it is still a super-telephoto in any case (you should use a tripod/monopod in any case for best results).  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.

This lens is an ideal candidate for astrophotography use when mounted to a Vixen GP2 Photo Guider (or other motorized equatorial telescope mount).

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Bower 800mm f/8.0 Overview

The Bower 800mm f/8 Manual Focus Lens is a catadioptric mirror T-mount lens, precision manufactured in South Korea.  In this particular configuration, it is delivered with a T-mount to fit the Canon EOS system cameras.

This mirror lens works on both "full frame" cameras like the 5D or film cameras as well as the "APS-C" style digital SLR cameras.  However, in all cases the fixed f/8.0 aperture is not communicated to the camera body.  As such, you can only use the camera in the "M" manual exposure mode or the "A" aperture-priority mode.

This lens, at 4.4 x 5.2" and just over 2 pounds, has a broad diameter and stocky build.  It is a bit easier to handle than a normal 800mm refractor lens, but it is still a super-telephoto in any case (you should use a tripod/monopod in any case for best results).  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.

This lens is an ideal candidate for astrophotography use when mounted to a Vixen GP2 Photo Guider (or other motorized equatorial telescope mount).

Fixed-aperture 800mm f/8.0 mirror lens in T-mount
Multicoated optics
Distinct out-of-focus highlight characterization
White lens barrel helps prevent heat retention
Accepts small, less-costly 30.5mm filters upon rear of barrel (also accepts 105mm filters)
Made in South Korea

Bower 800mm f/8.0 Specs

Filter Size105mm front, 30.5mm rear
f/Stop Rangef/8.0 (fixed)
Minimum Focus Distance11.5' (3.5 m)
MagnificationNot Specified by Manufacturer
Angle of View2.6° x 1.7° (WxH)
1.7° x 1.1° (WxH) w/ APS-C (15 x 22mm) cameras
Groups/Elements8/8
Length5.2" (132mm)
Maximum Diameter4.4" (111mm)
Weight2.08 lbs (946g)
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