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  • Bower

Bower 800mm f/8 Manual Focus Telephoto Lens for Pentax Screw Mount (M42)

  • Mirror Lens
  • Just 4.4" Wide & 5.2" Long
  • Accepts 105mm or 30.5mm Filters
  • B&H# BO8008KPSU
  • B&H Kit
  • Price: $ 249.99

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Bower 800mm f/8 Manual Focus Telephoto Lens for Pentax Screw Mount (M42)
  • Bower 800mm f/8 Manual Focus Telephoto T-Mount Lens
  • General Brand T-Mount SLR Camera Adapter for Pentax Screw Mount (M42)
  • Accessories
  • Features
  • Specifications
What's in the Box
Bower 800mm f/8 Manual Focus Telephoto T-Mount Lens
Bower 800mm f/8 Manual Focus Telephoto T-Mount Lens
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Bower

800mm f/8 Manual Focus Telephoto T-Mount Lens

B&H# BO8008K | Mfr# SLY8008

The Bower 800mm f/8 Manual Focus Lens is a catadioptric mirror T-mount lens, precision manufactured in South Korea.

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 or for nearly any film camera.  However, in every case the fixed f/8.0 aperture is not communicated to the camera body.  As such, you can use the camera in the "M" manual exposure mode or the "A" aperture-priority mode (if your camera is so equipped).

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
Filter Size
105mm front, 30.5mm rear
f/Stop Range
f/8.0 (fixed)
Minimum Focus Distance
11.5' (3.5 m)
Magnification
Not Specified by Manufacturer
Angle of View
2.6° x 1.7° (WxH)
1.7° x 1.1° (WxH) w/ APS-C (15 x 22mm) cameras
Groups/Elements
8/8
Length
5.2" (132mm)
Maximum Diameter
4.4" (111mm)
Weight
2.08 lbs (946g)
  • Front Cap
  • 1-Year Warranty
  • Front Cap
  • 1-Year Warranty
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