Bower

Bower T-Mount 500mm f/8 Mirror Telephoto Lens with Case, Skylight, Neutral Density 2 (ND2) & Neutral Density 4 (ND4) Filters (Requires T-Mount)

SKU: BOW5008 MFR: SLY5008
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About the Bower 500mm F/8

The Bower 500mm f/8.0 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. However, in every case the fixed f/8 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.

Despite this lens' long 500mm focal length, it has a compact 3 x 3.5" size and weighs under 1 pound, making it a bit easier to handle than normal 500mm refractor lenses (it should be used with a tripod or monopod in any case). 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).

Bower 500mm F/8 Includes

  • Bower 500mm f/8.0 Manual Focus Telephoto T-Mount Lens
  • Front Cap
  • Bower Warranty

Bower 500mm F/8 Features

  • Fixed-aperture 500mm f/8 mirror lens in T-mount
  • Multicoated optics
  • Distinct out-of-focus highlight characterization
  • Excellent close focusing capacity
  • Accepts 30.5mm filters at rear of lens barrel

Bower 500mm F/8 Specifications

Filter Size 30.5mm (rear)
f/Stop Range f/8.0 (fixed)
Minimum Focus Distance 5.6' (1.7 m)
Magnification 1:2.7
Angle of View 4.1° x 2.7° (WxH)
2.7° x 1.8° (WxH) w/ APS-C (15 x 22mm) cameras
Groups/Elements 6/7
Length 3.5" (88mm)
Maximum Diameter 3.0" (77mm)
Weight 0.70 lb (320g)
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