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Bower 500mm f/6.3 Manual Focus Telephoto T-Mount Lens

 

The Bower 500mm f/6.3 Manual Focus Lens is a catadioptric mirror T-mount lens, precision manufactured in South Korea.

 

Product Highlights

  • Mirror Lens
  • Just 3.9" Wide & 4.7" Long
  • Accepts 95mm or 34mm Filters
  • Requires Camera-Specific T-Mount
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Availability: In stock
SKU
SLY50063

The Bower 500mm f/6.3 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/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.

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 500mm f/6.3 mirror lens in T-mount
Multicoated optics
Distinct out-of-focus highlight characterization
White lens barrel helps prevent heat retention
Accepts inexpensive 34mm filters (upon the rear of the lens)
Made in South Korea
Performance
Focal Length500mm
ApertureMaximum: f/6.3
Camera Mount TypeT-mount (T-thread)
Format Compatibility35mm Film / Full-Frame Digital Sensor
DSLR (APS-C Sensor)
Angle of View
Minimum Focus Distance6.1' (1.86 m)
MagnificationNot Specified By Manufacturer
Maximum Reproduction RatioNot Specified By Manufacturer
Elements/Groups7/6
Diaphragm BladesNot Specified By Manufacturer
Features
Image StabilizationNo
AutofocusNo
Tripod CollarNo
Physical
Filter ThreadFront:95 mm
Rear:34 mm
Dimensions (DxL)Approx. 3.86 x 4.69" (98 x 119 mm)
Weight1.43 lb (650 g)
Packaging Info
Package Weight1.85 lb
Box Dimensions (LxWxH)7.0 x 4.8 x 4.7"
More Information
Specification
Focal Length500mm
Maximum Aperturef/6.3
Minimum Aperturef/6.3
Lens MountT-Mount
Format CompatibilityFull-Frame
Angle of View
Minimum Focus Distance6.1' / 1.86 m
Optical Design7 Elements in 6 Groups
Focus TypeManual Focus
Image StabilizationNone
Filter Size95 mm (Front)\n34 mm (Rear)
Dimensions (ø x L)3.86 x 4.69" / 98.04 x 119.13 mm
Weight1.4 lb / 650 g
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