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500mm f/8.0 Manual Focus Telephoto T-Mount Lens 

Style#: 50F8T-SON
 
The Digital-Nc 500mm f/8.0 Manual Focus Lens is a catadioptric mirror T 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.  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).
 
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
 
Performance:
 
Focal Length 500mm
Aperture Maximum: f/8
Camera Mount Type T-mount (T-thread)
Format Compatibility 35mm Film / Full-Frame Digital Sensor
DSLR (APS-C Sensor)
Angle of View
Minimum Focus Distance 5.7' (1.74 m)
Magnification Not Specified By Manufacturer
Maximum Reproduction Ratio Not Specified By Manufacturer
Elements/Groups 7/6
Diaphragm Blades Not Specified By Manufacturer
 
Features:
 
Image Stabilization No
Autofocus No
Tripod Collar No
 
Physical:
 
Filter Thread Rear:30.5 mm
Dimensions (DxL) Approx. 3.03 x 3.44" (7.70 x 8.74 cm)
Weight 11.64 oz (330 g)
 
Packaging Info:
Package Weight 1.0 lb
Box Dimensions (LxWxH) 6.3
 
Size (W x H x L): Approx. 3.03 x 3.44\\\" (7.70 x 8.74 cm)

Price: $229.00

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