Product Description
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).
| 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 | 5° |
| Minimum Focus Distance | 5.7' (1.74 m) |
| Magnification | Not Specified by Manufacturer |
| Maximum Reproduction Ratio | Not Specified by Manufacturer |
| Optical Design | 7 Elements in 6 Groups |
| 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) |
| Warranty Length | |
| USA Warranty Extension |
