This extreme 650-1300mm f/8-16 Manual Focus Lens from Bower is an economical way to achieve some ultra-telephoto photography, all the way up to 1300mm. This is a T-mount lens, which means that aperture is not communicated to or controlled by the camera body and as such must be used only in aperture-priority auto exposure mode (if your camera has it) or in the manual exposure mode.
It will work on both "full frame" digital cameras as well as the smaller-format APS-C (15 x 22mm) cameras, but has only one effective aperture at any focal length, which varies from f/8.0 at 650mm to f/16.0 at 1300mm. That's not much of a hindrance, however, as you'd likely use this lens at its relatively small maximum aperture in any case.
This lens requires bright light and a high ISO setting on the camera to get a fast shutter speed (or fast film in a film camera) and needs a sturdy tripod or monopod, but can deliver very sharp results if used properly.
|Angle of View:||3.8-2.0°|
|Length:||23.3" (592mm) @ 1300mm focal length|
|Maximum Diameter:||4.1" (105mm)|
|Minimum Focus Distance:||16.4' (5.0 m)|
|Weight:||4.4 lbs (2 kg)|
|f/Stop Range:||f/8.0-16.0 (only one effective aperture at any focal length)|