Astronomik OWB CCD Original White Balance Filter, Type 3, mounted in...
Celestron Nature DX 12x56 Bak 4 prism binocular. Designed with the...
Cannocchiale terrestre Celestron...
Astro-Physics 0.75X Photographic-Visual Telecompressor (focal reducer). It reduces the native focal length of the system on which it is used by 0.75 times. For instance , a F/6 refractor will be transformed in to a faster F/4.5 optical system.
Vixen 0.67x focal reducer for ED81S, ED103S, and ED115S refractors. Illuminated field of 35 mm, corrected field ~ 20 mm. Threaded M60 male for telescope attaching, Threaded M60 female for camera attaching.
The Vixen Reducer HD Kit for Vixen FL55SS apochromatic refractor includes the Flattener HD field flattener for FL55SS, the Reducer HD aplanatic focal reducer for FL55SS and the EX Tube 66 extension tube. Complete correcting and reducing lens system for Vixen FL55SS fluorite apochromatic refractor. Advanced Vixen AS Coating with 99.9% light transmission on...
The Vixen Reducer HD for Vixen FL55SS apochromatic refractor includes the aplanatic focal reducer for FL55SS only. In order to correctly use it you will need the field flattener Flattener HD for Vixen FL55SS sold apart or in kit. Advanced Vixen AS Coating with 99.9% light transmission on each surface.
The Vixen SD Reducer HD Kit includes the SD Flattener HD filed flattener, the SD Reducer HD aplanatic focal reducer, the EX Tube 66 extension tube and the specific extension tube to be used along the SD81S. Complete correcting and reducing lens system for Vixen SD81S, SD103S e SD115S optics.
The Vixen SD Reducer HD is an aplanatic focal reducer desigend to work with Vixen AX103S astrograph and Vixen VC200L Visac catadioptric. When used together the Vixen SD Flattener HD it can be used also onto Vixen SD optics. It delivers high contrast flat field over an imaging circle up to 44 mm, perfect also for full frame (24x36 mm) CCD/CMOS sensor.
This Vixen Focal Reducer takes the standard 1800 mm (F/9) focal length down to 1278 mm (F/6.4). Increasing the field of view and decreasing the exposure time to dramatically increase your density or signal to noise ratio. Optional Direct Wide Photo Adapter 60 and T-Ring or Camera Adapter 43 and T-Ring needed to mount to camera.
The focal reducer for the AX103S Refractor telescope is designed for APS-C format cameras. It reduces the focal length of the Vixen AX103S Super Apo refractor by 0.7x, changing to F/5.6. Use with a wide photo adapter 60mm and appropriate T Ring for your camera for prime focus photography. Backfocus: 63.5 mm. Weight: 140 g.
This focal reducer is designed for Vixen's VMC200L, VMC260L and VMC330L reflector telescopes. Reduces focal length by 0.62x; Changes VMC200L to F/6, VMC260L to F/7.1 and VMC330L to F/8.1. Weight: 183 g. Backfocus: 63.5 mm.
Celestron focal reducer lens with 0.7x compression factor for Edge HD 925 telescopes with 9.25" aperture. Focal reducer makes Edge HD 925 one full F-Stop faster than F/10, reducing your exposure time by half to capture the same brightness of object.