Astromania 0.5X Reducer halves the focal length of your telescope, giving you a much wider field of view. You can use this, for example, for doing astrophotography using an astronomy webcam. Using the reducer is ingeniously simple - it is threaded for attaching to a C-Mount standard for C or CS mount CCTV type cameras with telescopes. Screw the Astromania reducer into C or CS mount CCTV type cameras and so double the size of the photographic image field. This lets you take images of much larger areas of the lunar surface, for example. The reducer is also great for taking videos of the Moon using your webcam. You can obtain even larger image fields with your astronomy webcam if you attach an extension tube (e.g. 25mm) between the reducer and camera.
- 85mm focal length and reduction factor of about 0.5x that depend on spacing; 0.5x focal reducer effectively halves the focal length of a telescope for enabling lower magnification
- Mounting threads: 1.25 inch filter thread or 28.5x0.75 mm on one sides; the opposite end of this adapter has a C-mount that is 1 inch diameter with 32 threads per inch standard for C or CS mount CCTV type cameras with telescopes
- A wider field of view and shorter exposure times for astrophotography; 2 lenses for better correction: cemented together and coated; black-anodized aluminum housing
- Free light transmission: 22.5mm lens aperture; can be used with additional spacers available separately to achieve further focal reduction
- Intended for use with with longer focal ratio telescopes and eyepieces of narrow to moderately wide apparent fields of view
- 85mm focal length and reduction factor of about 0.5x that depend on spacing; 0.5x focal reducer effectively halves the focal length of a telescope for enabling lower magnification
- Mounting threads: 1.25 inch filter thread or 28.5x0.75 mm on one sides; the opposite end of this adapter has a C-mount that is 1 inch diameter with 32 threads per inch standard for C or CS mount CCTV type cameras with telescopes
- A wider field of view and shorter exposure times for astrophotography; 2 lenses for better correction: cemented together and coated; black-anodized aluminum housing
- Free light transmission: 22.5mm lens aperture; can be used with additional spacers available separately to achieve further focal reduction
- Intended for use with with longer focal ratio telescopes and eyepieces of narrow to moderately wide apparent fields of view
