SharpStar 61EDPH 0.8X Focal Reducer
for Full Frame Cameras
- Full frame Focal Reducer
- Focal Ratio Result: f/4.5 for the 61EDPH
- Form Factor: Triplet Lens with full surface Multi-Coatings
- Image Circle Result: 44 mm
- Back Focus: The standard 55 mm Back Focus
- Tube Diameter: 65 mm
- Primary Mirror Connecting Ring Diameter: 75 mm
- Total Length: 95 mm, including M48 threads
- Total Weight: Only 0.45 kg
This SharpStar 61EDPH 0.8X Focal Reducer is ideal for use with the SharpStar model 61EDPH Refractor telescope for doing full-frame imaging with DSLR or other electronic cameras. The 0.8X focal reducer is made of high quality metal, with a beautiful design, and it's simple to use. The focal ratio is reduced from the original f/5.5 to f/4.5, and combined with your existing 61EDPH APO, produces sharp images and bright peripheral stars. It's an indispensable accessory for astro-imaging enthusiasts.
A triplet air-spaced design, including a 360° rotator and M48 thread. Fully considering the needs of pro users, the back focus including rotator is the standard 55 mm. The 61EDPH reducer is equipped with a 2.3" tube, one end of which adopts a M63×1 thread and connects to the pinion focuser of the primary mirror. The other end has an M48×0.75 thread, and the focal plane is 55mm from the end interface. If you need to expand the back focus, it can measure up to 99mm by removing the end interface and then using your own accessories to achieve the back focus you require.
If you are using the SharpStar 61EDPH APO Refractor telescope for visual observations and are now ready to embark upon astro-imaging work, this is an important accessory to add to your gear box.