SharpStar 76EDPH - 2.5" - 0.82X Focal Reducer 2.5" - 0.82X Focal Reducer for the 76EDPH Apo Refractor Full frame Focal Reducer Focal Ratio Result: f/4.5 for the 76EDPH Form Factor: Triplet Lens Image Circle Result: 44 mm Back Focus: The standard 55 mm Back Focus Total Weight: Only 0.5 kg This SharpStar 76EDPH 2.5" - 0.82X Focal Reducer is ideal for use with the SharpStar model 76EDPH Refractor telescope for doing full-frame imaging with DSLR or other electronic cameras. The new 2.5 inch full frame reducer from SharpStar, for the 76EDPH APO 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, combined with your existing 76EDPH APO to provide 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 user can also unscrew the rotator if desired, to make the back focus 105 mm. The front thread is M74×1 mm, which is directly connected to the 76EDPH focuser, the other end has a M48×0.75 thread, making it a professional astro-imaging combination. The product is fully optimized to meet your stringent requirements for image quality. If you are using the SharpStar 76EDPH APO Refractor telescope for visual observations and are now ready to embark upon astro-imaging work, this is the ideal Focal Reducer you will want and be thrilled to use. Specifications: Model: 76EDPHSR Full frame Focal Reducer Optics Designed for use with 76EDPH Apo Refractor Size: 2.5" Form Factor: Triplet Lens Focal Ratio Result: f/4.5 Image Circle Result: 44 mm Back Focus: 55 mm Total Weight: 0.5 kg Lens Coatings: Full Multi-layer coatings Length: 77 mm Outer Diameter: 88 mm
