SharpStar 2.5" f/4.4 Full-Frame Reducer for 94EDPH Refractor ED Refractor we often encounter the problem

we often encounter the problem of needing more focus travel for certain eyepieces

Dioptrx likely has better multi-coatings than eyeglasses

3 arcsecond RMS

Minor axis of secondary mirror

19mm and 27mm focal lengths

SharpStar 2.5" f/4.4 Full-Frame Reducer for 94EDPH Refractor ED Refractor we often encounter the problemThis quad full frame reducer was designed for the SharpStar 94EDPH to effectively reduce the scope's focal ratio from 5. 5 to 4. 4. The four element air spaced optical design produces an image circle of 50 mm, great for full frame cameras! The SharpStar 94EDPH Reducer uses M74 threads to connect to the telescope and M48 threads that can receive either a 48 mm T ring for DSLR use or most astro cameras. Back focus is 55 mm. This reducer also includes a