Product Overview
Key Features
- Specifically Designed for Refractor OTAs
- 45mm Backfocus
- Improves Astrophotography/Astro-Imaging
- Reduces Spherical Aberration
- Fully Multicoated Optics
- Fits 2" Focuser Drawtubes
- Standard T-Ring Threads
- Camera-Specific T-Ring Required for Use
This Field Flattener from Explore Scientific corrects and virtually eliminates the inherent spherical aberration at the edges of many curved lenses in refractor telescopes. Uncorrected, this aberration causes distortion in the field of view, often ruining astrophotography or CCD images. The optics on the field flattener
