Suited to astrophotography and visual use, the ED 80mm f/7 Doublet APO Refractor OTA from StarField features a doublet apochromatic lens system with extra-low dispersion glass for clear, bright, high-contrast images with true color rendition. Its two-speed brass rack-and-pinion focuser allows fine focusing and supports 1.25" and 2" eyepieces as well as hefty CMOS or CCD cameras and accessories. The OTA comes with a wide-angle 20mm eyepiece, a finderscope, and a 2" diagonal. It requires a tripod and mount for use, which are sold separately.
Optical Performance
- 80mm objective lens
- 560mm focal length
- Focal ratio: f/7
- Extra-low dispersion (ED) glass
- Air-spaced apochromatic doublet lenses eliminate chromatic aberrations for true color rendition and enhanced contrast
Focuser
- 2" diameter focuser
- Ball bearing-mounted solid brass dual-speed rack and pinion
- Supports the weight of astronomy cameras, filter wheels, etc.
- Accepts 1.25" and 2" eyepieces and male M63x1 threads
- Back focus: 123mm from 2" receptacle, 161mm from M63 thread
Mount
- User-supplied mount and tripod required
- Vixen-style dovetail plate included
- Heavy-duty rings
- CNC-machined aluminum tube