Built for wide-field imaging, the Gear Series 60mm Quad f/5 Astrograph OTA from Starfield features a two-element lens with an FPL-53 apochromatic element for accurate colors and a two-element corrector in the focus tube for edge-to-edge sharpness. The 44mm image circle is large enough to accommodate 36 x 24mm full-frame camera sensors. The ball bearing-supported 2.5" focuser is sturdy enough for heavy cameras and accessories. A tilt adjustment plate is included along with a manual camera angle adjuster for framing options. The OTA is compatible with an optional motorized focuser. Note that a mount and a tripod or pier are required to use this item and are sold separately.
Optical Performance
- 60mm diameter aperture
- 300mm focal length and fast f/5.0 focal ratio allow low exposure times
- Two-element lens with FPL-53 apochromatic element for true color rendition without aberrations across the entire field of view
- 44mm image circle allows for use of full-frame camera sensor
- Petzval design provides a 41-61mm working distance, eliminating need for back-focus calculation
Focuser
- 2.5" rack-and-pinion focuser with 1:10 gearing and ball bearing support can accommodate heavy astrophotography cameras, filter wheels, etc.
- Tilt adjustment plate and manual camera angle adjuster
- Compatible with optional focusing motor
- Integrated filter holder for 2" filters