1.08x multi flattener, fully covering full frame sensor. Focal length is adjustable for various refractors including non-BORG telescopes.
- Works with objectives between 300 – 800mm focal length via adjustable lens barrel
- Fully covers 35mm full format sensors
- M57 male on objective side
- M57 female on camera side
- Back focus : 55mm
- 40.5mm filter thread in front of a lens barrel (allows to set 48mm or *52mm with a stepping ring.
* 52mm filter : too large for regular 2″ focusers
Each index mark is optimized to cover a 35mm full format sensor. For sensors smaller than APS-C sized sensors, the lens barrel should be extended out around