Sky Rover Optics 0.8x reducer for 130GPS is a dedicated focal reducer with field-flattening correction, designed for astrophotography with the Sky Rover 130GPS refractor. It shortens the effective focal length of the optical system and creates a faster imaging setup while maintaining an image circle suitable for full-frame sensors.

The optical design consists of 3 elements in 3 groups and includes an ED glass element. The reducer is suitable for use with cameras and astrophotography accessories, including filter wheels and OAG units. The telescope-side connection uses an M92 × 1 thread, while the camera side uses an M48 × 0.75 thread. The required back focus is 55 mm from the rear M48 thread to the sensor plane.

Key features

• dedicated design for the Sky Rover 130GPS refractor
• 0.8x focal reducer with field-flattening correction
• designed for full-frame astrophotography
• optical system with an ED glass element
• threaded connection on both telescope and camera sides
• suitable for DSLR cameras, cooled astronomy cameras, filter wheels and OAG setups
• adjustable working distance for precise back focus tuning

Technical specifications

• type: focal reducer / field flattener
• compatibility: Sky Rover 130GPS
• reduction factor: 0.8x
• focal length after reduction: 728 mm
• focal ratio after reduction: f/5.6
• image circle: 44 mm
• sensor coverage: full frame
• optical design: 3 elements in 3 groups
• ED glass: yes
• telescope-side thread: M92 × 1
• camera-side thread: M48 × 0.75
• back focus: 55 mm from the rear M48 thread
• dimensions: 92 × 100 mm
• SKU: 25666