Longer adjusting adapter for FLAT68III, FLAT7A

• Male thread: M48x0.75
• Female Thread: M80x0.75
• Length 45mm

To use this adapter, simply unscrew the original end adapter that terminates in the M48 male thread on the flattener and replace it with this longer adapter. 

Correct back focus setting specifications:

• For P-FLAT68III with FLT91 telescope: 5mm
• For P-FLAT68III with WIFD GT81 telescope:10.9mm
• For Flat7A with FLT120 telescope: 1.4mm