Baader Hyperion fine tuning ring 28mm/M48

Extension ring to 2″ outside diameter. Hyperion fine tuning ring
28mm for Baader Hyperion eyepieces and M48 extension.
Extension ring with M48 x 0.75 filter thread on both sides and a
Overall length of 28mm. The adapter is made of aluminum and black anodized.
Increase in magnification of the Hyperion eyepieces by approx. 40%.
Screw the extension ring between the lower element of the
Hyperions and the eyepiece body and the focal length of the eyepiece
shortens by approx. 40%. The increases by the same value
Enlargement.
Use as M48 extension ring. Especially in astrophotography
it is often necessary to have a precisely defined distance from the corrector to the
Make camera sensor, this ring will help with that.
Thread: M48x0.75 on both sides (male/female)
Length: 28mm
Length M48 internal thread: 3mm