Eliminate the need to make focus adjustments when changing telescope eyepieces.
They are made of precision machined aluminium with black anodizing.
With parfocal ring equipped telescope eyepieces you can change magnifications quickly and easily.
This set of 3 Astromania Parfocal Rings lets you make a set of non-parfocal 1.25' telescope eyepieces parfocal for more efficient observing.
Also useful for setting focus point of calibration eyepiece used for focusing an imaging or guide camera.

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 2.6 inch
Height : 0.9 inch
Length : 2.6 inch

Item Weight: 0 ounce (View shipping rates and policies)
Shipping Weight: 0.32 ounce (View shipping rates and policies)

ASIN : B0140U9BHI