Spike-a Metal Bahtinov Mask for 8" SCT's (Pre-Owned)

Spike-a Metal Bahtinov Mask for 8" SCT's (Pre-Owned)

Without a mask, focusing usually means trying to make stars look as small as possible, which is difficult and subjective. The Bahtinov pattern gives a clear visual indicator, so there is no guesswork. As you adjust focus, the center spike moves. When it sits exactly between the other two spikes, your telescope is perfectly focused.

Function: Makes very precise telescope focusing fast and easy, especially for astrophotography with an 8-inch Schmidt-Cassegrain telescope.

Specifications: Compatible with 8-inch Schmidt-Cassegrain telescopes, has Three adjustable plastic screws to secure to the OTA

Condition: Like new, no wear and tear that will affect use