2″ OIII Filter

279.95 $

The OIII filter is to be used from a aperture of more than 6″ (15cm) on. At smaller instruments there is not enough light available for a sensible use. Many experienced Deep- Sky- observers rather use the OIII filter at instruments with more than 10″ (25cm) despite the smaller field of application than the more versatile UHC filter.

SKU: 05AST00013 Category:

Description

The OIII filter is to be used from a aperture of more than 6″ (15cm) on. At smaller instruments there is not enough light available for a sensible use. Many experienced Deep- Sky- observers rather use the OIII filter at instruments with more than 10″ (25cm) despite the smaller field of application than the more versatile UHC filter.