Sky Mentor Dark Frame Filter - 1.25" - DARK125 Equatorial Wedge 20 mm Focal Length

20 mm Focal Length

constructed of Schott glass with anti-reflection coatings applied on both surfaces

then fine tune the image using the dual focus mechanism with course and fine adjustments

At the heart of the TeleVue 90 Degree Enhanced Mirror Star Diagonal - 1

Sky Mentor Dark Frame Filter - 1.25" - DARK125 Equatorial Wedge 20 mm Focal LengthSky Mentor Dark Frame Filter 1. 25" Sturdy dark frame imaging filter has standard 1. 25" threads. The filter frame is made of metal for durability. Quickly capture dark frames to optimize photo quality Opaque filters block all light from the imaging camera sensor and helps remove dark currents, especially in astrophotography. Easily eliminate camera noise and hot pixels! Dark frame acquisition helps remedy noise and "hot pixels" by canceling out these