Sky Mentor Dark Frame Filter - 1.25" - DARK125 Equatorial Wedge At the heart of the

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

is the Permanent Periodic Error Correction (PEC)

5% of wavelengths that cause light pollution while allowing H-Alpha (656nm)

20 mm Focal Length

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

Sky Mentor Dark Frame Filter - 1.25" - DARK125 Equatorial Wedge At the heart of theSky 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