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Brand Name Rating # of Ratings
William Optics William Optics 2" 99% Dielectric Dura Bright Carbon Fiber Mirror Diagonal for SCTs 4.9 20
William Optics William Optics 2" 99% Dielectric Dura Bright Carbon Fiber Mirror Diagonal for Refractors 4.9 20
William Optics William Optics 1.25" Binoviewer Package (with 1.25" Wide Angle Eyepieces and 1.6x Barlow) 4.6 19
William Optics William Optics 2" to 1.25" RotoLock Eyepiece Adapter # F-ROTO-A2-125 4.7 18
William Optics William Optics 1.25" Carbon Fiber Dielectric Star Mirror Diagonal 4.6 17
William Optics William Optics SCT Thread Adapter for 2" Diagonal 4.9 16
William Optics William Optics 2" Carbon Fiber Dielectric Star Mirror Diagonal with SCT Adapter 4.7 13
William Optics William Optics 2" Carbon Fiber Dielectric Star Mirror Diagonal for Refractors 4.7 13
Revolution Imager Revolution Imager R2 1.25" Live View CCD Video Astronomy Camera System # RI-KitR2 4.7 12
William Optics William Optics 1.25" 45-deg Erecting Prism Diagonal 4.9 11
William Optics William Optics Red Dot Finder with Quick Release Bracket # M-RDF-P 4.6 10
William Optics William Optics 2" Swan Series Eyepiece - 40mm 4.6 10
William Optics William Optics 2" 90-deg Erecting Prism Diagonal 4.8 8
William Optics William Optics 1.25" 99% Dielectric Dura Bright Carbon Fiber Star Mirror Diagonal 5.0 8
William Optics William Optics 1.25" 90-deg Erecting Prism Diagonal with Helical Focusing # D-EP90-125 4.5 8
Optolong Optolong UV / IR Cut Filter - 36mm Round Unmounted 5.0 6
Optolong Optolong UV / IR Cut Filter - 31mm Round Unmounted 5.0 6
Optolong Optolong UV / IR Cut Filter - Clip Filter for Canon EOS Cameras with APS-C Sensor 5.0 6
Optolong Optolong Ultra High Contrast UHC Nebula Filter - Clip Filter for Nikon D5000/D5100 Cameras 4.7 6
Optolong Optolong Ultra High Contrast UHC Nebula Filter - Clip Filter for Nikon D7000/D7100 Cameras 4.7 6
Optolong Optolong Ultra High Contrast UHC Nebula Filter - Clip Filter for Canon EOS Cameras with Full Frame Sensor 4.7 6
Optolong Optolong Ultra High Contrast UHC Nebula Filter - Clip Filter for Canon EOS Cameras with APS-C Sensor 4.7 6
Optolong Optolong L-Pro Deep Sky Filter - Clip Filter for Nikon D5000/D5100 Cameras 5.0 6
Optolong Optolong L-Pro Deep Sky Filter - Clip Filter for Nikon D7000/D7100 Cameras 5.0 6
Optolong Optolong L-Pro Deep Sky Filter - Clip Filter for Canon EOS Cameras with Full Frame Sensor 5.0 6
Optolong Optolong L-Pro Deep Sky Filter - Clip Filter for Canon EOS Cameras with APS-C Sensor 5.0 6
Optolong Optolong UV / IR Cut Filter - 2" 5.0 6
Optolong Optolong UV / IR Cut Filter - 1.25" 5.0 6
Optolong Optolong L-Pro Deep Sky Filter - 2" 5.0 6
Optolong Optolong L-Pro Deep Sky Filter - 1.25" 5.0 6
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