Products

2-Sided Lunar Reference Map Side 1: Pinpoints Key Observable Features Side 2: Marks Historic Spacecraft Landing Sites Designed as a Companion for ...

City Light Suppression (CLS) Filter Enhances Contrast for Deep-Sky Objects Available in 1.25" and 2" Sizes Ideal for Viewing Nebulae and Galaxies ...

2.0" City Light Suppression (CLS) Filter Enhances Contrast for Deep-Sky Objects Darkens Sky Background in Light-Polluted Areas Threads into Standa...

Targets Hydrogen-Alpha emission nebulae 12nm bandpass for astrophotography 1.25-inch standard filter size Drastically improves contrast under ligh...

Isolates the Hydrogen-alpha emission line at a 12nm bandpass Standard 2-inch filter format for modern focusers and filter wheels Dramatically incr...

7nm H-Alpha Bandpass 2-inch Filter Format Isolates Hydrogen Emission Nebulae Blocks Urban Light Pollution Includes Individual Test Report Descr...

1.25" Diameter Filter Cell Isolates Hydrogen-Beta (H-Beta) Emission Line Dramatically Increases Contrast on Specific Nebulae Blocks Light Pollutio...

2.0-inch Barrel Size Isolates Hydrogen-Beta (H-Beta) Emission Line Dramatically Increases Contrast on Specific Nebulae Blocks Artificial Light Pol...

1.25" Barrel Size Oxygen III (OIII) Line Filter High-Contrast Visual Observing Ideal for Planetary Nebulae & Supernova Remnants Fits Standard ...

Oxygen III (OIII) Nebula Filter 2.0" Barrel Size Isolates Two Doubly-Ionized Oxygen Emission Lines Maximizes Contrast on Emission Nebulae Blocks B...

Isolates the ionized sulfur (S-II) emission line at 672nm Features a 12nm bandpass to increase contrast Standard 1.25-inch filter format Ideal for...

Isolates the ionized sulfur (S-II) emission line at 672nm Ultra-narrow 6.5nm bandpass for maximum contrast Standard 1.25-inch barrel size fits mos...

Isolates the 672nm Sulfur-II (S-II) emission line 12nm bandpass for high-contrast views 2-inch filter size with standard threads Blocks light poll...

6.5nm Narrow Bandpass Targets the 672nm Ionized Sulfur (S-II) Emission Line 2-inch Barrel Diameter for Larger Focusers Drastically Increases Contr...

UHC (Ultra-High Contrast) Narrow-Band Design Standard 1.25" Filter Threading Maximizes Contrast on Emission and Planetary Nebulae Aggressively Blo...

Ultra-High Contrast (UHC) Narrow-Band Filter Designed for Two-Inch Eyepieces and Filter Wheels Significantly Reduces Artificial Light and Airglow ...

ND 0.9 Optical Density 1.25" Barrel Diameter Reduces Glare for Lunar Observing Aids in Splitting Unequal Double Stars Uniform Light Transmission A...

ND 0.9 Optical Density 12.5% Light Transmission 2-inch Barrel Size Neutral Color Transmission Reduces Glare on Lunar Surfaces Description FAQ S...

Adds 1 inch of focuser back travel Designed for Explore Scientific 2-inch Rack & Pinion Focusers Compatible with Explore Scientific ED APO tel...

Adds Critical Outward Focuser Travel 2-inch Barrel Diameter Designed for Explore Scientific ED APO Telescopes Compatible with 2-inch Rack and Pini...

Adds 2 inches of extension Designed for Explore Scientific 2.5-inch Hexagonal Focusers Maintains rigidity of the optical train Enables focus with ...

Zero-power reflex sight for intuitive aiming Multi-dot reticle with 4.0°, 2.0°, and 0.5° circles Fits standard mini-Vixen style dovetail bases Int...

Deep Red LED Illumination Variable Brightness Control Fits 50mm Reticle Finder Scopes Compatible with EXOS2 & EXOS2GT Mounts Powered by 2 AA B...