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Connects to M54 x 0.75 threaded accessories Accepts standard 2" mounted filters Magnetic holder for quick filter changes Adjustable tension screw ...

Holds standard 2-inch (50.8mm) mounted filters M48x0.75 internal threads for secure filter mounting Enables pre-loading multiple filters for rapid...

Securely Mounts 36mm Unmounted Filters Compatible with All 7-Position ZWO 36mm EFWs Includes M2 Mounting Screws Prevents Internal Light Leaks D...

Attaches Vixen-style finders and guide scopes Direct mounting to ZWO ASIAIR Pro and Plus units Includes two M4 x 8 mm mounting screws CNC machined...

1.25" non-rotating helical focuser 6mm of precise focus travel 0.1mm adjustment accuracy M42 female threads for direct OAG attachment Maintains gu...

Passes Infrared Light > 850nm Dramatically Steadies Planetary Views in Poor Seeing Enables Daylight Planetary and Lunar Imaging Standard 1.25" ...

21 mm diameter protective window for select ZWO cameras Integrated UV/IR-Cut filter maintains natural color balance 1/4 λ surface flatness preserv...

1.25" (31.75mm) Threaded Filter Set Greater than 92% Transmission at Passband Balanced 1:1:1 RGB Exposure Weighting 1/4 Wavefront Polished Optical...

Adds exactly 21mm of spacing to an M42 optical train M42x0.75 female threads on one side, male threads on the other Machined aluminum with a black...

Converts ZWO CAA Rotator to M42 T-Threads Maintains 55mm Backfocus Standard Zero-Profile Design Adds No Optical Path Length Ideal for ASI533, ASI2...

Adds a precise 16.5mm of optical path length Connects female M42 (T2) threads to male M48 threads Essential for achieving standard 55mm back focus...

Establishes precise 55mm back focus with specific ZWO camera/filter wheel combinations Provides exactly 22.5 mm of optical path length Connects M4...

Adds exactly 16.5 mm of spacing to an M48 imaging train M48x0.75 male and female threads Wide 48 mm aperture prevents vignetting with full-frame s...

Converts female M48x0.75 threads to female M42x0.75 T-threads Adds only 4 mm of optical path length to the imaging train Standard accessory for ma...

Replaces the ZWO EFW to achieve 55mm back focus with the OAG-L Adds only 15 mm of optical length to the imaging train Features an internal thread ...

Optical Length: 16.5mm Connection Side 1: M54x0.75 Male Thread Connection Side 2: M54x0.75 Female Thread Material: Anodized Aluminum Descriptio...

Adds precisely 21mm of optical path length M54x0.75 male and female threads for secure connections Prevents vignetting with full-frame sensors Mac...

Adds exactly 21mm of optical path length Connects M54 male threads to M48 female threads Standard 2-inch filter threading on the M48 side Black an...

Connects M54 female threads to M48 male threads Zero-profile design preserves critical back focus Converts larger M54 ports to the common M48 stan...

Corrects sensor tilt for sharp, round stars across the entire frame Adds a minimal 5 mm of optical path length to the imaging train Connects M68 (...

Includes 1.25" H-alpha, OIII, and SII filters 7nm bandpass for high-contrast imaging Ideal for creating "Hubble Palette" images Fine-optically pol...

Isolates Hydrogen-Alpha light at a 7nm bandpass Standard 1.25" threaded metal cell Blocks light pollution and moonlight for extreme contrast Multi...

7nm Bandpass at OIII Emission Line Isolates Planetary Nebulae and Supernova Remnants Standard 1.25" Threaded Filter Cell 1/4 Wave Optical Substrat...

Isolates the 672nm Sulfur-II emission line 7nm bandpass for high-contrast imaging Standard 1.25" threaded metal cell 1/4 wave polished substrate w...