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Houses seven 36mm unmounted filters Adds a minimal 20mm of back focus to the imaging train 7-position carousel for LRGB, narrowband, or custom set...

Holds 8 x 1.25" or 31mm unmounted filters Adds 20 mm of back focus to the imaging train USB-powered stepper motor for precise filter selection Red...

Connects Canon EOS lenses to ZWO Electronic Filter Wheels (EFW) Engineered for ZWO cameras with 6.5mm back focus (e.g., ASI1600) Establishes the c...

0.7x Focal Reduction Factor Designed for ZWO FF107 & FF130 APO Refractors Triplet Optical Design with 1 ED Element Standard 55mm Back Focus In...

Connects Canon EOS lenses to ZWO ASI cameras Accepts standard 2" mounted filters Magnetic holder for secure, fast filter changes Adds 26.5mm of op...

Adapts Nikon lenses to ZWO ASI cooled cameras Accepts standard 2-inch (M48x0.75 thread) mounted filters Ultra-thin 29 mm profile maintains focus I...

Accepts standard 2-inch mounted filters Adds a precise 21mm to the optical path M42 x 0.75 female threads on the camera side M48 x 0.75 female thr...

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...