Products

Telescope: ZWO FF90 90mm f/6.8 Quadruplet APO Refractor Mount: ZWO AM3N Harmonic Drive GoTo Mount Tripod: ZWO TC40 Carbon Fiber Tripod Pier Ex...

90mm Aperture 609mm Focal Length (f/6.8) 4-Element Quadruplet Optical Design 44mm Full-Frame Image Circle 3" Dual-Speed Rack & Pinion Focuser ...

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 male threads on the camera side M48 x 0.75 female threa...

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 Unmounted Filters Sets for ZWO 7x36mm, 8x1.25", 2" and Mini EFWs Includes M2 Mounting Screws Prevents Internal Light Leaks Desc...

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 or 25 mm diameter protective window for select ZWO cameras Integrated UV/IR-Cut filter maintains natural color balance 1/4 λ surface flatnes...

1.25" and 2" Mounted or 36mm Unmounted Sets Greater than 92% Transmission at Passband Balanced 1:1:1 RGB Exposure Weighting 1/4 Wavefront Polished...

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 CAA with M42 Plate Stays at 16.5mm Ideal for ASI533, ASI2600, and Othe...

Adds a precise 16.5mm of optical path length Connects male M42 (T2) threads to female 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 43.2 mm clear aperture prevents vignetting with full...

Converts female M48x0.75 threads to female M42x0.75 T-threads Adds 0mm of optical path length to the imaging train Durable black anodized aluminum...

Replaces the ZWO EFW to achieve 55mm back focus with the OAG-L Adds only 15 mm of optical length to the imaging train Holds a single 2-inch mounte...

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...