Optical Accessories

Provides a fully corrected, upright, and non-reversed image Designed for 1.25" focusers and eyepieces 90° viewing angle for comfortable observing ...

1.25" Barrel Diameter 99% Dielectric Coated Mirror 1/12λ Mirror Surface Accuracy 12mm Thick Mirror Substrate 100% Real Carbon Fiber Side Plates ...

2" Barrel with 90° Viewing Angle 99% Reflectivity Dielectric Coatings 1/12th Wave Precision Polished Mirror 12mm Thick Mirror Substrate for Therma...

1.0x Flattener Power Designed for William Optics Zenithstar 61 Full-Frame Sensor Coverage Adjustable Back Focus Mechanism M54 Telescope Thread &am...

0.8x Focal Reducer & Field Flattener Optimized for GT71, GT81, Z81 & Z103 Refractors Illuminates Full-Frame Sensors Adjustable Back Focus ...

Dedicated Field Flattener for the William Optics FLT91 Telescope Corrects Field Curvature for Pinpoint Stars Edge-to-Edge Integrated Adjustment Ri...

Designed specifically for the William Optics ZenithStar 73 APO Delivers a 1.0x, perfectly flat field across full-frame sensors Connects to the Z73...

Adjustable reducer and field flattener for William Optics Z61 telescope Improves image sharpness and reduces distortion Description ...

Reduces focal length by a factor of 0.8x Designed for the William Optics Zenithstar 73 telescope Provides edge-to-edge flat field for full-frame s...

Includes two 20mm 66° wide-angle eyepieces High-quality BaK4 prisms with full multi-coatings Large 20mm clear prism aperture prevents vignetting I...

1.0x Flattener Power preserves native focal length Corrects field curvature for Full Frame sensors Designed for William Optics FLT132, GT102, and ...

Converts Astronomical Telescopes for Terrestrial Viewing 90-Degree Viewing Angle Accepts Standard 1.25" Eyepieces Anti-Reflection Coated BAK7 Pris...

1.25-inch eyepiece with 55° apparent field of view 12.5mm focal length for medium-high magnification viewing Description The W...

Dual-Bandpass for H-Alpha and Oxygen-III Suppresses Urban Light Pollution Ion Beam-Assisted Deposition (IBAD) Coatings High Durability and Easy-to...

48mm (M48) Filter Size Multi-Bandpass Light Pollution Suppression Passes H-α, H-β, and OIII Emission Lines Schott B270 Optical Glass Substrate STC...

40mm Focal Length 72° Apparent Field of View 2" Diameter Barrel 28mm Long Eye Relief Parfocal Design Description FAQ Specifications In the Box ...

Reduces focal ratio by a factor of 0.72x Corrects field curvature for full-frame sensors 3-element, 3-group optical design Connects to telescope v...

Reduces focal ratio by a factor of 0.8x Triplet lens design with 3 elements in 3 groups Corrects field curvature for full-frame sensors Designed f...

2.1mm Focal Length 150° Field of View Optimized for 1/3" Format Sensors Functions as an All-Sky Camera Lens Standard CS-Mount Thread Descriptio...

2.5mm Focal Length 170° All-Sky Field of View Designed for 1/2" Format Sensors CS-Mount Thread Description FAQ Specifications I...

Protects camera sensor from dust and humidity 21mm diameter for specific ZWO camera models High-transmission Anti-Reflection (AR) coatings 1/4λ su...

Corrects atmospheric dispersion for sharper planetary images Uses two H-K9L prisms with 2° deviation angles Features 1/10 wave optical accuracy to...

Reveals high-altitude detail on Jupiter and Saturn 20nm bandpass centered on the methane absorption line Standard 1.25" (31.75mm) threaded cell Re...

2.8mm to 12mm Zoom Focal Length Fast f/1.4 Aperture ~100° Wide Field of View Designed for 1/3" Format Sensors Standard CS-Mount Thread Descript...