Optical Accessories

William Optics new 45 Deg. EP will work with any 1.25" eyepieces and scopes with 1.25" eyepiece holders. It will turn upside down images right s...

All New 90 Degree 1.25" Erect Prism All New 90 degree high quality Erecting prism With helical Focuser barrel. Another beautiful product exclusiv...

William Optics 1.25" DURA BRIGHT Dielectric Diagonal Introducing New model William Optics Dura-Bright diagonal - a dramatic step forward in the ...

Now it's good time to get our ultra high quality diagonal at Low price! Limited time only! Order now! New (Dura Bright) Star Diagonal has been bo...

All New Adjustable Flat61 for Z61 Specifications More Information Specification Weight：0.27kg

All New Adjustable Flat73 for Z73 Specifications More Information Specification Weight：0.32kg

BEST PACKAGE PRICE ON THE MARKET William Optics does it better and especially cheaper! Until today, you could choose only between high-end expen...

CatEye 10mm 60 degree 16mm: Long Eye Relief flat field Perfect eyepiece for RedCat 51(On RedCat 51 has power x25)

Specifications More Information Specification

1.25” RedCat erecting prism - Silver Version (For RedCat 51 only) High quality erecting prism with Red anodized plate , the complete housing is ma...

William Optics is proud to introduce the SPL (Super Planetary Long eye-relief) eyepieces. This new Planetary Eyepiece series is designed for users...

Features STC Astro Duo-Narrowband filter can reduce the interference from artificial lighting in the city ,and enhance the wave length of Hα...

Features The SLR lenses focal distance is recommended for 60mm or more. It is specially designed Astro-Adapter M48-M56 P0.75mm for telescope...

SWAN: a huge-lens rich-field eyepiece at a very reasonable price! Fully multicoated advanced design for breathtaking and jaw-dropping 72 deg. ...

SWAN: a premium eyepiece for your most demanding observations. Unforgettable views of star clusters and the moon at 72 deg. F.O.V. A premium ...

ZWO 1/3″ 2.1mm 150 degree lensTechnical Parameter:Format support: 1/3″ sensorFocal length: 2.1mmWide angel: 150 degreeMatch Model：ASI120mm, ASI120m...

ZWO 2.5mm 170 degree lensTechnical Parameter:Format support: 1/2″ sensorFocal length: 2.5mmWide angel: 170 degreeMatch Model：ASI178MM, ASI178MC, AS...

AR Protective WindowZWO D21 AR protect windowTechnical Parameter:Diameter: 21mmType: AR windowThickness: 1.1mmFlatness: 1/4 λProtect the sensor fro...