Filters
Mounting Ring for CAT 51
Sale price$40.85 USD
Regular price$43.00
Sale price$43.00 USD
1.25" 90° Dura Bright Dielectric Diagonal
Sale price$104.50 USD
Regular price$110.00
Sale price$110.00 USD
Riser Block for 51 Ring
Sale price$28.50 USD
Regular price$30.00
Sale price$30.00 USD
STC Astro Multispectra Filter (MS)
Sale price$188.10 USD
Regular price$198.00
Sale price$198.00 USD
Tilt Adjuster for RedCat51 V1
Sale price$47.50 USD
Regular price$50.00
Sale price$50.00 USD
Slide-base 50mm Guiding Rings
Sale price$60.80 USD
Regular price$64.00
Sale price$64.00 USD
2" Push-in Nosepiece → M48 Adapter
Sale price$31.35 USD
Regular price$33.00
Sale price$33.00 USD
54mm Flattener Extender for GT81 WIFD
Sale price$64.60 USD
Regular price$68.00
Sale price$68.00 USD
1.25" 45° Erecting Prism
Sale price$87.40 USD
Regular price$92.00
Sale price$92.00 USD
1.25" 2x Barlow nosepiece for binoviewers
Sale price$41.80 USD
Regular price$44.00
Sale price$44.00 USD
45mm Flattener Extender
Sale price$46.55 USD
Regular price$49.00
Sale price$49.00 USD
Elite Drawer OAG Kit
Sale price$368.60 USD
Regular price$388.00
Sale price$388.00 USD
Slide-base 50mm adjustable Guiding Rings
Sale price$60.80 USD
Regular price$64.00
Sale price$64.00 USD
Mini Vixen-style Finder Mounting Bracket
Sale price$60.80 USD
Regular price$64.00
Sale price$64.00 USD
STC Astro Duo-Narrowband Filter (Duo-NB)
Sale price$379.05 USD
Regular price$399.00
Sale price$399.00 USD
M42 Adapter for Elite Drawer OAG Kit
Sale price$23.75 USD
Regular price$25.00
Sale price$25.00 USD
Ultra Flat 132 (0.79x Reducer)
Sale price$853.10 USD
Regular price$898.00
Sale price$898.00 USD
M92 → M63 Adapter
Sale price$75.05 USD
Regular price$79.00
Sale price$79.00 USD
30mm Flattener Adapter
Sale price$46.55 USD
Regular price$49.00
Sale price$49.00 USD
1.25" 90° Erect Prism
Sale price$91.20 USD
Regular price$96.00
Sale price$96.00 USD
90mm Mounting Rings
Sale price$140.60 USD
Regular price$148.00
Sale price$148.00 USD
ZWO EAF Clutch
Sale price$94.05 USD
Regular price$99.00
Sale price$99.00 USD
2" Push-In Nosepiece → M63 Adapter for FLAT 6AIII
Sale price$41.80 USD
Regular price$44.00
Sale price$44.00 USD
M63 → M48 Photo Adapter
Sale price$60.80 USD
Regular price$64.00
Sale price$64.00 USD
Ultra Flat 156 (0.79x Reducer)
Sale price$853.10 USD
Regular price$898.00
Sale price$898.00 USD
[Bundle] RC Focuser & Reducer Kit
Sale price$1,568.45 USD
Regular price$1,651.00
Sale price$1,651.00 USD
Camera flanged adapter for SBIG STL-11000 CCD
Sale price$116.85 USD
Regular price$123.00
Sale price$123.00 USD
Flat4 Draw Tube Adapter
Sale price$60.80 USD
Regular price$64.00
Sale price$64.00 USD
Focuser for RC Telescope
Sale price$765.70 USD
Regular price$806.00
Sale price$806.00 USD
2" 90° Dura Bright Dielectric Diagonal for SCT threaded Scope
Sale price$163.40 USD
Regular price$172.00
Sale price$172.00 USD
FLAT 7A (0.8x Reducer)
Sale price$656.45 USD
Regular price$691.00
Sale price$691.00 USD
FLAT 8 (0.72x Reducer)
Sale price$765.70 USD
Regular price$806.00
Sale price$806.00 USD













































![[Bundle] RC Focuser & Reducer Kit](http://williamoptics.com/cdn/shop/files/RCFocuser-bundle-1.jpg?v=1714098916&width=2400)
![[Bundle] RC Focuser & Reducer Kit](http://williamoptics.com/cdn/shop/files/RCFocuser-bundle-2.jpg?v=1714098916&width=2400)










