Showing all 8 results
-
not ratedWilliam Optics 1.25” RedCat Erecting Prism – Silver
- Image erecting BAK4 prism with anti-reflection coating
- High accuracy and high light transmission prism
- 1.25” barrel for any 1.25” eyepieces
- Unique design & Superior Craftsmanship
- Internally matte blackened and threaded for no internal stray light reflection
- Entirely aluminium, red anodised
-
not ratedWilliam Optics GT81 IV APO
- Only Gold in stock, more colours available soon
- Lens Diameter: 81mm
- Focal length: 478mm
- Speed: f5.9
- 2.5″ Focuser
- Maximum meaningful magnification: 202.5x
- Minimum meaningful magnification: 12.96x
- Maximum resolution (arcsec / pixel): 1.43
- Limit Magnitude: 12.43
-
not ratedWilliam Optics RedCat 51 APO f/4.9
- Interchangeable Camera Mount
- Full Frame/ APS-C Compatible
- World’s Sharpest 250mm
- Apochromatic FPL-53 Lens
- Super Bright Bahtinov Mask
- Dual Spec Mounting Base
- Field Rotator for framing
- Small and easy to store
- 48mm Filter slot in the adaptor
- Modular Mounting Options
- Invertable Sun Shade/ Dew Shield
-
not ratedWilliam Optics Uniguide 32 mm Guide Scope
- 1.25 inch adapter for connecting a guide camera
- M42 thread for a screw connection of a guide camera
- Focus by turning the lens and fixing it with a ring
- Vixen type sliding base
-
not ratedWilliam Optics Uniguide 50mm Guide Scope
- Lens Diameter: 50mm f / 4
- Focal length: 200 mm
- Weight: 520gr
- Dovetail connection
- Slides directly into carrying handles of William Optics telescopes.
- Length: 265 mm
- Available in Red and Gold
-
not ratedWilliam Optics ZenithStar 61 II
- Available in Gold, Red and Space Grey
- New tube ring
- Real Vixen style dovetail
- Handle with guide scope option
- CNC made
- Lens Diameter: 61mm
- Focal length:360mm
- Speed: f5.9
- Maximum meaningful magnification: 152x
- Maximum resolution (arcsec / pixel): 1.9
- Image circle (mm):43
- Limit Magnitude: 11.63
- Coatings: Others
-
not ratedWilliam Optics ZENITHSTAR 73 III
- Lens Diameter: 73mm
- Focal length: 430.7mm
- Doubled FPL 53 optic
- Weight: 2.5 kg
- Speed: f5.9
- Maximum meaningful magnification (x): 182.5
- Minimum meaningful magnification (x): 11.68
- Maximum resolution (arcsec / pixel): 1.59
- Limit Magnitude: 12.02
- Coatings: STM-Coated
-
not ratedWilliam Optics Zenithstar 81 APO III
- Lens Diameter: 81mm
- Focal length: 558.9mm
- Speed: f6.9
- Maximum meaningful magnification: 202.5 x
- Minimum meaningful magnification: 12.96 x
- Maximum resolution (arcsec / pixel): 1.43
- Limit Magnitude: 12.24
- Coatings: Others
- Available in blue – More colours available soon
