Advanced Telescope Supplies
Australia's Premier CCD and Astro-Imaging Experts
William Optics (this is a graphics intensive page and may take a while to load.)
William Optics is a brand that is now synonymous with high quality refractors with a build quality that looks more at home in a jewelry store rather than an instrument supplier.
These precision refractors are available from 66mm to 132mm in aperture.
Beautifully corrected multicoated optics, precision 10:1 micro-focusers, jewel like engineering and a range of 2" and larger accessories makes these telescopes a very affordable investment that with care will last a lifetime.
William optics have an extensive range of high quality refractors and accessories. Please see the William Optics Web Site for a complete listing.
Above: Sky &Telescope Beautiful Universe Competition 2006
Solar Division. First Place and reader's choice award.
Zeinthstar 80FD/Pentax DSLR
Image by Peter J Ward
Below is a list of instruments that is recommended by Advanced Telescope Supplies that are ideally suited to Astro-Photography and CCD imaging. The FLT110 and 132 models in particular can be ordered with an optional 68mm diameter field flattner that will deliver pin-point stars to the edge of a 35mm CCD.
William Optics Zenithstar 80FD (Fluorite Doublet)
Aperture 80mm Focal Ratio F/6.9 Focal Length 555 mm
Objective Type FD, Air Spaced doublet, APO
Fully Multi-Coated, STM coating
Resolving Power 1.45" Limiting Magnitude 11.3 Lens Shade Retractable Focuser 2" 360° Rotating Camera-angle Adjuster, 1:10 fine focus
Focuser Travel Length 3.15" (80mm)
1.25" Adapter & 2" extender Included 1.25" Adapter Brass Compression Rings L- type Mount L Bracket Based
Megrez 90 FD Fluorite Doublet
Aperture 90 mm Focal Ratio F/6.9 Focal Length 621mm Objective Type Doublet FPL-53 Air Spaced Resolving Power 1.35" Limiting Magnitude 11.5 Lens Shade Retractable Focuser 360° Rotating Camera-angle Adjuster
1:10 Dual speed fine focus
1.25" Adapter Included 1.25" Adapter Brass Compression Rings Tube Diameter 90 mm Tube Length Fully Retracted 430 mm Tube Weight 7.1 lbs. (3.2 kg) Case High Quality Aluminum Case
WO 110 FLT Fluorite triplet
Aperture 110mm Focal Ratio F/7 Focal Length 770 mm Objective Type 3 elements Air-spaced, TMB design Resolving Power 1.05" Limiting Magnitude 12.0 Lens Shade Retractable Focuser 4" 360° Rotating Camera-angle Adjuster
1.25" Adapter Included 1.25" Adapter Brass Compression Rings Tube Diameter 115mm Tube Length 24.6" (630 mm) Fully Retracted Tube Weight 14.5 lbs.( 6.55 kg) Case High Quality Aluminum Case Case Dimensions
(WxHxD) 31.8" x 9.6" x 7.8"
(81.5cm x 24.5cm x 20cm)
(Total interior length 740mm) Case Weight 5.3 kg
WO132 FLT Fluorite Triplet
Clear Aperture 132mm Focal Ratio F/7 Focal Length 925 mm Objective Type 3 elements, Air-spaced, FPL-53 Resolving Power 0.86" Limiting Magnitude 14.5 Lens Shade Retractable (O.D. 168mm) Focuser 4" 360° Rotating Camera-angle Adjuster
1.25" Adapter Included 1.25" Adapter Brass Compression Rings Tube Diameter 141mm Tube Length
104cm (fully extended)
78cm (fully retracted)
Tube Weight 9 kg Case High-quality Aluminum Case Case Dimensions
(WxHxD) 99 x 34 x 30 cm Case Weight 13.5 kg
Pictured left, the TMB co-designed field flattner
Suitable for both the WO 110 and 132 FLT model Fluorite refractors
*$A770 inc GST
* Prices subject to change with $A to $US
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