William Optics Star 71 5 Element Astrograph

Now introducing the NEW William Optics Star 71R&P!!!

This scope is ultimately designed for astronomers who want the best results in photographic/CCD imaging. The WO-Star71 imaging telescope provides pinpoint stars at the very edge of a 45mm imaging circle.

Key Features

71mm f/4.9 Imaging Refractor Telescope.
FPL-53 glass for color free apochromatic performance.
5 elements in 3 groups (3-1-1- configuration; new, unique, patented design - not a conventional objective/flattener/reducer design).
Covers 45mm full frame imaging circle.
2.5" dual speed R&P focuser.
Includes mounting rings and Vixen style dovetail.
Weight = 4.5 lbs / 2.05 kg (OTA only); 5.3 lbs / 2.4 kg (OTA with rings and dovetail).
Focuser drawtube travel = 1.38" / 35mm.
Additional Information

Focuser drawtube terminates in a male M48 thread. Telescope comes with a wide M48-Canon EOS adapter ring. Similar rings are available from other supplier for other brands of cameras. Not a conventional 2" focuser tube with locking thumbscrews..
Optional 1.25" 90-deg dielectric mirror diagonal sold separately for those wishing to use this as a visual. This diagonal comes with a custom adapter that connects directly to the M65 female thread on the telescope's focuser tube; you cannot use standard 1.25" diagonals. Telescope cannot reach focus with larger 2" diagonals.

Technical Specs:

Aperture 71mm
Focal Ratio F/4.9
Focal Length 348 mm
Objective Type 5 elements in 3 groups (3-1-1- configuration; new, unique, patented design)
Lens Shade Retractable
R&P Focuser 2.5" dual speed R&P focuser
Focuser drawtube travel = 1.38" / 35mm
Type of Mount Includes mounting rings and Vixen style dovetail
Tube Weight Weight = 4.5 lbs / 2.05 kg (OTA only); 5.3 lbs / 2.4 kg (OTA with rings and dovetail)

William Optics GT81 - FPL53 Triplet APO Refractor

The stunning new William Optics Gran Turismo 81 APO is the new jewel of the apochromatic refractor world. From the pristine white finish on the CNC to the elegant gold trim which has more than just good looks... New GT81 features a 3-element objective using high-quality FPL-53 extra-low dispersion glass that reduces any secondary spectrum to an unbelievable degree.
Optically Unbeatable

Triplet air-spaced objective (FPL-53) in adjustable CNC machined ultra high precision lens cell.
Extremely sharp.
Excellent color correction.
Each lens is Fully Multi-Coated with a special super-high transmission coating (STM Coating) on all surfaces.
This F/5.9 lens is ideal for astrophotography.
2.0" R&P Focuser

Extra-smooth 360 deg. rotatable 2" R&P focuser with 1:10 dual speed: a treat to use during astrophotography. No image shifting!
Comes with two locking screws on angled positions for heavy load applications.
Large aluminum knob with installed thermometer.
Patented Design

Stainless steel reinforcement inserts on both sides and on the back to allow heavy loading without problems.
Graduated scale for precise camera alignment.
Simply Beautiful Finish

Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube, gold trim finish, retractable dewshield, 360 deg. rotatable R&P focuser, dewshield cap.
Top quality anodizing.
Very compact for carrying on flights.
Attention to Details

2" & 1.25" adapter included in the price.
Anti-marring brass compression rings.
Carry handle with V-shape night glowing illuminator.

90mm mounting rings are optional.

Though you will never need it, you have a 2-year warranty from WO.

Includes Mounting Bracket, Guider/Finder Rings and Carry Handle

Click here for Flattener 6 Spacing Requirements

Technical Specs:

Aperture 81mm
Focal Ratio F/5.9
Focal Length 478 mm
Objective Type Three element with FPL-53 Air Spaced, Fully Multi-Coated,STM coatings
Resolving Power 1.43 seconds of arc
Limiting Magnitude 12.2
Lens Shade Retractable
R&P Focuser
2" 360 Rotating Camera-angle Adjuster, 1:10 fine focus
1.25" Adapter

1.25" Adapter 2" Brass Compression Rings
Field Stops Knife-Edge Baffles
L-type Mount Bracket
Tube Diameter 90mm
Tube Length 440mm Fully Retracted
484mm Fully Extended
Tube Weight 3.7 kg

William Optics GT102 Triplet APO Refractor

Introducung the new William Optics GT 102 FPL53 Triplet APO refractor.

The new GT 102 features a 3-element objective using high-quality FPL-53 glass and combined with other extra-low dispersion glass that reduces any secondary spectrum to an unbelievable degree.

Three-element air-spaced primary objective (FPL-53) in adjustable CNC machined ultra high precision lens cell.

Extremely sharp with excellent color correction.

Each lens is Fully Multi-Coated with a special super-high transmission coating (STM Coating) on all surfaces.

This f/6.9 is great for astrophotography and can be matched with the GT 0.8x Reducer/Flattener

Click here to see the GT Reducer/Flattener

The reducer/flattener is available at 97 if purchased at the same time as the GT102

Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube, gold finish.

Retractable dewshield and golden cap.

360-deg rotatable all-new R&P focuser.

Top quality anodizing.

Very compact for carrying on flights.

2" & 1.25" adapter included in the price.

Anti-marring brass compression rings.

Mounting rings / dovetail are included.

Click herefor Flattener 6 Spacing Specifications

Technical Specs:

Aperture 102mm
Focal Ratio F/6.9
Focal Length 703mm
Objective Type 3 elements Air-spaced with FPL53 glass
Resolving Power 1.13arc"
Limiting Magnitude 13.9
Lens Shade Retractable
Linear Focuser 2.5" R &P focuser ,360 Rotating Camera-angle Adjuster, 2 speed 1:10 knobs
1.25" Adapter Included
1.25" Adapter Brass Compression Rings
Tube Diameter 105mm
Mounting Rings provided
Tube Length 27"(689mm) Fully Retracted
Tube Weight 11.1lbs. (5.0kg)

William Optics New FLT 132 DDG Triplet APO Refractor with 3" Click Lock Rack and Pinnion Focuser *New Low Price*

The new William Optics FLT 132 DDG includes 3 important new features

1) New Optical design. The latest FPL 53 triplet lens features a new and improved central element that provides superior contrast when compared to the original design

2) A new Steel lens cell that allows the scope to be used at very low temperatures without fear of the cell pinching the optics and also gives great robustness

3) The new FLT 98 now comes with WO FLT 3.5" R&P turn/click to lock design focuser.

No more compression rings on focuser drawtube and 2"/1.25" adapter.

The new FLT 132 DDG is a premium instrument and one of the best value and most versatile high quality APO refractors available.

Combine the FLT 132 with the FLT Flattener for full format 35mm CCD or DSLR imaging.

The FLT 132 is a true dual purpose scope.

It provides stunning sharp and contrasty images and delivers delightful planetary views as well as punching well above it's weight for deep sky observing.

In addition it performs superbly as an astrograph and is one of the few scopes able to handle full format 35mm CCD Cameras and DSLR's when used with the dedicated FLT Flattener.

It can also handle APS sized sensors and the popular Kodak KAF 8300 8.3MP sensors when used with the Flattener IV at F5.6

As usual with William Optics the fit and finish is exemplary.

Includes high quality CNC tube rings and hard case.

The IKHAROS Full Format Field Flattener Can Be Purchased at the same time as the FLT 110 for 73

Technical Specs:

Aperture 132mm
Focal Ratio F/7
Focal Length 925mm
Objective Type 3 elements, Air-spaced, FPL-53
Resolving Power 0.86"
Limiting Magnitude 14.5
Lens Shade Retractable (O.D. 168mm)
Focuser 3.5" NEW heavy duty DDG focuser
360 rotatable graduated camera adjuster
1.25" Adapter included
1.25" Adapter Brass Compression Rings
Tube Diameter 141mm
Tube Length 104cm (Fully Extended)
78cm (Fully Retracted)
Tube Weight 9kg
Case High-quality Aluminum Case
Case Dimensions
(WxHxD) 99cm x 34cm x 30cm
Case Weight 13.5kg

William Optics FLT 98 in Aluminium Tube with **New Rack andClick Lock Pinnion Focuser** New Low Price

The FLT98 is a portable, high quality, versatile APO telescope designed for individuals who want a very high quality instrument in a relatively compact package. Optically these scopes have been a great success and are amongst the very best 4" class APO refactors available.

The new FLT 98 now comes with WO FLT 3.5" R&P turn/click to lock design focuser.

No more compression rings on focuser drawtube and 2"/1.25" adapter.

Only a a rack and pinnion focuser has the mechanical strength to hold heavy cameras and accessories without slipping and flexure. They can be fully locked down unlile a Crayford and once locked will not slip or flex.

This is hugely welcome addition and really sets these scopes apart from the competition.

Stunning Optics

Features a top-quality triplet f/6.3 air-spaced objective

This scope is extremely sharp and has great color correction. It is ideal for astrophotography and with the FLT flattener will provide full format imaging at the fast F6.3 focal ratio.

Precision optics with STM coatings.

Designed by leading Russian designer with FPL-53 glass.

Simply Beautiful Finish

Solid CNC-machined mounting rings included in the price.

Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube, golden finish, retractable dewshield, anodized 360 deg. rotatatable rack and pinnion focuser, dewshield cap.

Total Quality Package

Dedicated field flattener available.
2" & 1.25" adapters included.

All with brass anti-marring compression rings.

High Quality Soft Carry Case.