The stunning new William Optics Gran Turismo 81 FD APO Triplet f5.9
For more info or latest delivery - 02392 570283 / firstname.lastname@example.org
Delivery approx. 15 - 30 days
Dave Says: "The GT81 is a tried and trusted 3 element design with excellent colour correction, and this one has now been brought up to date, with a new R&P focuser and is a great all-round 'scope."
"I've had my own WO Megrez 72FD for 7 years and its still my most used APO, and this is its logical upgrade. With the same bomb-proof build quality and now brought up to date with a precision rack and pinion focuser making it ideal for portable astro-photography."
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... and comes with high quality soft carry bag.
The 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.
Add a Flattener 0.8x (6-GT81) for just £149 - see related products below.
- 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.
- 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 Detail
- 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, and the certainty that we will be there to assist you even beyond that, if you nee
Focal Ratio F/5.9
Focal Length 478mm
Resolving Power 1.43"
Limiting Magnitude 12.2
Objective Type Three element with FPL-53 Air Spaced, Fully Multi-Coated,STM coatings
Lens Shade Retractable
2" 360° Rotating Camera-angle Adjuster, 1:10 fine focus
Field Stops Knife-Edge Baffles
L-type Mount Bracket
Tube Diameter 90mm
Tube Length (440 mm) Fully Retracted
(484 mm) Fully Extended
Tube Weight 8 lbs.( 3.7kg)