The new 2019 GT81 MKIV (Fourth Generation) three-element super APO Anniversary offer superb quality for imaging and visual use at an affordable price！From the pristine white finish on the CNC to the elegant gold trim which has more than just good looks. Superior quality glass with a high quality rack and pinion focuser. A superb imaging OTA.
· 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.
2.5” R&P Focuser
· 2.5”R&P Ultra robust focuser with 1:10 dual speed: a treat to use during astrophotography. No image shifting! Heavy duty: perfect for your accessories.
Simply Beautiful Finish
· Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube, gold trim finish, retractable dewshield, 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.
· 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 need!
• Mounting Rings
• New 2019 CNC Carry Handle Bar
• New Dovetail Plate
• 2.5” R&P Focuser
• Innovative Bahtinov Mask Cover (Patented)
• Soft Carry Case
• Two-year, no fuss warranty and constant customer service!
• M63 -2” Rotolock
• 1.25” Rotolock
• 2019 All New Slide-base 50mm Guiding Rings
• All New 50mm/F4 Rotolock Guide scope
• New Full frame x0.8 Flattener
• Retracted Length：390mm
• Tube with Rings and Dovetail Weight：3.95kg