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This version of the GT81 comes with the flattener/reducer Flat6A for GT81 Canon EOS T-mount. If you want to purchase the GT81 without flattener, please choose William Optics Rifrattore Apocromatico AP 81/478 GT81
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 tube to the elegant gold trim, this telescope has more than just good looks. 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.
Optically unbeatable:
- Triplet air-spaced 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/5.9 lens is ideal for astrophotography.
2.0" Crayford V-power Focuser
- New ultra smooth 2" Crayford V-power edition focuser with 1:10 dual speed: a treat to use during astrophotography. No image shifting (capacity 15lb.)!
- Comes with two locking screws on angled positions for heavy load applications.
- Chromed, soft thumbscrews, easy to use even with gloves on.
Patented Design:
- Stainless steel reinforcement inserts on both sides and on the back to allow heavy loading without problems
- diamond-coated drive system: very smooth, no lateral movement or tilting.
- Graduated scale for precise camera alignment
Simply Beautiful Finish:
- 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
