Wiliam Optics William Optics Apochromatic refractor AP 81/478 GT81

Product description:

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"-R&P-Focuser:

• Extra-smooth 360° 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:

• 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

Specifications:

Optics
Type	Refractor
Type of build	Apochromat Triplet
Aperture (mm)	81
Focal length (mm)	478
Resolving capacity	1,42
Limit value (mag)	11,3
Light gathering capacity	130
Max. useful magnification	162
Tube weight (kg)	3,7
Tube length (mm)	484
Aperture ratio	5,9
Eyepiece holder
Type of build	Gear rack
Connection ( to eyepiece)	1,25"
Rotating	yes
Gear reduction	1:10 Fine movement
Included accessories
Dew Shield	yes
Prism rail	Vixen-Style
Miscellaneous	Guide scope rings