|※ 윌리엄 옵틱 GT81 & 소프트 케이스
|윌이엄 옵틱의 최신 트리플렛 아포 굴절 망원경
금장 장식의 세련된 미를 자랑하는 최고급 굴절 망원경, 최고급 소재인 FPL-53을 사용한 트리플렛 아포 망원경의 성능과 세련된 디자인은 사용자의 보다 멋스럽게 만들어 줍니다. 본 제품은 기본적으로 윌리엄옵틱 정품 소프트 케이스 함께 제공 됩니다
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.
-Triplet air-spaced objective (FPL-53) in adjustable CNC machined ultra high precision lens cell.
-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 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, and the certainty that we will be there to assist you even beyond that, if you need!
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 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