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- William Optics GT71 71mm f/5.9 Triplet APO Imaging Package + FREE International Shipping
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- William Optics
- William Optics GT71 71mm f/5.9 Triplet APO Imaging Package + FREE International Shipping
William Optics GT71 71mm f/5.9 Triplet APO Imaging Package + FREE International Shipping
William Optics GT71 71mm f/5.9 Triplet APO Imaging Package + FREE International Shipping
Product Description
William Optics GT71 APO is a f/5.9 air-spaced triplet FPL-53 apochromat. This package includes a 0.8x Flat6A-III reducer cum flattener specially designed for GT71 to transform it into a f/4.7 imaging APO covering full frame sensor.
Includes
- GT-71 APO 3-element objective with FPL-53 extra low dispersion glass
- Flat6A-III 0.8x reducer flattener
- 2.5" 1:10 rack & pinion focuser
- Dual mounting rings with Vixen style dovetail bar
- Guidescope mounting rings
- 2" to 1.25" adapter with brass compression ring
- Retractable lens shade
- WO patented Bahtinov Mask Cover
- High quality soft carrying bag
Highlights
- 71mm f/5.9 triplet air-spaced objectives APO
- Includes 1 FPL-53 fluorite element
- Very sharp image with excellent colour correction
- Precision optics with fully multi-coated lenses using super-high transmission (STM) coating on all surfaces
- Designed for astrophotography and visual observation
Cyclops Optics' Exclusive Fine Tuning Service
We offer fine tuning service for the telescopes to provide a smoother screws control and grant the telescope a premium quality touch. The fine tune service costs HK$400 (US$50). It's now waived for time-limited period.
Specifications
Optical system | Air-spaced triplets with 1 FPL-53 fluorite element |
Aperture | 71 mm |
Focal length | 419 mm |
Focal ratio | f/5.9 |
Image circle |
> Full Frame |
Back focus |
54.8mm with Flat6A-II (adjustable) |
Resolution | 1.62 arcseconds |
Limiting magnitude | 11.1 |
Light gathering power | 103x |
OTA length |
392 mm (contracted) |
Weight | 2.95 kg |
Free shipping applies
United States, S. Korea, Japan, Malaysia, Philippines, Singapore, Hong Kong, Taiwan, Indonesia, Australia, New Zealand, Germany, France, Switzerland, Sweden, Denmark, Netherlands, United Kingdoms and others.
Warranty
7 days no question asked return if due to material or workmanship defects
2 years manufacturer's warranty from William Optics
Cyclops Optics Ltd. is an authorised dealer of William Optics' products.