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Cyclops Optics

William Optics GT71 71mm f/5.9 Triplet APO Imaging Package

US$1,018.73

William Optics GT71 71mm f/5.9 Triplet APO Imaging Package

US$1,018.73
SKU:
WO-A-F71GT-AP-2018
Condition:
New
Shipping Weight:
5.00 KGS
Availability:
Accepting order
Shipping:
Free Shipping
Quantity:
Share

Product Description

William Optics GT71 APO is a f/5.9 air-spaced triplet FPL-53 apochromat. This package includes a 0.8x Flat6A-II 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-II 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 420 mm
Focal ratio f/5.9
Image circle

40 mm

Back focus

54.8mm with Flat6A-II (adjustable)

Resolution 1.62 arcseconds
Limiting magnitude 11.1
Light gathering power 103x
OTA length

325 mm (contracted)
427 mm (fully extended)

Weight 2.2 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.

Via FedEx International Economy. Arriving in 1-5 working days.

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.

Quality Control

Scratches   Width no more than  0.025 mm
 Total length no more than  1/4 of total lens diameter. No more than 3 individual scratches
 Dots or spots   Diameter, no more than  0.4 mm
 Quantity no more than  3
 Accumulation of defects   Limited area  0.8 mm2
 Total area of scratches and points no more than  5.8 mm2

 

 

 

 

 

 

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