William Optics GT 71 Triplet Air-Spaced
- 71 mm Aperture f/5.9 Imaging Refractor Telescope
- Triplet w/ FPL-53 glass for Apochromatic performance
- Covers full frame imaging circle (44 mm)
- 2.5" Dual-speed WO R & P Focuser
- Colors: White w/ Gold Trim
- Includes: 2 Mounting rings, 2 Guiding Rings
- Weight: 2.2 kg (4.85 lb)
- Includes Dust Cover with built-in Bahtinov Mask
- Adjustable/Retractable Dew Shield
- Vixen style Dovetail Plate
- Objective is Zygo Interferometrically tested
- Printed Interferometer Report is available at extra price
The William Optics GT 71 APO Telescope is a high quality Apochromatic Imaging and visual use telescope with an aperture of 71 mm and a focal length of 420 mm or an f-ratio of f/5.9. This GT 71 APO Telescope from William Optics can be used with a camera mounting system, with various T-mounts for cameras (not included), or equally well as a visual observing instrument. Features a top-quality triplet air-spaced objective, designed by a leading designer with FPL-53 glass. The telescope utilizes precision optics with STM coatings. This GT 71 APO telescope is extremely sharp and has great color correction, ideal for astrophotography.
You will be astonished by the images you get. If you wish to take great astro-images with a high quality APO refractor, this William Optics GT 71 APO Telescope is the convenient way to achieve your imaging goals, with its focal length of 420 mm. Its FPL-53 glass air-spaced Triplet lens design provides images with extreme sharpness, clear details, with APO color correction. Just as great for doing visual observations. This William Optics GT 71 APO Telescope will be an attraction and a hit at every star party you attend.
Incorporates the 2.5" WO Rack & Pinion heavy duty focuser, which is ideal to use with astro-imaging, providing ideal focusing ability with no image shift. The 71 mm objective is a great size for both wide-field and planetary visual observations, and its apochromatic performance makes it ideal for imaging. This is a do-it-all telescope. And it is small enough to take with you when you travel and carry aboard airline flights.
New for 2019: Now, when you purchase this GT 71 APO Telescope from William Optics, you will be assured that the optical performance of this telescope achieves a Strehl Ratio of > 0.92 (Strehl) because they are testing each optical system on a Zygo Interferometer to confirm that performance specification. In addition, each telescope is star tested by William Optics professionals to guarantee the ultimate in optical performance. A printed report of the Zygo testing results is available at extra cost.
The GT 71 APO Telescope from William Optics incorporates the finest triplet objective with a new FPL-53 center element. This stunning William Optics Gran Turismo (GT) 71 APO telescope is the "jewel" of the APO refractor industry. It has a beautiful white powder coated finish with elegant gold trim and the best optics and a superior focuser, so it has more than just good looks.
Includes dual Mounting rings and 2 Guiding rings, 2.5" Dual-speed WO R&P Focuser which is 360° rotatable for convenience, Vixen style Dovetail Plate, 1.25" - 2" Adapter, and the new innovative Bahtinov Mask cover. It can be used visually or with digital cameras, and is compatible with a Field Flattener (optional purchase). This telescope package also includes a premium soft Carrying Case for storage and transportation.
Introducing a first innovative feature in the industry: Now this GT 71 APO Telescope from William Optics comes standard with a dust cover that has a built-in, clear Bahtinov Mask for perfect focusing every time. Simply remove the flat front cover plate, leaving the dust cover cuff in place on the telescope. Point the telescope at a bright star, and focus carefully. When the bright central diffraction spike looks exactly centered between the other two spikes forming an "X", then your telescope is in exact focus for stars. Remove the dust cover cuff carefully from the objective end of the telescope, and you are ready to image.
|Telescope Type:||Triplet Air-Spaced Apochromatic Refractor|
|Objective Aperture:||71 mm|
|Focal Length:||420 mm|
|Strehl Ratio Guaranteed:||> 0.92|
|Focuser:||2.5" Dual-Speed WO R&P Focuser|
|Camera Connection:||360° Rotatable|
|Resolving Power:||1.62 arcsec|
|Tube Color:||White W/ Gold trim|
|Tube Length:||325 mm (Fully Retracted); 427 mm (Extended)|
|Tube Weight:||2.2 kg (4.85 lb)|
|Compatible With:||1:1 Full Frame Flattener|
|T-Mount:||Interchangable T-Mount; Includes a 1.25" - 2" EP Adapter for the Focuser|
|T-Rings:||None, T-Rings are available as optional accessories|