William Optics apochromatic refractor AP 71/420 Gran Turismo GT 71 OTA

William Optics apochromatic refractor AP 71/420 Gran Turismo GT 71 OTA

The Gran Turismo refractor is an apochromatic triplet with FPL-53 element for highest colour purity and strong contrast! A refracting telescope that is versatile and leaves little to be desired.

  • An ideal travel instrument
  • High-quality 3-lens optics
  • Can be used visually and photographically
  • 2.5" focuser with 1:10 gear reduction
  • Supplied with focus mask according to Bahtinov
Manufacturer : William Optics
SKU : WiO-75650
Price: 1000.00 € excl tax
Delivery date : 3-4 days
Product description

The Gran Turismo refracting telescope is an apochromatic triplet with FPL-53 element for exceptional colour purity and high contrast! A versatile refracting telescope which leaves almost nothing to be desired.

  • Visual observation:Equiped with an optional zenith mirror, you can observe the Moon and planets with extremely high contrast using this apochromat. The high-speed apochromat also enables prolonged observation of challenging Deep Sky objects: star clusters, galaxies and nebulae. Due to the pin-sharp depictions of stars, observing and analysing globular clusters is a particular delight.
  • For astrophotography, we recommend William Optics’ Flat6AIII flattener and reducer. The lens also provides an even field with a steady focal position for full-frame cameras. Using the prism rail adapters integrated into the handles, you can fit a guiding scope on your Gran Turismo, which can serve as a finderscope or a guide sleeve.
  • The lower 2.5" R&P focuser has a long focusing path, reduction and a temperature display. An adapter for a 1.25" eyepiece is also included.

The very robust Gran Turismo apochromat really is well-suited for travelling and for mobile astronomy and astrophotography. take the apochromat with you to beneath the dark skies and discover the best lenses from the Messier and NCG catalogues. The telescope is straightforward, stable and your new favourite telescope since the Firstlight!

A further special feature of the new William Optics apochromats is the specially calculated Bahtinov focus mask:

The new Optical acrylic sheet offers 92% of light transmission that gave you the highest and brightest diffraction Spikes for Focusing! It’s about 3 times brighter than traditional metal type.

Scope of Delivery:

  • Optical Tube
  • Eyepiece adaptor 1,25" - 2"
  • Prism rail Vixen-Style
  • Bahtinov Mask
  • Carrying handleyes
  • Carrying bagyes
Products specifications
CoatingMulticoated
Focuser2.5" Rack and Pinion Focuser with 1:10 Micro Focusing
Focal length420 mm
Aperture71 mm
Transportation length325 mm
Focal ratiof/5.9
Connection to eyepiece2" / 1.25"
Tube weight2.2 kg
Dewcap diameter92mm
Tube diameter82mm