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Telescopes > William Optics > Gran Turismo > William Optics Apochromatic refractor AP 71/420 Gran Turismo GT 71 OTA
Product no.: 64131

Apochromatic refractor AP 71/420 Gran Turismo GT 71 OTA

RRP: $ 1,510.00 Our price:
$ 1,290.00 incl. VAT, plus shipping costs
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Product description

More about the series Gran Turismo...

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 objects 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:

These new focus masks made from optical acrylic glass provide 92% transparency.

The imprinted pattern provides a diffraction structure which is around three times brighter than classic metal masks. The acrylic glass masks therefore produce a clearer diffraction pattern and enable focusing with the help of fainter stars.

It not only matters which telescope you buy but also where you buy it. Our additional services:

  • We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
  • We provide a copy of the 80-page Telescope ABC beginners handbook with every telescope.
  • We also provide an edition of the exciting astronomy magazine, “Sterne und Weltraum” with each telescope.

Specifications

Optics


Type
Refractor
Type of build
Apochromat
Aperture (mm)
71
Focal length (mm)
420
Aperture ratio (f/)
5,9
Resolving capacity
1,94
Limit value (mag)
11,1
Light gathering capacity
100
Max. useful magnification
142
Tube weight (kg)
2,2
tube diameter (mm)
82
dew cap diameter (mm)
92
Carrying length (mm)
325
Tube length (mm)
427
Coating
SMC multi-coating
Stray light baffles in the OTA
yes
lens design
Triplet

Focuser


Type of build
Gear rack
Connection ( to eyepiece)
2
Free aperture (mm)
64
Ring clamp
yes
Gear reduction
1:10 Fine movement

Mount


Type of build
OTA
Mounting type
no mount

Included accessories


Finder scope
no
Dew Shield
yes
Deviating optics
no
Eyepiece adaptor
1,25" - 2"
Prism rail
Vixen-Style
Miscellaneous
Bahtinov focus mask
Carrying handle
yes
Carry case
yes

General


Series
Gran Turismo
Colour
gold

Area of application


Astrophotography
yes (very good)
Moon & Planets
yes
Nature Observation
no
Nebulae & galaxies
yes
Sun
no (Only with appropriate Sun filter)

Recommended for


Beginners
no
Advanced
yes
Observatories
no

Recommended accessories

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Telescope accessories > Transport & storage (6)
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Telescope accessories > Other (4)
Finder

William Optics Red dot finder with quick-release bracket and base

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Eyepieces (5)
Eyepiece

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Eyepieces > Other (8)
Reticle eyepieces

Omegon Reticle eyepieces Illuminated crosshair eyepiece, 12.5mm

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Filters > Moon filters & Polarizing filters (4)
Filters

Omegon Filters Moon filter 1.25"

$ 19.90*
Filters > Nebulae filters (8)
Filters

Omegon Filters Nebula/ city light filter 1.25 ''

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Filters > Other (2)
Filters

Omegon Filters Color filter set 1,25'' (6 pieces)

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Astrophotography > Camera adaptor (4)
Projection adapter

Omegon Camera adapter 1.25"

$ 24.90*
Astrophotography > Camera mounts (4)

Omegon Easypic Universal Smartphone Adapter

$ 129.00*
Astrophotography > Guiding (4)
Guidescope

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Astrophotography > Other (2)

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Observatories (1)

Omegon Tent observatory

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Media (2)
Star chart

Omegon Star chart Planisphere

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Outdoor (2)
Headlamp

Omegon LED headlamp

$ 13.90*
Astronomy (2)

Omegon 2'' - 1.25'' Twist-lock adapter

$ 79.00*
Globes & Maps (1)
Continental map

Oculum Verlag Sky Quality Map Europe

$ 18.90*
Solar Observation (2)

Baader Sun filter foil 20 x 29 cm

$ 31.90*
Maintenance & Cleaning > Lens cleaners (3)

Omegon 7-in-1 lens cleaning set

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Maintenance & Cleaning > Other (2)

Omegon microfibre cleaning cloth 20cm x 20cm

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*All prices include VAT plus shipping costs.

William Optics Apochromatic refractor AP 71/420 Gran Turismo GT 71 OTA
Original William Optics
William Optics Apochromatic refractor AP 71/420 Gran Turismo GT 71 OTA
Bahtinov focus mask
William Optics Apochromatic refractor AP 71/420 Gran Turismo GT 71 OTA
Adjustment range
William Optics Apochromatic refractor AP 71/420 Gran Turismo GT 71 OTA
Carry case

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