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Astronomy > Telescopes > William Optics > Gran Turismo > William Optics Apochromatic refractor AP 81/478 Gran Turismo GT 81 Gold OTA
Product no.: 59282

Apochromatic refractor AP 81/478 Gran Turismo GT 81 Gold OTA

$ 1,490.00 incl. VAT, plus shipping costs
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Product description

More about the series Gran Turismo...

The new 2018 GT81 three-element super APO offer superb quality for imaging and visual use at an affordable price!

From the pristine white finish on the CNC to the elegant trim which has more than just good looks...

Optically Unbeatable

  • Triplet air-spaced objective (FPL-53) in adjustable CNC machined ultra high precision lens cell
  • Extremely sharp
  • Excellent color correction
  • Each lens is Fully Multi-Coated with a special super-high transmission coating (STM Coating) on all surfaces
  • Ideal for astrophotography

2.5” R&P-Focuser

  • Very robust focuser with 1:10 dual speed: a treat to use during astrophotography
  • No image shifting!
  • Heavy duty: perfect for your accessories

Simply Beautiful Finish

  • Pure William Optics quality fit and finish: powder-painted white CNC-machined aluminum tube, gold trim finish, retractable dewshield, dewshield cap
  • Top quality anodizing
  • Very compact for carrying on flights

Standard Package:

Mounting Rings, Guiding Rings Dovetail Plate, 2.5” R&P Focuser, innovative Bahtinov Mask Cover (Patented), Soft Carry Case

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
Aperture (mm)
81
Focal length (mm)
478
Aperture ratio (f/)
5,9
Resolving capacity
1,70
Limit value (mag)
11,3
Light gathering capacity
130
Max. useful magnification
162
Carrying length (mm)
390
Tube weight (kg)
3,84
Tube construction
Full tube

Focuser


Type of build
Gear rack
Free aperture (mm)
64
Gear reduction
1:10 Fine movement
Adjustment range (mm)
94
Connection ( to eyepiece)
2

Mount


Mounting type
no mount
Type of build
OTA

Included accessories


Carry case
yes
Tube clamps
yes
Guide scope rings
yes
Miscellaneous
Bahtinov focus mask
Dew Shield
yes
Deviating optics
no
finder base
without
Prism rail
Vixen-Style
Eyepiece adaptor
1,25" - 2"

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

Media (2)
Star chart

Omegon Star chart Planisphere

$ 14.90*
Outdoor (2)
Headlamp

Omegon LED headlamp

$ 13.90*
Astronomy (1)
Filters

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

$ 69.00*
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

$ 19.90*
Maintenance & Cleaning > Other (2)

Omegon microfibre cleaning cloth 20cm x 20cm

$ 4.90*

*All prices include VAT plus shipping costs.

William Optics Apochromatic refractor AP 81/478 Gran Turismo GT 81 Gold OTA
Focusing Mask
William Optics Apochromatic refractor AP 81/478 Gran Turismo GT 81 Gold OTA
Apochromat Triplet
William Optics Apochromatic refractor AP 81/478 Gran Turismo GT 81 Gold OTA
Carrying bag included with product contents

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