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William Optics GranTurismo 81/478 APO IV Gold OTA

 1.890,00

This is just the tube (OTA), without mounting and tripod. You can choose the appropriate mounting and the accessories that come with it below.

William Optics GranTurismo 81 IV Gold: FPL-53 triplet apochromat 81/478 f/5.9 in gold finish. Delivered with Vixen dovetail, handle, Bahtinov mask, adapter, and carrying case.

In stock, delivered within 2 to 4 business days
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William Optics GranTurismo 81/478 APO IV Gold OTA
William Optics GranTurismo 81/478 APO IV Gold OTA
 1.890,00

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  • Customer reviews us with a 9,4
  • 30 day return period
  • Pay in terms
  • Advice from stargazers, via WhatsApp, in the showroom or by phone
  • Each box with own track & trace
  • Showroom in Sneek, Come and see us by appointment

GranTurismo 81 IV in gold: a triplet for the traveling photographer

The William Optics GranTurismo 81 IV Gold is the light, travel-friendly triplet that delivers truly premium-quality images. The FPL-53 triplet design keeps colors tightly together, ensuring photos remain calm, bright, and sharp, from star fields to the Moon.

William Optics GranTurismo 81 IV Gold apochromatic triplet refractor, full-frame
De GranTurismo 81 IV Gold with handle and dovetail

Stable and immediately deployable

With an 81 mm aperture and 478 mm focal length (f/5.9), the GT81 combines imaging scale with travel weight. The Bahtinov mask allows for precise focusing, the handle with Vixen dovetail mounts the tube to the mount in seconds, and the soft carrying case provides protection on the go. It's also a visual pleasure, via the 2-inch to 1.25-inch adapter.

In the box

  • Optical tube GranTurismo 81/478 IV triplet, gold finish
  • Vixen-Style dovetail
  • Handle
  • Bahtinov mask
  • 2 inch to 1.25 inch adapter
  • Soft carrier bag

Featured accessories

The William Optics Flat GT flattener (329 euro) flattens the field to full-frame; the UniGuide 32 mm guidescope (159 euro) enables long exposures.

For whom yes, for whom no

Ideal for astrophotographers who want triplet quality in a golden finish, mobile and versatile. Not for those who want to rotate composition without detaching the photo train; the GT81 WIFD has a built-in rotator for that.

Specifications

Optical designApochromat, FPL-53 triplet
Opening81 millimeters
Focal length478 mm
Opening ratiof/5,9
Focus assistBahtinov mask
AttachmentVixen-style dovetail with handle
ExecutionOTA (empty tube), Gold

Unsure about the right tube for your camera and mount? The telescope selection aid helps you choose. Also view all Refracting telescopes and the full range of William Optics.

Additional information

Weight3,9 kg
Dimensions55 × 28 × 28 cm
Telescope Electronics

Tube only (OTA).

Mounting Type

OTA (without mount)

Optics Design

ED refractor / APO

Optics Focal length

300 - 600 mm

Eyepiece mount

2 inches

Focal Ratio

f/6

Aperture

70 - 100 mm

Observation goals

Moon and planets, Astrophotography

Weight

Lightweight (0 - 5 kg)

Max. useful magnification

150x - 200x

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