Travel-sized triplet sharpness
The William Optics GranTurismo 71 It is small in size and large in performance. The triplet lens with FPL-53 glass keeps colors tightly together, so stars remain point-shaped and photos are calmer, sharper, and easier to edit. Visually, the triplet also delivers a bright, high-contrast image.
Serious focus, compact tube
The 2.5-inch rack-and-pinion focuser with 1:10 fine adjustment supports heavy camera setups without sagging and sharpens to the micron. With a 420 mm focal length (f/5.9), you can photograph star fields and larger nebulae with true triplet color purity, and the Bahtinov mask allows for precise focusing. Everything fits in the padded transport bag.
In the box
- Optical tube GranTurismo 71/420 triplet
- 2.5-inch rack-and-pinion focuser with 1:10 reduction
- Bahtinov mask
- 2 inch to 1.25 inch adapter
- Vixen swallowtail
- Handle
- Padded transport 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
For astrophotographers who want triplet color correction in a portable tube. Not for those seeking an integrated flat field without a separate flattener; the RedCat 71 has that Petzval system built-in.
Specifications
| Optical design | Apochromat, FPL-53 triplet |
| Opening | 71 mm |
| Focal length | 420 mm |
| Opening ratio | f/5,9 |
| Focuser | 2.5 inch rack and pinion with 1:10 reduction |
| Focus assist | Bahtinov mask |
| Attachment | Vixen dovetail with carrying handle |
| Execution | OTA (loose tube) |
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.
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