
Triplet
APO Design
Versatile usage
Ideal for both visual and imaging, compatible with various flatteners and Barlow lenses.
Extra-low Dispersion glass
Contains Extra-low Dispersion (ED) glass, delivering sharp, vibrant images with true-to-life colors while significantly reducing chromatic aberration.
High-precision polishing
Our lenses undergo high-precision polishing, setting a standard of excellence that surpasses industry norms, ensuring optimal performance in all conditions.
Gran-Turismo 71 $856.00 View product |
Gran-Turismo 81 $1,402.00 View product |
Gran-Turismo 81 $1,714.00 View product |
|
|---|---|---|---|
| Lens Type | Triplet APO Prime Lens | Triplet APO Prime Lens | Triplet APO Prime Lens |
| Focal Length | 419 mm | 478 mm | 478 mm |
| Diameter | 71 mm | 81 mm | 81 mm |
| Focal Ratio | f/5.9 | f/5.9 | f/5.9 |
| Image Circle | 44 mm | 45 mm | 45 mm |
| Focuser |
2.5" R&P Focuser
Compatible with EAF |
2.5" R&P Focuser
Compatible with EAF |
WIFD R&P Focuser
Compatible with EAF |
Bundles
[Bundle] Gran Turismo 81 IV & ZWO AM3 Full Package
Sale price$3,204.00 USD
[Bundle] Gran Turismo 71 Astro Imaging Package
Sale price$934.00 USD
[Bundle] Gran Turismo 81 IV Astro Imaging Package
Sale price$1,402.00 USD

![[Bundle] Gran Turismo 81 IV & ZWO AM3 Full Package](http://williamoptics.com/cdn/shop/files/GT-81_ZWOtripod-gold.jpg?v=1724567403&width=2400)
![[Bundle] Gran Turismo 81 IV & ZWO AM3 Full Package](http://williamoptics.com/cdn/shop/files/GT-81_ZWOtripod-gold-2.jpg?v=1724567399&width=2400)
![[Bundle] Gran Turismo 71 Astro Imaging Package](http://williamoptics.com/cdn/shop/files/GT-71_Flat6AIII.jpg?v=1727404357&width=2400)
![[Bundle] Gran Turismo 81 IV Astro Imaging Package](http://williamoptics.com/cdn/shop/files/GT-81-IV_Flat6AIII-red.jpg?v=1721029434&width=2400)
![[Bundle] Gran Turismo 81 IV Astro Imaging Package](http://williamoptics.com/cdn/shop/files/GT-81-IV_Flat6AIII.jpg?v=1721029292&width=2400)