William Optics 4 Extension Tube for Flat GT: Custom backfocus for your Flat GT train
This William Optics extension tube brings your camera train to the correct length when working with the Flat GT and lacking backfocus. With 67 mm (2.6 inches) of optical length and M92 threads on both sides, everything is fully screwed together, without play or tilt.
In photography, a geared tripod head is the only route to repeatable sharpness: your camera stays level, your framing holds firm, and corner stars remain round.


Features
- 67 mm (2.6 inch) optical length
- M92 thread on both sides, completely tilt-free
- For achieving the correct backfocus in Flat GT setups
- Rigid, durable construction
Compatibility
For camera trains with M92 connections around the William Optics Flat GT. Measure your required backfocus before ordering.
Specifications
| Optical length | 67 mm (2.6 inches) |
| Thread | M92 on both sides |
You can find more accessories for this brand at the William Optics brand page.





Reviews
There are no reviews yet.