GSO focuser 3" M-R&P-LRC (SKU: DW455)

GSO 3" M-R&P-LRC-C focuser with rotator (GSO, SKU: DW455) is designed for Ritchey-Chrétien telescopes. The rack-and-pinion mechanism with a linear bearing and a 10:1 fine focus control provides coarse and fine focusing. The rotator allows the orientation of attached accessories to be adjusted when framing images.

Unscrewing the rotator exposes an M82 × 1 male thread at the end of the drawtube. The rotator attaches to it via an M82 × 1 female thread and provides an M56 × 0.75 male thread on the camera side. The included 2" accessory holder and 1.25" adapter allow the use of accessories with barrels in these sizes.

Key features

• rack-and-pinion focusing mechanism with a linear bearing
• dual-speed focusing with a 10:1 fine focus control
• rotator with a position lock for image framing
• choice of threaded connection with or without the rotator
• provision for fitting a ZWO EAF motor, available separately

Included items

• focuser: GSO 3" M-R&P-LRC-C with rotator
• accessory holder for 2" barrels
• adapter from 2" to 1.25"

Technical specifications

• model: M-R&P-LRC-C
• manufacturer code: DW455
• nominal focuser size: 3"
• focusing mechanism: rack and pinion with a linear bearing
• fine focus reduction ratio: 10:1
• thread at the end of the drawtube with the rotator removed: M82 × 1, external (male)
• rotator input thread on the focuser side: M82 × 1, internal (female)
• rotator output thread on the camera side: M56 × 0.75, external (male)
• rotator rotation range: 360°
• barrel connections: 2" and 1.25" when using the included adapter

The combination of fine focus control and a rotator makes it easier to set focus and frame orientation, while the two available thread standards allow the imaging equipment connection to be selected to suit the setup.