Rusan Q-R adapter M52x0.75 for Ø59 mm (ARM52-59)

What it is and what it does

The Rusan ARM52-59 is a clamping Q-R adapter intended to mount night-vision and thermal clip-on devices that feature a M52x0.75 mounting thread onto the outer tube of an objective with an exterior diameter of 59 mm. It provides a secure mechanical interface between the clip-on device and the optics tube.

Key characteristics

Belonging to the ARM52 family, the adapter fits devices with an M52 x 0.75 thread. The clamp diameter for this reference is 59 mm and the clamping adjustment is approximately ±0.2 mm. It includes a quick-release lever and an adjustable clamping force. Construction uses aircraft-grade aluminium and a special internal material for enhanced grip. Typical overall length for standard sizes is about 48 mm with a clamping length near 37 mm; wall thickness was reduced to 2.0 mm after the 2017 revision. The product weight is 0.164 kg.

Compatibility

Compatible with clip-on devices that use an M52x0.75 thread; examples Dedal, Jahnke and Lahoux. The adapter can also be used with reduction rings for other brands (e.g. Pulsar, ATN, Dipol) when appropriate reducers are employed.