RUSAN of Croatia now make an incredible 2.5x Monocular to attach to most thermal imaging devices. The 2.5x Magnification Ocular already includes an adapter to use with Rusan's Modular Connectors - these are unit specific and come in various sizes.

Other than the 2.5x Magnification Ocular with included Adapter, you would need the correct Modular Connector with the corresponding thread size for your thermal imaging unit.

CONNECTORS FOR VARIOUS BRANDS:

These connectors are used with the RUSAN MAR Connector required to mount the appropriate thermal imaging or night vision device.

Please select the appropriate connector from the menu.

If your clip-on device does not have it's own counter nut, you need to buy a counter nut in appropriate thread size, except for these connectors:

You can find these connectors on this link: Rusan Modulaire adapter Koppelstuk – MAR Connector

• MCR-M52: M52x0,75
• MCR-M49: M49x0,75 (Dipol…)
• MCR-M46: M46x0,75 (Nitehog, Electro-optic, Lahoux...)
• MCR-TM35: M44x0.75 (Swarovski tM 35)
• MCR-M33: M33,5x0,75 (Guide, Nitehog Viper…)
• MCR-M35: M35x1 (Pulsar Krypton, Proton...)
• MCR-M35P: M35x1 (Pulsar Krypton, Krypton 2, Proton)
• MCR-CORE-2: Pulsar Core (2 pinnen)
• MCR-PF: Pulsar F455 (4 pinnen)
• MCR-HIK-2: Hikmicro Thunder & Cheetah (en vergelijkbaar)

These above connectors already have a built-in system for orientation of the device, so no need for a counter-nut.

Here's a short VIDEO showing how the 2.5x Ocular attaches to a Leica Calonox Sight unit: