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How to simply and securely attach the LM digital adapter to phototubes with an internal diameter of 23.2 mm and an external diameter of 25.3 mm using the TUSTB tube adapter 

Many microscopes are offered with phototubes that have an internal diameter of 23.2 mm. If you want to use a digital camera with a microscope of this kind, then you need an LM digital microscope adapter with a 23.2 mm tube connector.

Microscope phototube with 23,2mm inner diameter

The LM digital adapter is inserted into the tube along with the camera. The assembly is then immediately ready to use. The first image shows a digital SLR camera in use; the second image a USB camera in use.

Adapter solution for phototube microsocpe DSLR DSLM

Adaptersolution for 23mm microscope phototube cmount camera

In both solutions, the adapter fits into the phototube and can be rotated manually. For a fixed mechanical connection, we offer another adapter – the TUSTB – as an option. 

adapter 23mm phototube microscope tight

The TUSTB consists of a CNC cut and turned aluminium block and has six Allen head screws. A suitable Allen screw key is included with the purchase of the TUSTB. It connects the LM digital adapter to the phototube of the microscope. By tightening the Allen screws, the adapter can be fastened to the phototube so that no more play (rotation) is possible. 

adapter for phototube microscope parfocality

A further advantage of the TUSTB is that by slackening and retightening the Allen screws, it is possible to slightly raise the LM digital adapter and thus very easily carry out an optical adjustment if the focus of the image viewed through the eyepiece does not match that of the camera image (parfocality).

The advantages of the TUSTB in summary: 

LM adaptersolution microscope phototube



New LM Digital Adapter for: Nikon Z9 / Nikon Z8 / Sony Alpha 7R V / Sony Alpha 1 / Sony Alpha 9 II (ILCE-9M2) / Sony FX3 Cinema Line / Sony Alpha 9 / Nikon D6 / Canon EOS R3 / Canon EOS R6 Mark II / Canon EOS R8 / Sony Alpha 7R IV / Canon EOS R5 / Sony Alpha 7S II / Sony Alpha 7S III / Sony Alpha 7R III / Canon EOS R6 / Nikon Z6 / Nikon Z6II / Sony Alpha 7R II / Nikon Z7 / Nikon Z7II / Canon EOS R / Canon EOS Ra (Astro) / Nikon Z5 / Sony Alpha 7C / Canon EOS RP / Sony Alpha 7S / Canon EOS R7 / Leica SL2-S / Canon EOS R10 / Canon EOS 1D X Mark III / Nikon Z50 / Nikon Z30 / Nikon Z fc / Nikon D850 / Canon EOS 1D X Mark II / Nikon D780 / Olympus OM-1 / Sony Alpha 7III /