I have received a C-mount adapter from you, but it does not fit the C-mount connection on my microscope.
It is, of course, possible, that we have made a mistake with the delivery, so first of all please check that you have actually received a C-mount adapter from us. You will be able to see this from the brass coloured ring (see photo) which bears the C-mount thread
If the C-mount adapter is ok, then the problem could be with the C-mount connection on the microscope you are using. This is critical for being able to attach the LM digital adapter. The C-mount connection thread conforms to international standards. It has the following dimensions: M 25,4 x 0,75 bzw. 1" x 32G /"
It is essential that the C-mount connection has a factor of 1x and does not have any inbuilt optics.
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New LM Digital Adapter for: Nikon Z9 / Nikon Z8 / Nikon D6 / Nikon Z6 / Nikon Z6II / Nikon Z7 / Nikon Z7II / Nikon Z5 / Nikon Z50 / Nikon Z30 / Nikon Z fc / Nikon D850 / Nikon D780 / Nikon D5 / Nikon D4s / Nikon D4 / Nikon D750 / Nikon D500 / Nikon D810 / Nikon D800 / Nikon D800E / Nikon Df / Nikon D610 / Nikon D600 / Nikon D7200 / Nikon DS-Qi2 (Microscope Camera) / Nikon D3x / Nikon D3S / Nikon D7100 / Nikon D7000 / Nikon DS-Ri2 (Microscope Camera) / Nikon D7500 / Nikon D700 / Nikon D3 / Nikon D5500 / Nikon D5200 / Nikon D5300 / Nikon D300 / Nikon D3500 / Nikon D3400 / Nikon D5100 /