Canon eos r5 / telescope

[Xantron]

I have recently got a canon r5 and am trying to take photos though a telescope and the canon is essentially thinks that there is not lens on it and will not take a photo

[admin]

Is there is setting on the R5 that allows you to shoot without a lens?  If yes enable it.

Also, do you have a card in the camera?  If not you need to set your camera to allow it to take photos without card.

Please provide the exact error message you get.

[s3igell]

From another recent Canon MILC Model:

Custom Functions Menu; Tab 4; Release shutter w/o lens.