Sometimes I press the shutter button of my Eos M5 and it just. won't. take. a. photo.

I know there are some 'obvious' reasons for the camera to refuse taking a picture, like having not enough light for the AF to work.

Right now I have a manual Samyang lens mounted configured in SCN/HDR mode and when I try to take a picture and this damn camera won't let me..

In fact currently only P/M/Av and Tv modes let me take pictures.

I've searched all the menu several times now in the hope to find some funny configuration like the shutter button being deactivated by some troll - but without luck.

What are the preconditions for taking pictures I have to check in doubt?

  • Light is OK - for testing purposes I try to take a picture of my bright monitor - half-trigger configures 1/250 at ISO 100
  • Aperture is manually set to 1.4
  • Lens generally works on this camera (P/M/Av/Tv modes work fine)
  • Take photo w/o lens is enabled where possible

What else should I check?

The C.Fn. tab in the menu is not available for the modes I can't take pictures in. So maybe shooting w/o lens is disabled there. Might that be possible? What could be the reason for this?!

  • \$\begingroup\$ Scene modes normally means the camera is controlling aperture and it can't do that with a manual lens. Haven't any direct experience of the M5, but that'd be my guess. \$\endgroup\$ May 30, 2017 at 0:47
  • \$\begingroup\$ I'm surprised that lens works in any exposure mode other than Manual exposure mode. Are you sure the lens isn't communicating anything at all to the camera? \$\endgroup\$
    – Michael C
    May 30, 2017 at 6:51

2 Answers 2


The scene modes require the camera to be able to communicate with the lens. If the camera doesn't detect a lens it won't release the shutter in the scene modes.


Only M and Av modes should actually work with a manual lens. P and Tv shouldn't, since those might require aperture adjustment. If you have a chipped adapter, there might be a problem in terms of how the chip fakes being an EOS lens; the camera may be expecting some communication that the lens/chip isn't capable of sending (e.g., focus distance or something).


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