https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Trouble-Adjusting-Aperture-Getting-quot-Select-AF-quot-Msg/m-p/428197#M102422 <P>What camera are you using?</P><P>If a 5d MkIV, is one of these buttons stuck down?</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Screenshot 2023-07-17 094005.jpg" style="width: 504px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/43662iE39BAA191E16B68D/image-dimensions/504x429?v=v2" width="504" height="429" role="button" title="Screenshot 2023-07-17 094005.jpg" alt="Screenshot 2023-07-17 094005.jpg" /></span></P> Mon, 17 Jul 2023 13:42:58 GMT Anonymous 2023-07-17T13:42:58Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Trouble-Adjusting-Aperture-Getting-quot-Select-AF-quot-Msg/m-p/428159#M102409 <P>Hello! I have been shooting with my Mark IV for years, in manual, and just the other day it started giving me the msg "Select AF" when I attempt to change the aperture. It is not the lens, as I have taken it on and off and get the same msg. It is not the lock switch on the back of the camera or on the lens and I have unlocked both. I also have my lens switched to AF on the little switch. It is also not the aperture range setting as mine is currently set 1 - 100. &nbsp;Does anyone know why my camera is telling me to select &nbsp;AF?&nbsp;</P> Mon, 17 Jul 2023 06:34:35 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Trouble-Adjusting-Aperture-Getting-quot-Select-AF-quot-Msg/m-p/428159#M102409 tarinfrantz 2023-07-17T06:34:35Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Trouble-Adjusting-Aperture-Getting-quot-Select-AF-quot-Msg/m-p/428197#M102422 <P>What camera are you using?</P><P>If a 5d MkIV, is one of these buttons stuck down?</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Screenshot 2023-07-17 094005.jpg" style="width: 504px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/43662iE39BAA191E16B68D/image-dimensions/504x429?v=v2" width="504" height="429" role="button" title="Screenshot 2023-07-17 094005.jpg" alt="Screenshot 2023-07-17 094005.jpg" /></span></P> Mon, 17 Jul 2023 13:42:58 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Trouble-Adjusting-Aperture-Getting-quot-Select-AF-quot-Msg/m-p/428197#M102422 Anonymous 2023-07-17T13:42:58Z