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I just got a 500-1000mm lens by Opteka and it came with a T-Mount but whenever I put it on it says “No Lens Attached” and I googled the problem and it said I had to enable “Release shutter w/o lens” but I have looked EVERYWHERE in my rebel t7. Even the custom options but I don’t see that option ANYWHERE. I am LOST. Where do I find this stupid option??? Also I should mention i’m new to cameras and photography:) Another also, I like to do landscape / moon photography that is why I bought telephoto lens!

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  • \$\begingroup\$ idk Canon, but on my Nikon, you can use non-electronic lenses by setting the camera to full manual. It then ignores whether or not it thinks a lens is attached. i.stack.imgur.com/2KLeD.jpg vs i.stack.imgur.com/VUsQh.jpg \$\endgroup\$
    – Tetsujin
    Dec 9, 2023 at 8:25
  • \$\begingroup\$ My Canon doesn’t have that option and someone else told me that I would probably have to get a t-mount that can detect the lens when attached to the camera. Thank you for your advice though! \$\endgroup\$
    – AxG7
    Dec 9, 2023 at 9:41
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    \$\begingroup\$ @Tetsujin, for Canon probably it depend of the class of the camera because I can make a photo with 5D Mark III and 700D w/o any problem (w/o a lens) \$\endgroup\$ Dec 9, 2023 at 10:16
  • \$\begingroup\$ Do you have the T7 set to Manual exposure mode? You must have any Canon EOS camera set to Manual exposure mode to use the "Release shutter w/out lens" feature. \$\endgroup\$
    – Michael C
    Dec 10, 2023 at 2:11

2 Answers 2

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All Canon EOS Rebel cameras (all Canon DSLRs) were designed to shoot without a lens attached. There is no need for a menu option to allow “shooting without a lens”.

If you have the camera in Video mode, you will get a message: “Insure a lens is attached”, but you will still be able to start taking a video without the lens. Many Canon DSLRs also allow taking photos while in Video Mode.

enter image description here

If your camera actually has a “no lens attached” message, and will not shoot, then that must be a new “feature” Canon has added to the firmware of the T7.

An AF Confirm Chip will trick the camera into seeing a lens that is not there, and will allow you to shoot. You can add one to the lens mount, or buy a new T mount adapter with one already installed.

enter image description here

The T7 is a very basic, beginner camera, missing a lot of features that other cameras normally have. You seem to have progressed far beyond the “beginner” stage, so it might be good time to upgrade your camera.

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Unfortunately I do not see in camera manual the option to make photos without a lens.

Probably if you use T-Mount to EF-S adapter with chip you can inform the camera you have lens attached.

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  • \$\begingroup\$ Hmm ok! Could you maybe link me a T-amount to EF-S adapter? Because i’m looking online but I’m not really sure which one to get and which one has a chip or not. \$\endgroup\$
    – AxG7
    Dec 9, 2023 at 9:31
  • \$\begingroup\$ @AxG7, here is one example: amazon.com/Fotodiox-Adapter-Compatible-T-Mount-Camera/dp/… To be sure you have chip check for existence of pins on lens adapter. \$\endgroup\$ Dec 9, 2023 at 9:33
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    \$\begingroup\$ Ohhh ok, Thank you! My moonshots will be amazing 🤩. \$\endgroup\$
    – AxG7
    Dec 9, 2023 at 9:37

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