01-28-2023 02:58 PM - last edited on 01-28-2023 03:08 PM by Danny
hi i just bought a canon eos dslr body and i also bought a sigma lens that is for canon. the lens doent fit at all. it doesnt even have the pins that connect with the camera.. and my camera isnt turn on and i tried everything , and i read that my canon wont turn on without the lens on. Can u help me and reply to ant of this??
01-28-2023 03:39 PM
Hi and welcome to the forum:
Sorry to learn are having issues. Can you please advise what camera model you have purchased? It would also help to know the model of Sigma lens you have.
Normally, a camera will turn on without a lens attached, so I am not sure why your one does not do so... Was this a new camera, or did you purchase is second-hand.
If you bought a Sigma lens for Canon, it is almost certainly an EF mount lens - and that will work with all current DSLRs. So, as long as the camera IS a DSLR and not a mirrorless one, it should fit and work.
01-28-2023 03:57 PM
What model camera did you buy. Please give us the full name. Canon makes DSLRs and Mirrorless cameras. Your camera WILL turn on without a lens no such limitation exists.
Current Gear: EOS 5D Mark IV, EF 16-35mm F/2.8L III USM, EF 24-70mm F/2.8L II USM, EF 50 F/1.8 STM, EF 85mm F/1.8 USM, EF 70-200mm F/2.8L IS III USM, 430EX III-RT, 470EX-AI & 600EX II-RT
Retired Gear: EOS 40D, Sigma 17-50mm F/2.8 EX DC OS HSM & EF 28-135mm F/3.5-5.6 IS USM
01-28-2023 09:28 PM
If the lens doesn't have pins/contacts that connect to the camera, you have an old lens for manual-focus film cameras, not for Canon EOS autofocus cameras. What is the exact name on the lens?
01-29-2023 03:46 AM
Unfortunately, saying that a lens "is for canon" is nowhere enough. Canon (like all camera manufacturers) has multiple lens mounts, and to get a lens that works on your camera, you need to know the actual lens mount of the camera, and of the lens, and make sure they match.
It's not possible to get more specific until you actually tell us what lens and camera you have. But you say that the lens doesn't have electronic contacts, so you may have an old FD-mount lens. If your camera is EF-mount, then that won't work, and as far as I know there is no adapter. On the other hand Sigma does make all-mechanical EF-mount lenses.
As for the camera not turning on -- is it broken? Is the battery charged? It should certainly turn on without a lens, and depending on the camera, there should be a menu option to set it to take pictures with no lens attached (this is for when you use an all-mechanical lens).
I wrote an article which explains lens compatibilitiy issues, if you're interested: https://moonblink.info/MudLake/gear/lenses
01-29-2023 11:58 AM
Just so you know, There ARE readily-available and cheap FD-to-EF adapters, requiring full-manual control.
01-29-2023 12:04 PM
Since FD's flange distance is shorter than EF, I think those are all diopter adapters (i.e. they have a lens in them). I kind of discount them 'cos what I've heard is that diopter adapters are pretty poor quality. Do you have other info? I'd love to hear it.
01-29-2023 12:33 PM
I didn't RECOMMEND them, and you sure can dismiss them entirely. But you said you were unaware of their existence. That was my only point.
02-18-2023 04:31 AM - last edited on 02-18-2023 09:37 AM by Arthur
It's possible that you have purchased a Sigma lens that is not compatible with your Canon DSLR body. The pins on the lens are necessary to connect with the camera and allow for proper communication and functionality. If your camera isn't turning on, it could be because it's not detecting a compatible lens attached.
To resolve this issue, you should double-check that the Sigma lens you purchased is specifically designed for Canon DSLR bodies. You can do this by checking the lens mount type and comparing it to the mount type on your camera body.
If you find that the lens is not compatible, you will need to return it and purchase a lens that is compatible with your camera body. If you're unsure which lens to choose, you can consult with a knowledgeable salesperson or do some research online to find a lens that meets your needs and is compatible with your camera.
If your camera still doesn't turn on even when a compatible lens is attached, there may be another issue at play. In that case, it's best to contact Canon customer support or take your camera to a professional camera repair shop for further assistance.
03/30/2023: New firmware updates are available.
EOS 1DX Mark III- Version 1.7.1
Speedlite EL-1 - Version 1.0.2
03/30/2023: Product Advisory for EF50 F1.2 L USM
03/30/2023: Product Advisory for EOS R10
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM
Canon U.S.A Inc. All Rights Reserved. Reproduction in whole or part without permission is prohibited.