Question about Nikon D3100 Digital Camera
I Have a Sigma 70-300 AF, Macro DG lens but the issue is that it keeps telling me to lock the aperture ring even though it is locked on the highest number
Does this only happen with this lens? If other lenses work OK, then the problem is in the lens. If it happens with all lenses then it is in the body.
Try cleaning the contacts on the back of the lens and in the body mirror box with a Q-tip lightly saturated with alcohol.
How old is your lens? It may have a conflict with the newer camera body. Did it work right before?
Posted on Aug 01, 2013
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Posted on Jan 02, 2017
You have to make sure you bought the sigma lens with a NIKON mount. Sigma makes a Sigma mount as well as a Canon mount, of course neither of those mounts will work with your camera. Also you must also make sure your lens is the Sigma 70-300 HSM (/Hyper Sonic Motor) or it will not AF on the D40. I just bought this lens from Abes of Maine and I love it on my D40.
Posted on Jul 28, 2009
SOURCE: sigma 18-300mm lens
The problem may be with the sigma's aperture ring. Try this:
- Turn camera off
- Turn the aperture ring clockwise and lock it
- Turn camera on
If this does not solve the problem, do it again but turn it counter-clockwise
Posted on Jan 04, 2010
Testimonial: "thanks for the advice camera now back in working order. thanks again."
Have you tried formating the memory card? R07 means it has 7 shots in internal memory. Since you have already pressed the reset through the small hole in the front, if formatting the card does not work, try downloading the latest firmware from Nikon and installing it.
Posted on Mar 22, 2010
Testimonial: "thank's for your quick reply, i'v reformated and installed latest firmware still noththing as i say it was fine till i changed len's, Cheers Bob"
You must lock the aperture ring to f/22, so the camera can engage the aperture adjustment lever on the lens. Then, you can change the aperture with the command wheel.
When you change the aperture with the command wheel the aperture ring on the lens doesn't move when the camera actually adjusts the lens aperture.
Take the lens off and locate the aperture adjustment lever on the lens mount.
Unfortunately, this won't work with older AF lenses. So if you are using an older lens, the only thing you can do is change the camera setting to M (Manual) to adjust the aperture on the lens yourself.
Posted on May 16, 2011
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