wsa111 Loc: Goose Creek, South Carolina

My Nikon D7100 now rejects the Sigma 18-250mm lens. This just started when i removed it to swap in another lens. I reinstalled the lens & now the camera rejects it.
I tried the lens on a D7000 & it performed fine. I even tested it on my D7500 & it works fine.
I installed a Sigma 18-300mm from another camera & it focuses fine works to perfection.
I cleaned the contacts on the lens & still no good. I am not hearing the OS on this lens working. If i mount it on another camera i can hear the OS running????

Haydon

See if cleaning the contacts with isopropyl and a micro fibre might help on both the body and lens. Do not use a pencil eraser.

Harry0 Loc: Gardena, Cal

And turn it off, remove the battery, then clean it.
Then put the lens on, insert battery, turn camera on.
Sometimes they just need a little reboot.
Some folk here swear they can exchange the lens with the camera on, no probs. Mine- no.

wsa111 Loc: Goose Creek, South Carolina

Tried all of the above. The D7100 still rejects the Sigma 18-250mm?? I guess i will just go with the 18-300mm lens.
The 18-250mm works fine on any other camera??

Zachary Welch Loc: Minneapolis

I was having issues with one of my Sigmas. I sent it in for a firmware update and it worked great after.

Zachary Welch Loc: Minneapolis

I was having issues with one of my Sigmas. I sent it in for a firmware update and it worked great after.

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

It is a shame that your Sigma still is not working. I am sure the Nikon 18-300 would still be working on your D7100.
This is not uncommon for a Sigma lens as Sigma makes mounts for several camera's and there fore is not made for an exact camera manufacture. This does lead to malfunctions as you have described. Sorry for your troubles.

camerapapi Loc: Miami, Fl.

An easy solution would be to check with Sigma. I bet they have the answer.

david vt Loc: Vermont

I picked up a used 50-150 Sigma (2nd Generation) for my D7200. Had a weird quirk in that it would AF fine in viewfinder, but not in Live View.

Called Sigma. They took it back, updated the firmware, and sent it back. Repair was free (even on this very old lens) and they even paid for the return shipping. Works great now.

Go to their website and file a service question with them. I, in my one experience with them, found them to be quite helpful.

Good luck

olemikey Loc: 6 mile creek, Spacecoast Florida

I have the D7100 and the Sigma 18-250 DC OS HSM Macro, works like a champ on my Nikon bodies (back and forth on D7100 and D90, used to have a 3200, worked good). If you feel you've done all you can, call Sigma.

Will say this - with several lens body combinations, when battery power drops below 20-25%, I've run into situations where camera and lens were not communicating/functioning just as they should.

My theory is that with an older battery, or one that is not as robust at the tail end of useful charge power range, some functions might become sluggish or fall off/fail to complete, due to lack of enough current/amperage to start or to complete a function. Cleaning contacts always helps, but in this case loading in a freshly fully charged battery cured it every time (if memory serves me, I think I've encountered this same situation about 4 or 5 times).

With several of my older lenses (that have IS/OS) I have also encountered dirty switch (OS/IS switch) syndrome - removed the lens mount for better access and cleaned the switch contacts with alcohol 91%. It is easy to do, just carefully remove screws, mount and shims, pop the switch and drip a little 91% into it, work it a few times, air dry and reassemble. If you are not sure you want to do it yourself, send to Sigma, or lens repair facility.

Since it works well with other bodies, I'm thinking it is a electrical power issue, long distance guess - would be good to know the outcome. Good luck with it.

Chris T Loc: from England across the pond to New England

Most helpful, Mike … I'll bet this is the best piece of advice here. By "91%" you meant Isopropol Alcohol?

Chris T Loc: from England across the pond to New England

WSA - I don't have any advice for you, but Ol' Mikey's suggestion about putting in a freshly-charged battery makes the most sense. I did want to tell you, however, I also have the D7100 and D7000, plus the D5500 and D5300, and the D3200, and also have an assortment of Sigma lenses (as well as Tokina and Nikkor) and have had my Sigma 18-250 OS HSM Macro on every one of them, at one time or another, and have NEVER run into any AF problems with it - regardless of which body it was on. I currently use it on my D5500.

olemikey Loc: 6 mile creek, Spacecoast Florida

Yes "91%" Isopropol Alcohol - I've never had it harm any electronics or optics - But please don't turn on any electrical/electronic device with any kind of wet, it has to dry first, could still short something out if wet, and in rare instances, you could spark the fumes, which would be interesting.... It will also suck out moisture. I have had no issues with my Sig 18-250, but these are the steps I'd take if I did, after cleaning contacts and such, it has worked well on other lenses and bodies, especially those with lots of switches and circuits - every electrical contact point is a potential fail point, especially as devices age, or heavy use, etc. The fully charged versus nearly depleted battery would carry over into any type electrical/electronic devices, same with dirty or corroded contacts.

The battery change has saved the day a few times.

Chris T Loc: from England across the pond to New England

Thought that's what you meant, Mike … yes, I think the suggestion about a freshly-charged battery is the best advice (apart from a thorough cleaning of the contact points) but, also - it should be noted - some third-party batteries (Watson, et al) might not resolve the problem, no matter how freshly-charged they are. Once a lens starts acting up like this - you need to make sure you're using OEM product!!!!

wsa111 Loc: Goose Creek, South Carolina

Thanks for all the replys. As of now i will just leave the 18-250mm on the D7000.
I can also give Sigma a call as recommended.
I will have to see if i ever did a focus check on the D7000 with the 18-250mm.
The D7000 is famous for back-focus.