Frank Basile Loc: Hudson Valley NY

I do not know if this has been asked before but when using the Sigma 70-200 on my D750 I am not getting sharp images. Is there a way to fine tune the lens to this particular camera?

Steve DeMott Loc: St. Louis, Missouri (Oakville area)

Check out Steve Perry's website. There's a video on AF fine tuning.
https://backcountrygallery.com
Also his book on Nikon autofocus is outstanding.

Hope this helps

camerapapi Loc: Miami, Fl.

Before you fine tune the lens make sure there are no operator's error. It does not hurt to contact Sigma.

Drbobcameraguy Loc: Eaton Ohio

I agree completely with the quoted post. Steve's book on Nikon metering is also worth a read. I read somewhere in the last week or so that some of the Sigma 70-200s were soft. I have a 150-500 that was OK but not sharp as I prefer. I sent it to sigma and told them I was using it on a D7200. When I got it back I was impressed. Might be worth a shot. The service was outstanding and it was only gone a little over a week total. I believe they had it 2 days from the time they received it. Good luck.

47greyfox Loc: on the edge of the Colorado front range

Did you get the Sigma dock when you bought the lens? If so, there is a focus calibration procedure available on the Sigma website. It’s worth a call to Sigma support. The value recommendations are sometimes different. Else your camera manual should have a procedure. If all fails, Sigma will do it for you. Free if still under warranty.

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

Post a sample image.

Which version do you have?

If you have the current Sport model, you can fine tune the lens to the camera using the optional dock. If you have an older version, you can send the camera and lens to Sigma and they will adjust the lens to the camera.

If you use your lens at a particular distance and focal length more than others, you can use the AF Fine tune in the camera to zero in on best performance for that combination of distance and focal length. Be advised that the AF Fine tune is just a simple focus offset - affecting the AF performance at all focal lengths by the same amount. This is important because AF errors are not consistent - you can have a lens that front focuses, back focuses and is focusing just fine - depending on distance and focal length. AF Fine Tune only addresses one of the myriad combinations. If you suspect an issue with a lens, and your other lenses are fine with that camera, then you need to get the lens addressed.

AF Fine Tune is NOT a silver bullet - but more of a placebo. Yes you can spend a few hours optimizing AF accuracy, say, at 200mm and 40 ft, with AF Fine Tune, but you WILL change everything - and your lens may no longer focus at infinity, etc.

The ability to tune a lens at 3 or 4 focal lengths and at 3 or 4 distances using the dock is a far better approach and you will be happier with the results.

The older lens should have good to excellent center sharpness, with poor to average edges and corners at 200mm and larger apertures. The newer lens will be better optically overall.

cjc2 Loc: Hellertown PA

I agree 110% with Gene's reply. Additionally, I am a fan of Sigma's ART series lenses as well as some of their Sport series. I do not personally consider the older stuff, or the Contemporary to be really good. I do own a two Sigma ART lenses and have owned several others. Best of luck.

Zeke4351 Loc: Kentucky

Have you used the lens on other cameras with good results?