Sigma 50 f/1.4 - calibration needed

Hello everyone,

I want to send my Sigma 50 f/1.4 lens in for calibration due to soft focus at wide aperture.

Would it be wise for me to send my Canon 40D camera along with the Sigma lens?
Or sending the 40D is not needed?

And another question is that I bought the lens used from a member here. I also have the warranty card, but it's in the previous owner's name and address.
Will Sigma still honor the warranty work if I have a copy of the receipt (purchase date: 11/23/2009)?

Thanks.

You should really just ask Sigma these questions. Best of luck.

Another Sigma Success - huh?

It's your choice. Sending in the body with the lens might produce better results.

you can use his info...

i had the warranty card blank but the receipt had the previous owners name on it.

all i did was use his name and used my current address. they calibrated mine and sent it back to my house with a package with his name on it

They treat it just as if he bought it and gifted it to you, same as any item such as a computer, Xbox or whatever.

You should send in your body, but make sure you call ahead of time so they know what to expect - also they will give your further instruction.

When they calibrate your lens, they are calibrating it to whatever body they put it on. Just because it is calibrated to one body doesn't mean it will work with yours. (In fact, this could be the problem with your lens.) Your body is different than the body they test it on, so you need to send your body so they can calibrate the lens to the body.

louisp_p wrote in post #13406260
I sent my Sigma 30mm to Sigma to do calibration without my camera body(550D) and come back in perfect condition. Focus right, and sharp at f1.4.

If you need the body during this period, I think send in without the body should be fine

You got lucky.

sending a body aswell so that you can calibrate a lens makes no sense to me. So if you have multiple camera bodies your still gonna have issues. I dislike AF lotteries.

I've just taken my 50mm f1.4 in as it front focuses, that's fine on my 5DmkII and 7D but not for my 5D classic and I didn't want a lens that I could only get full use out of on the mkII (I say full use as in FF/shallow dof optimised). I've left the 5D with them as I don't have any weddings for a few weeks so can manage without. If you don't leave them a body it still might not be spot on for your camera so a wasted job.

sbattey wrote in post #13406263
You got lucky.

Most people send theirs in without the body and get it back fine.

Sirrith wrote in post #13406496
Most people send theirs in without the body and get it back fine.

I would speak to Sigma, well I did, here in the UK they suggested sending in the body so that the lens is calibrated to that rather than just their standard. When working with tight tolerances I would want it right first time.

No need to send the body, include your receipt when sending the lens. I suggest to send it to Sigma NY.

Kuhan wrote in post #13405091
Hello everyone,

I want to send my Sigma 50 f/1.4 lens in for calibration due to soft focus at wide aperture.

Would it be wise for me to send my Canon 40D camera along with the Sigma lens?
Or sending the 40D is not needed?

And another question is that I bought the lens used from a member here. I also have the warranty card, but it's in the previous owner's name and address.
Will Sigma still honor the warranty work if I have a copy of the receipt (purchase date: 11/23/2009)?

Thanks.

I just called Sigma service department, and the lady said that I can send it and marked it as a gift.
She also said sending in the camera would be a good idea as well.

Thanks for the help everyone.

Sirrith wrote in post #13406496
Most people send theirs in without the body and get it back fine.

Actually you'll find the opposite. Many users still have issues even when sent for calibration.

You seldom hear people complaining of "out of the blue" front/back focusing with a 35L. My 24L and 35L play perfectly nice on my 5d classic and work equally aswell on my 5dmk2's. Never a "huh?? front/back focus" shot. I cannot say the same for the Sigma 30mm and 50mm I've owned.

Been tempted to buy a cheap sigma 50mm for a while but after owning a couple and testing so many copies. I know I'll create stress of missing a shot.

Sending a camera body to calibrate a lens is a bad idea IMO. Now that means the sigma will be on one extreme of the scale or the other in terms of specification to match 1 body. Very likely your lens will be "off" when used on another body especially a rebel series or older xxd with no MA.