Sigma Lenses

All:

Im thinking of going with a sigma 50 1.4. One of the things ive heard a lot about is calibrating this lens and quality control with sigma in general. Seems like a lot of people need to do this so i thought it would be intresting to start a poll and see what people have to say. What has been your experience with your sigma lens. Doesnt matter what time you bought. So tell us what have you done to your sigma lens?

There are quite a few threads on this subject do we really need another? Also your going to get a biased opinion as people are more likely to voice their opinion when something is unsatisfactory. Go to your local store and put one on you camera and do some test shots. If it has issues try another.

So far silvrr it doesnt looked biased. 3 people have reported no problem. I understand what your saying but at the same time its just a poll and i did a search first on polls and it dealt with the AF problem. Here im just asking on calibrating it yourself. This poll came out of a suggestion from this following thread:

https://photography-on-the.net …hread.php?t=831​545&page=4

I don't know if you are looking for feedback just on this lens or Sigmas in general. My 100-300 f4 never needed extra calibration.

Nope just sigmas in general. People keep bringing up quality control so i wanted to poll people on thier experience with sigma. Thanks juan for taking the time!

does Micro Adjust counts as Calibration? Because it works fine on my XSi without MA but on my 7d it looks even better with a little MA.

I just returned my Sig 50mm 1.4. No it did not focus properly at 1.4 and I saw no real difference compared to my Canon 50mm 1.4. YMMV. Not worth the hassle IMO.

I had a sigma 10-20 and it was sharp sharp with no micro adjustments. My Sigma 100-300 is also very sharp and no AF adjustments either.

rogazilla wrote in post #9680553
does Micro Adjust counts as Calibration? Because it works fine on my XSi without MA but on my 7d it looks even better with a little MA.

Yup that does count! Intresting find there rogazilla. Thanks for the input!

grant247 wrote in post #9680554
I just returned my Sig 50mm 1.4. No it did not focus properly at 1.4 and I saw no real difference compared to my Canon 50mm 1.4. YMMV. Not worth the hassle IMO.

Hmm thanks grant for the input!

I have also seen this comment from lensrental.com

http://www.lensrentals​.com …a-50mm-f1.4-hsm/for-canon

"Roger’s take Its become apparent through many tests and online forums that the Sigma 50 is a ‘special’ lens. I was glad to find this out because it was driving me nuts. Its a very nice lens when you use it just right, with superb sharpness and smooth bokeh. But here’s the summary:

1) It works very well on crop frame cameras and at middle (5 to 15 feet) distance, so its a wonderful indoor lens.

2) On full frame cameras and to a slight extent on crop frame cameras the lens exhibits what I will term ‘schizophrenic autofocus’: Closer than 5 feet it will front focus, further than 20 feet it will backfocus. This is not a calibration issue, its just how it is."

Can't answer if I returned while acquiring one model lens, but did not return while acquiring another model. Or, purchased a couple of used Sigmas from reliable sellers, to avoid any potential problem.

Also, Roger posted a survey that was done at lensplay.

Results:

Canon lenses - 12088 with 912 defects
The probability of getting a good lens is 92 %
The probability of getting 5 Canon lenses in a row is 68 %

Sigma lenses - 2713 with 598 defects
The probability of getting a good lens is 78 %
The probability of getting 5 good Sigma lenses in a row is 29 %

Tamron lenses - 1342 with 206 defects
The probability of getting a good lens is 85 %
The probability of getting 5 good Tamron lenses in a row is 43 %

TaDa wrote in post #9680582
Also, Roger posted a survey that was done at lensplay.

Results:

Canon lenses - 12088 with 912 defects
The probability of getting a good lens is 92 %
The probability of getting 5 Canon lenses in a row is 68 %

Sigma lenses - 2713 with 598 defects
The probability of getting a good lens is 78 %
The probability of getting 5 good Sigma lenses in a row is 29 %

Tamron lenses - 1342 with 206 defects
The probability of getting a good lens is 85 %
The probability of getting 5 good Tamron lenses in a row is 43 %

Intresting! Tada we missed you at the Chinese New Years Parade in NYC. It was a good turn up of fellow POTNers!

a) I'm not Chinese
b) Whole family had the stomach flu. Decided to spare you guys from the joys of watching me yack.

TaDa wrote in post #9680614
a) I'm not Chinese
b) Whole family had the stomach flu. Decided to spare you guys from the joys of watching me yack.

Ouch! Im partial to anything stomach related since i have the weakest one around so i totally understand!