Is the 3rd party QC lottery fact or fiction?

No argument here, I'm sure all manufacturers have some QC problems. I was just reading a thread here on the POPTN about how the nifty fifty has a nasty little reputation for the mount screws backing out, to the point where you can't get the lens off the body. -rick


https://photography-on-the.net …/showthread.php​?t=1263715

uOpt wrote in post #15458665
It's not just third party.

Canon's 50mm f/1.4 also comes out very random. And many break later, which at least the equivalent Sigma does not.

As many of you know, at Adorama we have been running a pilot project for a few months where we've carried out testing on Sigma lenses prior to shipping out. While it cannot be 100% guaranteed that both the lens and body might still need to go off together to Sigma for re-calibrating, we now have clear data regarding numbers that we have found that we felt were not good enough.

Sigma has looked over our results, and has asked us to start collecting additional data from customers.

I've had the go ahead from Pekka to get assistance from POTN members and will be starting a new thread tomorrow to enable us to do this.

This is what I'm going to be asking:

DATE OF PURCHASE:

SIGMA LENS MODEL:

SERIAL NUMBER OF LENS:

CAMERA(S) USED:

THE EXACT ISSUE WITH THE LENS:


Thank you in advance for your help.

Helen@adorama.com

^^^Wow!

HelenOster wrote in post #15466357
As many of you know, at Adorama we have been running a pilot project for a few months where we've carried out testing on Sigma lenses prior to shipping out. While it cannot be 100% guaranteed that both the lens and body might still need to go off together to Sigma for re-calibrating, we now have clear data regarding numbers that we have found that we felt were not good enough.

Sigma has looked over our results, and has asked us to start collecting additional data from customers.

I've had the go ahead from Pekka to get assistance from POTN members and will be starting a new thread tomorrow to enable us to do this.
....

Helen@adorama.com

Wow Helen, talk about being proactive and going above and beyond what is expected from a retailer. My hats off to you and Adorama.

The 100-400 is a good lens, albeit very dated now. It has the known dust sucking feature, and eventually, whatever is inside the push/pull, along with the locking ring, will give up the ghost. You will end up with little black pieces that fall apart and out of the lens. Happens on a lot of them.... IS is old too, maybe 2 stops if you are lucky.

The Sigma 50-500 is sharper at 500mm wide open than the Canon at 400mm, but the Sigma at 400mm is a tiny bit less sharp. It has other features though like macro mode at 200mm or so, much better IS, and a wider range.

I have tested 4 100-400Ls against the Sigma, and my original 100-400L that I had before getting the 50-500 was the only one that beat out the Sigma, in all other 3 cases, the Sigma was the winner for IQ. I really wanted to go back to the slightly smaller lighter 100-400L for transport reasons, but couldn't ever do it. Now I have a Pelican case, and the Sigma fits there nicely, transport issue solved!

Pics from the 50-500 on the 7D from this pic onwards, and many others in the gallery too.

http://teamspeed.smugm​ug.com …3b#!i=867851193​&k=Tr3JL4g

that's great news helen. my experience with adorama has always been very positive. can't wait to see the new thread. i'll definitely subscribe to follow the progress.

Tc202 wrote in post #15451889
I would buy the canon 100-400. You will not regret that lens at all. It is sharp and has pretty fast focus. I personally loved the push/ pull design.

true, the 100-400 is sharper with faster AF than the Sigma 150-500 and Sigma 50-500. The push pull makes it easier to zoom in for sports and wildlife.

watt100 wrote in post #15467275
true, the 100-400 is sharper with faster AF than the Sigma 150-500 and Sigma 50-500. The push pull makes it easier to zoom in for sports and wildlife.

i'm really lost as to why people dislike the push-pull...i use my 150-500OS as a push pull by just grabbing the far end of the lens...it's so much easier/quicker than using the zoom ring..