Post by tonystrak on Jan 15, 2018 20:24:31 GMT 8
Hi,
Firstly I don't dispute that there have been problems with faulty Sigma lenses, as there have been problems with Olympus lenses, Canon, Nikon, Pentax and just about every other brand of lens. What I mean is that someone has a problem with a Sigma lens (or several) - then this is taken to prove that Sigma lenses have a particular problem. However, if someone else has problems with a lens from Olympus, Canon etc, then it is just seen as a one off.
In the last 28 years I have owned about 16-17 Sigma lenses ranging from wide-angle zooms and primes up to my 4/3 fit 50-500mm. I can't be sure of the exact number without sitting down and carefully working it out, but I still have 10 - some about 16 years old. So far I haven't had any real problems apart from a couple of fungal spots on old lenses. Yes I do need to send off my 4/3 Sigma 105mm macro for repair as the de-clutch mechanism for AF appears to have got broken (although it still AFs, but doesn't MF) - although this happened in a cycling accident and you should have seen the mess I was in. Okay, just as one person having problems with a Sigma lens doesn't prove that all Sigma lenses are rubbish, my not having any problems with any does not prove the reverse.
I'm not any sort of Sigma fanboy. Often when I have got a Sigma lens it was not because I particularly wanted a Sigma lens, but because nothing else was available within that sort of focal length, close-focusing ability, price range etc.
I am not even going to deny that with some types of Sigma lenses there does appear to be a lot of copy variation. It appears that complex longer focal length zooms or some telephotos are more prone to problems than other types of lenses. This isn't confined to Sigma though. Just check out Photozone's lens testing and see how many of the Camera manufacturers lenses also show similar quality control problems. Here are tests of 2 very popular long focal length Canon lenses, the f4 300mm L IS and the 100-400mm.
For More Details
Brand Reveal video
Firstly I don't dispute that there have been problems with faulty Sigma lenses, as there have been problems with Olympus lenses, Canon, Nikon, Pentax and just about every other brand of lens. What I mean is that someone has a problem with a Sigma lens (or several) - then this is taken to prove that Sigma lenses have a particular problem. However, if someone else has problems with a lens from Olympus, Canon etc, then it is just seen as a one off.
In the last 28 years I have owned about 16-17 Sigma lenses ranging from wide-angle zooms and primes up to my 4/3 fit 50-500mm. I can't be sure of the exact number without sitting down and carefully working it out, but I still have 10 - some about 16 years old. So far I haven't had any real problems apart from a couple of fungal spots on old lenses. Yes I do need to send off my 4/3 Sigma 105mm macro for repair as the de-clutch mechanism for AF appears to have got broken (although it still AFs, but doesn't MF) - although this happened in a cycling accident and you should have seen the mess I was in. Okay, just as one person having problems with a Sigma lens doesn't prove that all Sigma lenses are rubbish, my not having any problems with any does not prove the reverse.
I'm not any sort of Sigma fanboy. Often when I have got a Sigma lens it was not because I particularly wanted a Sigma lens, but because nothing else was available within that sort of focal length, close-focusing ability, price range etc.
I am not even going to deny that with some types of Sigma lenses there does appear to be a lot of copy variation. It appears that complex longer focal length zooms or some telephotos are more prone to problems than other types of lenses. This isn't confined to Sigma though. Just check out Photozone's lens testing and see how many of the Camera manufacturers lenses also show similar quality control problems. Here are tests of 2 very popular long focal length Canon lenses, the f4 300mm L IS and the 100-400mm.
For More Details
Brand Reveal video