« on: March 28, 2014, 11:37:22 AM »
You seem very uninformed.
You are almost 1.1 times more likely to have a focusing issue with the Canon 35mm L than you are likely to have ANY issues with the Sigma 35mm A, based on actual reliability history from lens rentals which rents hundreds of copies of these lenses.
Read that a few times if you need to. You are MORE likely to have a FOCUSING issue with the Canon than you are likely to have ANY issues with the Sigma.
The Canon 35mm is a 16 year old lens and one of the least reliable lenses you can buy regardless of manufacturer, it has all the problems the Sigma has, and issues with dropping dead and decentering. The Sigma 35mm 1.4 is a brand new design, which comes with an incredibly long warranty.
If you're buying a used copy you're not going to have a few months left on the warranty at most with the Canon, which gives you a 1 year warranty.
Sigma gives you a 4 year warranty and it's a lens that is 2-3 times more reliable overall. The weight difference is also not noticeable, we're talking around a 10% difference. You'd be crazy to get the Canon for your needs.
The only reasons not to get the Sigma 35mm f/1.4 is that is has harder to correct distortion and much stronger purple fringing, which can both be annoying to correct. Otherwise the Canon is inferior in every way.
Uninformed? I have personally tried 3 copies of the Sigma 35mm F1.4, and 2 or 3 Sigma 30mm F1.4 on three different Canon bodies (5DIII, 40D, 60D). All had either focus inaccuracies or focus inconsistencies. This is not user error, I have been shooting for 3.5 years, and I'm not trying to sound cocky, but I do know what I'm doing.
I have also personally worked with the one and only one qualified Sigma lens technician available in Israel to try and calibrate a few of the said lenses, using their lab tools and using Sigma's new USB dock - we were unsuccessful and eventually I got refunded for the copy I have originally purchased.
Maybe the Canon uses old technology, but do you have any references for what you're saying? This is the first time I'm hearing such a review on the 35L, usually I hear only good things about it.
Ok well if you have only heard good things about the Canon 35mm f/1.4L, let me tell you a few bad things.
- Lens Rentals rents out over 700 different of lenses with over 12,000 individual lenses in their arsenal. The 35mm f/1.4L is responsible for around HALF of all inoperable focusing system failures they have, despite the rest of their inventory being several hundred times larger. Out of the 700 different lenses they have, the 35mm f/1.4 L has consistently been in the BOTTOM 20 or worse. That means that 680 lenses are more reliable than the 35mm f/1.4 L.
Like I said if you have problems with lenses having focus calibration, then you don't want a 35mm f/1.4L
Check the link if you have any skepticism:
"Canon 35mm f/1.4 14% Calibration, decentered element, autofocus failure"
The Canon 35mm f/1.4, not only cannot focus properly and requires calibration, but it's focusing system simply breaks, and many copies are severely decentered.
With that said 80% of copies of pretty much any lens are going to be good. What probably happened to you is that you bought multiple copies from a bad batch. I have purchased 3 copies of the Sigma 35mm f/1.4, to get the sharpest one and 2 copies of the Canon 35mm f/1.4 and haven't really had any issues with any of them, but what concerns me about the Canon is long term reliability. The lens simply breaks due to it's antiquated focusing system over time. You don't want to completely lose your investment.
If I were you I would just buy a Sigma 35mm f/1.4 from another source.