« on: September 09, 2013, 10:13:13 AM »
With the quality of the previous released Sigma lenses...serious Canon competition!
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I am curious if anyone has noticed problems with peripheral AF points on the 5D3 and this lens like those mentioned at http://www.dpreview.com/forums/post/42545234?
Sorry if this has been asked previously.
Seeing no one jumping up and down I decided to test the lens. Sadly, my results are consistent with the above link.
I tested the lens on a brick wall and on some more challenging subjects as well, using aperture priority and three focal lengths: 24mm, 50mm, and 70mm. All shots were made on a tripod using a two second delay. I only tested at f/2.8. Since I was comparing only f/2.8 shots I believe it is a fair comparison. If I want to use an f/4 lens I have the 24-105. I took multiple images (at least three) of each test shot, except the center point shots where I generally only took two.
The results were consistent at the three focal lengths I tested. Using the center AF point of the 5D3 the shots are nice and sharp. They are sharp over the peripheral AF spots as well. Using a peripheral AF point the image is soft throughout. These are sample screenshots of the RAW image at 70mm in DPP at 100% showing the selected AF point.
I would send it into Tamron. Their customer service is excellent and they will fix this for you.
Here's the most complete 70D review i've found for now :
Canon Rumors loads almost instantly on my iPad and on my Win 8.1 PC. I have a 116Mbit/s internet connection and a HP Z800 Dual CPU workstation.
If CR is loading slowly, I suspect the issue is most likely related to your internet connection speed foremost, PC speed cold be a secondary issue causing the delay. Though unless your PC is ancient (6+ years old), I suspect the hardware will not be the issue.
none of the CR domain code is slow,
it's just google (adsense and G+), twitter, facebook, (gurble?!?) and a smattering of other domains that get (multi-?) referred to by whatever I haven't had the patience to track.
By the time some of these things get resolved the sun has moved perceptibly across the sky when I try to access from work - I've had loads take nearly 3 minutes or even time out.
At home I'm on a feed that's got great burst BW and Mb+/s sustained thru-put. Page loads reasonably well but all the non-CR domains are still fairly slow to load.
Yup, maybe a new adblock plugin is needed, and custom block everything else. Hmmm... maybe my ISP is traffic-shaping some of that junk.
edit: anyone else on this part of the continent having load speed issues? (AB, BC, WA, ID, MT, AK)
edit 2: yup, with some updated ad, script, and track blocker plugins CR front page loads super fast.
I was in Bali last week and I hired a driver to take me off the beaten path. We rounded a curve and saw some wild monkeys just off the side of the road. I figured they would scatter, but they actually came closer to check me out. The driver explained that the monkey is sacred in Bali and they are not hunted or harmed. Therefore, they really have no fear of man. This mom and baby were about six feet from me, watching two other monkeys chasing each other, when I shot this...
Compared to a gripped 5DIII, the 1D X is more stable on a tripod.
This is posted in third party manufacturers, lol.
Good observation. So maybe bought a Sigma prime EDIT: or maybe a Zeiss prime
Or, went for a Hasselblad or Leica
The background in his profile image which has changed from red to yellow hints at a different brand than the ones you mention though...