Considering a 17-40L....questions!

TreInJapan wrote:

Hello!
Recently picked up a 6D, and i'm loving it. I love the 24-105 and I'm really impressed by the low-light performance of the 6D. I still have my t3i which I love, and one of my favorite lenses is the Tokina 11-16 F/2.8, which is made for APS-C, so it's really only useful on FF at 16mm. I could keep it and very rarely use it on the t3i, or I could sell it and add a bit more to upgrade to a 17-40 for the 6D, but I have a couple of questions.

-My hopes for my next lens:

• Wide enough to shoot interiors well. I do occasional interior photography and want something sharp and reliable. The Tokina was great for this.
• Sharp enough for portraits at 40mm. (Had another thread recently where I got a bum Sigma 50/1.4 that I was hoping might fit this bill, but instead just got a full refund.)
• Solid wide-angle performance for video and glidecam work.
• Occasional low-to-mid-light group shots at parties and events.

-Questions

1. Is it decent for portrait work?
2. Any experience with video work? I know wide angle lenses are generally pretty solid, but perhaps I can hear first-hand from someone who has worked with this lens.
3. Does the 6D's low-light performance compensate for the 3 stops in aperture over the Tokina? On my t3i, if I was shooting anything over 1000 ISO, the shots were pretty noisy. But with the 24-105 I can pretty much shoot into a dark corridor and shots still come out okay at 12,000 ISO. So I would assume it would be fine...
4. If you don't recommend this lens for the above-stated goals, do you have another lens or pair of lenses that you would recommend for a similar price? Another option would be to just keep the Tokina and always use it at 16mm, then get a nifty fifty or pancake 40 or something. Though the last nifty fifty I had didn't focus right all the time, so that worries me a bit. Also, I need fast-focus!

Any first-hand experience or input would be great! Thanks!

here is a portrait taken with 24-105 f4.0 on a 5D:

please click on the photo and view it on dp viewer for detail!

i use my 17-40mm f4.0 strictly on my aps-c (40D) and get very good result. here is a gallery, all taken with 17-40 and 40D:

http://azbaha.zenfolio.com/p572883877

cheerz.