I enjoyed reading your thread on DPreview Erick - an interesting bunch there eh! Well, that's what you get for suggesting purchasing from a 3rd rate outfit I guess. :-)
I'd say the quality between the Tokina and the Canon is the same. The Sigma is quite a different lens, quite fatter. The Tokina is not EFS so can be used on FF cameras from about 18mm upwards.
Cheers
James
Hey James,
Yes that was an interesting "3rd rate outfit" experience. But a good learning experience and now I'm no worse for the wear. I will go with one of the many companies recommended throughout those threads now that I have learned the ropes. Luckily that experience got me to go on these forums, so I'm actually better off from the experience when you look at it in a practical light because I have been given so much great advice. So I guess if you have read those threads you know that I eventually decided upon the 70-200 f/2.8 IS w/ 1.4x extender when needed for telephoto and the 24-105 f/4 IS for my walk around as my "land lenses". And, now with your help I believe that I have settled on the 17-40 f/4 and the 10-22 f/3.5-4.5 to round out the full zoom range (Canon over Tokina for the extra two mm of focal range since they are optically equivalent) and this should have me covered when I make the "dive" into underwater photography as well! Once I get the hang of the camera I'll work my way back up from the shorter focal lengths to the longer with a collection of primes to fill out my underwater and macro selections and if I want to get beyond the 200mm w/ 1.4x then I'll really have to fork out a lot of $ because, quite frankly, I didn't like the way that the 100-400 reviewed when dusty conditions are taken into consideration (Kenya is very dusty), and those high focal length primes become really expensive! So those will have to wait a couple of years at least because I have to save up for my underwater housing first, because it is very obvious that these lenses and the 30D body are going to suck me dry! Maybe in 3-4 years I'll look into a new body and hand the 30D over to my wife, then because she is scared of lenses that cost over $1000 I'll leave her with the 10-22, and get her the inexpensive 17-85 and 70-300 IS. Then I might pick up the tokina for myself to replace the loss of the 10-22, but there might be all kinds of new options for both of those lens kits (mine and hers) come that juncture? So I'll have to start my homework all over again!
Thanks again for all your help,
Erick
Not to ask a stupid question, but why would you want both the Tokina 12-24 and the Canon 17-40? Underwater, the 12-24 forces you just a bit closer (mostly a good thing). I have both and don't use the 17-40 underwater at all. The 17-40 is a nice lens topside so maybe that's what you want it for -- I use the 17-40 topside as my walk around lens at the moment but am thinking about getting the Sigma 18-200OS when it is released as I missed way too many pictures walking around on my land tour in Indonesia this year beacuse I kept wanting to switch between the 17-40 and the 100-400. I need something in between and it is a pity that Canon doesn't offer much in that range for a decent price (like Nikon does with its 18-200VR, though as usual they can't make enough to keep stock in any store I know of). Other than that, I think you've got the right analysis of the lens quality. For the price, the 17-40 is a very good performer.
Hey Mike,
I would be getting the 17-40 primarily as a topside WA that is not extreme like the 10-22 can be, but I also like that it can be used effectively underwater, so while it would not be my main underwater lens, it could be useful in some circumstances. For instance, as mentioned in some threads, as a lens for shark or manta dives where I might not be getting as close to the action as I might like to, or need to to effectively use the 10-22. I also like the aspect of having both for reasons of upgradability in the future which I covered in my previous post in this thread.
I hope that addresses your question adequately.
Erick