el greenerino said:
I don't have that one because i have the 50mm 1.4 ($315 on Amazon after rebate)
I'm on 35mm and probably wont go digital until a 35mm cmos camera cost less than $8000. I'm just starting out and would rather spend my money on the glass instead of the body.
I just don't trust 3rd parties when it comes to Canon EOS. I would if i was another system but i dont want to deal with firmware issues down the road.
First I work for a camera dealer, and shoot digital SLR's; so I hope that I can be of help.
Let me address this in order of your post.
1) The 50mm 1.4 is a great lens. No reason to change.
2) The future of full frame digital sensors is cloudy. I say cloudy since Nikon so far seems to be sticking with the APS-C sized sensors. Canon and Kodak are the only ones really doing anything with full frame in the EOS format right now. That being said Kodak offers a full frame sensor EOS mount 12MP camera at $4500 right now (
http://www.penncamera.com/store/item.asp?ITEM_ID=5500).
Keep in mind that in photographic history larger formats were always felt to king over the smaller formats. We say it from 8x10 and 4x5 view cameras when medium format came about. And it went on to when we saw 35mm come into its own.
Investing in good glass is a good way of going if you want the best from what you do. This leads to:
3) For us Canon users the firmware issue is of a long term concern for lenses. From my 10+ years experience in the field, this seems to be an issue more for Sigma lenses than Tamron or even Tokina (I have more experience with Tamron than Tokina in this respect). The only issue I know of with (other than Sigma lenses) is the back/front focus issue that affected even Canon lenses.
Third party lenses offer great value. In the case of the 28-75 2.8 Tamron; this lens offers a price/value combo that makes it hard to go the Canon route IMO. The USM can not be under sold IMO. But with the EF 24-70mm f/2.8L USM being about $1100, and the Tamron 28-75 being about $370 - you have to try and decide if the wider angle of view and "faster" focusing is worth the extra cost.
What is important is to find a dealer that allows a decent return privilege, or one that allows you to test some of the lenses that you are interested in. The best lens is not always the one that pay the most for. Sigma, Tamron, and Tokina can offer lower cost options due to the fact they build their mounts for many companies.
In the end, I would not say buy just Canon branded lenses. You may find yourself closer to that DSLR of your dreams than you think.