help picking next lens.

Just picked up a new 7D, I would like help in picking my next lens. I have a 30D also and here are my list of current lens canon 28-135 IS kit lens, Tamron 17-50 2.8, and a canon 70-200 2.8 non IS, I like to shoot car shows, portraits. i am on a tight buget, may be maxing out at 500.00 Give me your best advise thanks everyone.

Have you used prime lens before? If not, you should fast prime. Maybe 50mm or 85mm for portraits .. Or wider for general purposes

In that price range, either the Canon 50 1.4 or Sigma 30 1.4

Yep what others are saying.
Sigma 10-20/5.6
Sigma 30/1.4 or Canon 28/1.8
Canon or Sigma 50/1.4
Canon 60/2.8 if you want to add the small details at the car shows
Canon 85/1.8

Same as others suggested: sigma 35 1.4 or Canon 50 1.4 or 85 1.8

If car shows is your focus get something wider than 17mm for crop. At crowded car shows you'll need to be able to shoot closer to the cars because of crowds. Maybe canon 10-22 or Tokina 11-16. Also if you ever get into rig shots you'll be ready. If your focus is portraits probably canon 50 1.4.

thanks everyone. i think i would like to try a fast prime, as in the 50mm or 85mm thanks for all your help.

oscarl62 wrote in post #13713767
Just picked up a new 7D, I would like help in picking my next lens. I have a 30D also and here are my list of current lens canon 28-135 IS kit lens, Tamron 17-50 2.8, and a canon 70-200 2.8 non IS, I like to shoot car shows, portraits. i am on a tight buget, may be maxing out at 500.00 Give me your best advise thanks everyone.

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for car shows, might as well get the wider 17-50mm
Its good to have 2 lenses, but i'd grab the tamron 17-50

StructuredAmazing wrote in post #13716934
for car shows, might as well get the wider 17-50mm

There's a wider 17-50mm than the Tamron 17-50mm he already has?

The 10-22 would be a great lens for car shows, but it's about 150% of the OP's stated budget. The Tokina 11-16 is $150 or so out of his stated budget also. The Sigma 10-20 would be a good choice for a UWA and fits the budget.

For portraits, the 50mm f/1.4 would be a good choice. You might find the 85mm a little long on a crop sensor, but some like the FL.

alright i will Consider that thanks, so far i am very happy with my Tanron 17-50. its very sharp and fast, as for car shows it has worked out well.