I'm plan on buying a 70-200 2.8 len do i really

There is no way to fix a lens problem, if i were you, i would return it, get it repaired, or buy a new one. there is no way to fix one unless your really good at disassembling things,

Thank you for your sunshine. This is not the kind of query with which Fixya can really assist you, I'm afraid - have you thought of consulting the many on-line forums which exist to offer advice on exposure and software. Good luck.

Your problem is a simple one: technology doesn't stand still.

Your lens was designed to work with Canon technical protocols which existed seven years ago and things have advanced somewhat since then.

With some third party lenses it's possible to send the lens to the manufacturer's service agent and pay to have it serviced and updated, but this cannot be done with your lens.

You'll have to buy a more recent lens model if you want to use it on your Rebel T1i. Older Canon lenses should mostly still work (unless Canon clearly state otherwise) as Canon will have taken their design into account on later bodies, but Canon have no interest nor any reason to make their later bodies able to use older non-Canon products.

Sorry that this is not the answer you hoped for, but I hope that you have still found it to be of some use and that you take a moment to rate my reply.

Please visit to:

http://www.sigmaphoto.com/sigma-lens-finder

Insert a flat blade screwdriver in slot at the center of the lamp housing, rotate screwdriver upward and unsnap dome lamp lens. Pull lens downward and remove it from lamp housing.

In here you need review two documents:
- ZJ-Secc-8L-Lamps (page 10)
- ZJ-Secc-8C-Overhead-Console

I really hope helped with this, remember rated this help. Good luck.

Check this info KJ-2002-Liberty-Service-Manual-PDF-Secc-08-Electrical-Systems ( 8L-1 page 165 and next) about headlight remove instructions.

Good luck!!!

You have named several excellent digital SLR cameras aimed at the top end of the amateur/semi professional market.
I have the Nikon D200 and have been very pleased with it.
As stated by JCDill, you must really decide what you want and can afford. The camera body you choose will commit you down one path or another. For example, if you choose Canon, only Canon or OEM (Other Equipment Manufacturers) such as Sigma lenses will fit your camera body. Canon have a good reputation for their auto-focus, while Nikon make lenses that are the envy of others.
If this is your first digital SLR then you might be best buying an entry level body with a multi-purpose zoom lens such as the Nikon D40. There is a lot to learn.
If you are converting from film SLR and already have a set of lenses, then the cameras you mentioned will probably be able to use your existing lenses (but this is less so with Canon than Nikon). I was ecstatic to disover that my old Nikon 500mm mirror lens works in manual mode (with metering displayed) on my Nikon D200 but would not work properly on my Nikon D70.
I hope this helps.

if you live in the uk i can offer you a few contacts who will give you a price who will cover but it might be worth once it breaks just to buy a new one because then you will have a years new warrenty on the product. MP520 is not really worth extended service plan to be honest.

Hope this is ok

Check this info: 93ZJ-Secc-8L-Lamps review the 8L - 6 Page

Good luck!!!

It really depends on what kind of photography you want to do.
I own both of those bodies, and the 5D is great for landscapes, portraits, and other artsy stuff.
However, the 3 frames per second doesnt compare to the 5FPS of the 30D, so if you're shooting sports, the 5D will do better.
Also, 5D is better for wide angle shots.

If you do decide on the 30D, again, lens choice really depends on what kind of shooting you plan on doing.