I have just ordered a EOS Mark III body and a Canon 70-200 F/2.8 II USM IS lens. Now I want a wide angle zoom lens to complete the package. I'm interested in a 24-70 f/2.8 lens. Canon's version does not have an image stabalizer and is over $2000. Tamron offers the same focal and aperture in their 24-70 f/2.8 with an image stabalizer for around $1300. Are there any issues concerning using a Tamron lens on a Canon body?