About a month ago I had the opportunity to sell my Canon 20D and decided to throw in my 28-105mm USM lens in with it.   So I needed a new DSLR and a lens.  After long debate I decided to go with the 7D and saw that there were 2 kits available.  There was a Canon 7D with a 28-135mm lens or a second package that had the Canon 7D plus a 18-135mm lens.  The package with the 18-135mm lens retails for an extra $100.  Both are Canon lenses, have image stabilization and are f:3.5-5.6.  The packages appeared to be comparable and it made sense that that the wider Canon lens was slightly more expensive.  I now realize I should have looked a little closer at the 2 packages.

So I decided to go with the Canon 7D with the 18-135mm lens.  The primary driver behind this was the Canon 7D magnification.  If you are not aware, the Canon 7d, like many other non professional cameras,  have an inherent zoom factor of 1.6x.  So a 18mm lens on the Canon 7D, is equivalent to a 28mm lens.  As  I stated earlier, I had a 28-105mm that I originally purchased for a film camera.  The Canon 20D also had the 1.6x magnification and I often missed the ability to shoot at 28mm.  So long story short, this is why I went with the package that included the 18-135mm lens.  What I did not realize, was the lenses were not as similar as I thought.  The 18-135 was an EFS lens and is not a USM lens.

At this point I can’t say that I regret my purchase, but I can say that I wish my 18-135mm lens was a USM lens.  The fact that the external focus ring moves when I use  auto focus is pretty annoying and it is rather loud.  I have other Canon USM lenses that I will likely use if I need to shoot high action, but if I didn’t I am not sure what I would do.

Anyway if you are looking to purchase one of the Canon 7D Kits, be sure that you understand the difference between EF vs EFS lenses and also what a USM means.  It may not make a difference to you, but  had I known this before, I may have waited for a deal on the other Canon kit and purchased that one.