Ray,
I know your Rebel can do it, but that is an SLR.
His lists a range not a minimum, and the latter camera he posted specifically says the same thing on the lens 2.8-4.8 , then in the text says f2.8 [t]- f4.8 [w] which tells me that cannon uses a range on it's fixed lenses. the Fuji I got was a fixed lens SLR, but could go down to f8. Mine takes 55mm adapters so I would assume the Cannon Phillip is looking at would also use lens rings.
Since I have a problem reading the specs, do you have a way of telling what the camera Phillip is looking at is the smallest aperture he can use and if it is adjustable. In model photography, being able to control the aperture is paramount in my book.
I admit I am not even a rank amature when it comes to the nitty gritties of photography. I did however, have help selecing my cameras by a pro.
BTW, I consider myself very much of an amateur in the field of photography as well. I know the theory fairly well but don't yet have the skill to use it effectively.
If you want to see the math, check this out: http://en.wikipedia.org/wiki/Depth_of_field or here: http://en.wikipedia.org/wiki/F-number
Looking at those has made me decide not to take the course offered at Hobart (by the other pro) on photography.....