Hi All

I am now the proud owner of a lensless EOS-7D. One of my major uses for this will be to take images of surgical procedures for teaching purposes(I am a specialist veterinarian). There will be no need to be able to sterilize or sanitize the lens as a non-sterile assistant will take the pictures for me.

The subject will usually be well lit by (halogen or LED) operating lights, and the field of interest will vary in size from as small as 40 mm square to possibly wanting to show an overview of the entire operating table.

So my first question relates to lens selection. Is one of the Canon zoom range appropriate for this specific application. I'd rather the photographer stayed a sensible distance from the surgical field, but they can come in as close as 30-40 cm without a problem. The EF 24-105mm f/4 L IS USM appealed to me, because i though it would probably also double as a good general purpose lens for me at home as well, but then i started to wonder should I maybe be looking at a faster lens with a bigger maximum magnification, or something totally different?

Does anyone have any experience in this area or any suggestions as to what i should look at specifically. Happy to hear any thoughts

Thanks

John