I've been helping my husband sell a bunch of antique tools on eBay by taking product shots. I think I'm doing okay (he says they are a lot better than most of the pics on eBay) but I always want to improve. I'm currently using shoot-through umbrellas with two speedlights and one continuous light as a modeling light, on a white paper background. The tools in question range in size from tiny drill bits that are a few centimeters long, to entire tools that could be 2 feet or more along an edge. I'm wondering who out there is doing product photography professionally or for fun, and what lenses you are using? One of the things that is important for my husband's purpose is depth of field ... we actually want small apertures and large DOF to get as much of the object in focus as possible. I have found that my 14-140mm has been most useful for this. With a wireless flash trigger setup, I don't even need a tripod, which really cuts down on the time spent fiddling around. The only time I use a tripod is when I'm shooting something really tiny and it has a lot of detail (like a maker's mark stamp) ... then I use my legacy macro lens. I'm shooting around f/11 to f/16 generally. (These are his auctions in case you want to see some of my pics: pacmot | eBay. You have to click on the auction and he has linked to full-size photos).