Are there any lenses which are specifically more suited to studio photography than others? I have an Olympus E410 DSLR with two lenses a standard zoom (17.5-45mm) and a zoom (40-150mm). Cheers people!

I’m in the market for a good entry level DSLR. The issue is that many dealers in India sell cameras without manufacturer warranty. This puts a question mark on the quality/legality of the product and I don’t want to get ripped off buying a refurbished product. There’s nothing that will help me avoid buying a used product but I know that refurbished products have certain identification marks. If I get to know what these are at least I will be able to avoid buying such products.
Any help is much appreciated. Thanks in advance

I have a Canon Digital Rebel XTi and I already have the Canon EF 50mm f/1.8 II which I love! But I want to have a wider variety of lenses to choose from and I’m sort of on a budget.
They don’t necessary have to be made by Canon, as long as they fit on my camera and work nicely.
Thanks in advance for the help!

Before digital days, I would have said an 80mm lens. However, with the conversion, now the digital lens I’d recommend is a 50mm lens.