Hi Gary, it's a difficult one to answer as lens choice can be quite a personal thing. As a rule if you stick to 'known brands' there aren't too many duff lenses nowadays - Sigma, Tamron, Canon themselves - all make good lenses. So then it comes down to budget and whether or not she's looking for a zoom or prime (fixed focal length) lens. She'll most likely have some kind of standard lens which might be a zoom, so if she's looking for wider than that then you'll have an idea of the focal length to look for. I'd be inclined to maybe take her on a surprise shopping trip to a local photography store and let her guide the way with what she'd like? That way everyone wins...