Originally posted by Atindra Thanks, I know longer lens would give pretty shallow DOF and could be used for Portraiture with amazing results.
It's not the shallower DOF that makes longer lenses better for portraits - it's the fact that you can fill the frame with a face, or head and shoulders, without needing to shoot from so close. Less then a few feet away tends not to be the most flattering perspective, as it can make noses and ears look more pronounced, for instance.
Quote: Therefore I am looking for primes. 77mm ltd is great but price is bit higher for my budgetary allotments.
DA70 is a really obvious alternative here, as is the Sigma 70mm macro.
Quote: But I am lurking for DA 40mm ltd
A great lens to be sure, but really short for portraits, except maybe for small groups, or perhaps couples. In fact, I don't know that it even focuses close enough to fill the frame with a face.