Originally posted by Jewelltrail Marc, one of the choices for a landscape which I listed is the Sigma 17-70. This would give the OP the 70 range for portraits if he feels 90 is too long
True, but now the compromise is that it's only f/4.5 at 70mm, which isn't ideal for portraits, either.
Quote: I do not think we should be making assumptions when we answer an OP. I think we should do our best to answer the question(s) which they ask.
I agree we shouldn't make assumptions. My view, though, is that we should should try to understand is whether the OP actually has the background to be able to make most effective use of the given answer, and if we feel the answer is no, we should help provide that background. If it turns out he already knows these things, then there is no harm done - the answer is still there.
So in fact, if you look over my responses, you'll see I've actually given quite a few 2-lens options, but with each, I've also tried to make it clear what specific compromise one is making with that option. In some cases, the compromise (nothing available for general purpose photography) is not one we know for a fact the OP cares cares about, but still, given that he is a beginner, I judge it at least plausible that he hadn't considered he even needed to mention that. so I want to make sure that he realized which options given left him with holes there.
I do think the two best choices are either 16-50 + Sigma 70 macro or else 17-70 plus Tamron 90 macro, but I also feel it important to be fairly specific about what compromises these entail, so the OP can decide for himself which he is most willing to make.
Quote: Will his needs change someday--sure, but then he can post for more advice when that day comes if he so chooses.
I mean, we could also make an assumption the OP will someday want an ultra-wide angle too, or a fish eye, or a teleconverter, or a split prism..............
Good points. On the other hand, it's also worth considering that the 2 lenses you'd buy if you truly hoped you would never have to buy another lens are potentially different than the 2 lenses you'd buy if you understood that this was just the beginning. And again, I feel it would be important for each suggestion to make clear how it plays into that. The OP would be free to ignore that if he happened to already be aware of those tradeoffs, but it seems by not including the info, we are assuming he *is* aware of these issues. And as you say, it is better not make assumptions here.
And, BTW, it was specifically his comment about not wanting "starter" lenses that made me question the extent to which he had thought these issues through - as well as the extent to which he was willing to compromise on his three main criteria. Maybe he'd be happier really *nailing* two of the three for now, rather than compromising a little on portraits in hopes of not needing to buy another lens in a year. Or maybe not. Who knows? that's why I think it's important to point these things out.