Originally posted by dannyial Hi all, newbi here, have K5 as my first Dslr, with the kit 18-55 as it was all I could afford at the time.
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Thanks in advance for any input and I apologize for taking so long to get to the point.
The Pentax lenses you mention are simply outstanding. I haven't used them much on the K5 yet but I'm getting to them (the 31 is on the camera right now). If you have your heart set on the 31, then get it. You won't be happy until you do. That was my experience a few years ago anyway. You might want to look into a Used one however unless you are Really concerned about getting a 'bad' copy (I guess they do exist just like anything else).
The argument that you can also pick up the 35 and the 15 for (about) the same money also would carry a lot of weight. I would be asking myself though how much I was going to use the 15 (and I Do have one). Many people make the mistake of thinking you need an ultra wide angle lens for landscapes but it simply isn't true. The 15 Will do it but it isn't required.
The 35 is also a great lens. Some will tell you that the macro capability is useless. Well, BS. I guess if you're trying to sneak up on a nervous bug for a 1:1 shot, then yes, it may be but otherwise, no.
I really don't think you can go wrong with any of them but were I in your place (and I was once), I would start with the FA31.
Pentax FA 31mm Limited - a set on Flickr Pentax DA35mm Limited - a set on Flickr Pentax DA15mm Limited - a set on Flickr