Hi- new guy here...
In September my wife and I went on my first international vacation, to Scotland. In preparation, I told my wife I wanted to travel light with camera gear and I bought two new lenses to go with my K-5, the DA 15 and 21mm Limiteds. (Both together were half the weight of the Sigma F/2.8 18-50mm I was going to take, and very friendly, weight-wise, to have on the camera/in my hand all day long for a week.) The trip photos were more memory/snapshot in nature than fine art attempts. I shot about 960 photos in the week, over 900 were with the DA 21mm. I posted about 100 at my blog site. Except for one waterfall shot, I edited none of them other than to convert from raw to web friendly jpeg size, so there is no color or light tweaking, no post-capture sharpening, resolution is dropped way down as jpegs, etc. Of the images posted, a few will be captured with the Pentax 55-300, a few with the 15mm Limited, and the rest with the 21mm Limited. Peruse at your leisure. Sorry I didn't identify the lens or shooting info with each image, but you'll get the point. These are both terrific lenses (the Limited lenses), and just today I sent in an order for the DA 40mm Limited. Scotland photos-
Steve's View of the World: Snapshots from Scotland Click on an image and that entire posting of photos will come up in a text-free, larger format slide show. I love this 21mm Limited. And I'm not afraid of a little cropping if needed to "zoom in" on a subject in a photo to emulate a 28mm or similar lens, esp. with the K-5.