I replied to a post on the other Pentax forum asking about small bag for a K-7 body with a DA Limited lens. I think I should also post here.
I use a Nikon 5523 bag for my walkaround kit: K10D and a DA Limited lens. The K-7 body is even smaller than the K10D body so the bag should be OK.
The outside pocket contains a spare battery. The inside pocket under the lid can contain a memory card and a micro-fiber lens cleaning cloth.
Note that the "stock" lens hoods of the DA70 and the DA21 have been replaced with my version of the DA40 hood: a 49-37 and a 37-30.5 step-down adapter ring. Otherwise the camera with the DA70 or the DA21 doesn't fit.
The DA70 doesn't have any vignetting problem with the "new" lens hood. But for the DA21, I have to use a thin 49-37 step-down adapter (Sonia). The B&W 49-37 step-down adapter is only 1mm thicker, but it results in vignetting.
I also use the Nikon 5523 bag for my other walkaround kit: a Ricoh GX200 with a Nikon 0.68X wide-angle adapter. This kit has a 16mm - 50mm (35mm format equiv.) lens.
The Nikon bag is not weatherproof, but it feels nice with the soft leather. It's less than $20 delivered:
Nikon 5523 *Camera Case for Nikon Coolpix 5700 Digital Camera (55-23) - SaleStores.com 305-652-0442
Last edited by SOldBear; 11-18-2009 at 02:27 PM.