I'm looking for a holster type bag for the above. Anybody got any recommendations ?
I have a Hama that I use for my 550d + 17-70os does the job
The Lowepro Toploader Zoom 50 AW is definitely worth investigating. It should easily protect your gear and the all-weather protection offered should protect your valuable kit from the elements. You should be able to pick it up for under £30 too.