When I was considering the Think Tank Digital Holster 30 V2.0 as a possible bag to carry my 5D MKIII with the 70-200 f/2.8 or the 100-400 f/4.5-5.6 with the hood attached in position, I was disappointed that no reviews of this bag were to be found on the list of the Camera Bag Reviews sticky in POTN. Some folks have been asking me about this holster, too, so I thought I'd offer the review here.
Think Tank Digital Holster 30 V2.0 is a part of the Think Tank's Modular Component System, and it is one of five in the Digital Holster series. Of the series, the Holster 30 and 50 are the only ones that can carry a DSLR camera with the above mentioned lenses attached with the hood in position. The Holster 40 can also carry either of these lenses but only with the hood reversed.
MATERIALS (from Think Tank website: http://www.thinktankphoto.com/)
Exterior: For superior water-resistance, all exterior fabric has a durable water-repellant (DWR) coating, plus the underside of the fabric has a polyurethane coating. It also has YKK® RC Fuse (abrasion resistant) zippers, 600D polyester, 420D high-density nylon, Ultra Stretch front pocket, 3-ply bonded nylon thread.
Interior: 210D silver-toned nylon, high-density extruded nylon, polyurethane backed velex liner, 2x polyurethane coated nylon 210T seam-sealed taffeta rain cover, high-density closed cell foam, 3-ply bonded nylon thread.
DIMENSIONS
Interior: 7.25" W x 5" H x 11.25-14.25" D (18.4 x 12.7 x 28.6-36.2 cm)
Exterior: 8" W x 5.5" H x 13-16" D (20.3 x 14 x 33-40.6 cm)
WEIGHT: 1.2 lbs (0.6 kg)
WHAT COMES WITH THE HOLSTER:
Non-slip should strap
One divider and one flap for covering the camera at the top
Tethered, detachable rain cover
No Rhetoric Warranty
REVIEW:
Upon first unboxing the holster, I knew immediately that I made the right decision in choosing this holster over others. What I definitely didn't want was bulkiness, and this holster was perfect in that regard, not an inch more. I really liked the overall size and the way it felt on my waist. The top quality materials didn't surprise me as I'm not new to Think Tank products. All the external pockets are well thought out and appropriately placed. Let's go over these in pictorial details:
DH30 with the Non-Slip Shoulder Strap

DH30 with "Pop Down" Extended: The length of the Pop Down portion is exactly the same as the hood, meaning that you can comfortably fit the camera and the 70-200 lens with the reversed hood without extending the Pop Down.
IMAGE LINK: http://www.flickr.com …young-family/11980614476/

At the very top is velcroed pocket for business cards and convenient carrying handle
IMAGE LINK: http://www.flickr.com …young-family/11980184304/

Top front stretchable sleeve for filters, small notebook, smartphone, etc.
IMAGE LINK: http://www.flickr.com …young-family/11979778515/

Bottom front zippered pocket can be used for storing extra batteries and memory cards
IMAGE LINK: http://www.flickr.com …young-family/11980614716/

Right side zippered pocket has the lanyarded seam-sealed rain cover. This pocket can also be used for storing extra batteries and memory cards or whatever you need to carry.
IMAGE LINK: http://www.flickr.com …young-family/11980076743/

A closer storage view:
IMAGE LINK: http://www.flickr.com …young-family/11980614776/

Left side has the integrated side attachment system for connecting a Modular, Skin or Multimedia component to holster:
IMAGE LINK: http://www.flickr.com …young-family/11980076963/
