I found time this week to knock up a first prototype for the internal encasement. This I made using a cheap and nasty closed-cell foam sleeping mat costing €2.50 from the local D.I.Y store. The first change I made to the design was to dispense with the Duct Tape used in the first example. Duct Tape weighs around 0.15g/cm (I can hardly believe I just typed those words. Looking at it written down it sounds like one of those thoughts that should better be left unsaid!). For the construction I first put to paper this would ammount to 30g of tape to hold 30g of foam together. Seeing an opportunity to halve the weight of the inner I experimented with glue. I know from past experience (don't ask) that anaerobic Cyanoacrylate (super glue to you and I) works well with foam matting. after a little fooling around I found a way of making neat mitred corners by scoring two shallow lines with a sharp craft knife, peeling out the strip of foam between the lines, squeezing a glue line into the groove and folding to form the corner:
With three such joints and a butt-joint the construction of a rectangular cross section tube was soon realised:
Three mitred joints and one butt joint make the basic shape of the inner.
One end was then closed off by butting a rectangle against it and placing a smaller, tight fitting rectangle on the inside face of the base to create a double thickness.
The base was butted against the tube and a second layer added on the inside face.
Since I want a top-loader I had then to create some internal structure to support the camera body leaving the lens suspended in the bag. I made two, double layer verticals, beefing up the top edge by wrapping one layer around the other (the picture does the job better than this description honestly):
Supports with a "beefed-up" top edge were made as shown above. The example shown would be glued to the side wall of the tube. The other would be free standing and consequently the spacer layer was extended to the full length of the first to provide greater stiffness.
The verticals were then glued into place in the box. They act as supports and create two separate compartments:
Image showing the two vertical supports glued into place.
I then constructed a tight fitting hinged lid and the resulting encasement ended up as shown in the next image:
The completed closed-cell foam encasement.
On balance I'm pleased with the result. The integrity of the joints is good. The construction feels robust enough for its purpose (it will not carry any load, that's left to the bag and webbing), it's cheap and the whole thing weighs just 30g. Most importantly I can put one together in half an hour. That means I can make several for different gear selections and can tinker with the designs until I find what works best. This first example almost certainly won't be the final design. With my E400, 14-42mm lens, 25mm fixed focus pancake lens and a couple of filters and media cards there's a lot of space over. I'm also not convinced that the lid, in its current form, will work in combination with a roll-top dry bag. I think it may get in the way when trying to access the camera through the open top of the dry bag.
Still, the most efficient way to improve the design will be to live with this one until I've identified all the glitches. Before I can do that I need to source a suitable dry bag and devise the strapping. When I next make any progress, you'll be the first to know.
Nice work there, I agree that it's difficult to get something thats right, love the coment that "almost right is basically wrong"ReplyDelete
An idea for the lid might be to make it open in 2 halves barn door style, if you put it in a Roll Top is it possible to roll the bag and rather than clip both ends of the roll together to clip each buckle down the side like some of the ULA rucksacks (Catalyst?)
Just a thought :-)
A lesson hard learned. Bought a lot of stuff that's almost right and it's when you most need it that it becomes aparent that it's basically wrong :-0ReplyDelete
Like the idea regarding the closure. Was thinking along the same lines. If the foam is stiff enough that it has atendency to stand upright then it would also help hold the mouth of the drybag open making access hat much easier. The stuff I've use this time is a bit sloppy though. This may turn out to be a long project!
in a lot of cases things are basically wrong because changes were made to make them look nice on the High Street. I'll be following this project with interest.ReplyDelete
Very nice home craft!
While packing my backpack before one of our off-armchair adventures I always find myself in the center of my gear scattered around on the floor with my SLR in my hand boggling. Probably a common sight for every backpacker. It’s a decision between good quality pictures or low weight, which equals to my Pentax D20 or a disposable analog camera without flashlight. That’s the lightest small film camera on earth I believe.
I haven’t weighed my Pentax, because I simply don’t dare. Fare chance that by knowing its weight I even skip the boggling. A camera bag on top of that would make it even worse, but your prototype gives hope.
On our first trip I used the disposable camera and made my best group picture on top of the Ben Macdui ever despite the relative high humidity at that moment.
After that I decide to use my digital compact camera for all common reasons, but never had the same surprising experience as when I saw the printed pictures a week later at the photo shop.
Some thoughts about the camera bag.
Have a look at: http://www.cameraarmor.com/. They make these armors for almost any common SLR. I bought one for my Pentax D20. Since I have this protection I never use a camera bag.
Although it is not a real expansive piece of equipment something similar and cheaper can be homemade like you did with a thinner piece of foam. Also, the lens can simply be protected by a UV-filter and a good old rubber foldable lens. Of course, remains the dry bag. This keeps me boggling for a while.
I like your blog very much, it’s a nice distraction at lunch break.
As far as I know we do not have such a word for “armchair adventurer” in Dutch. Hereby I would like to make a proposal: “Schommelstoel avonturier”.
Thim, Yes. Every time I pack I end up making some hard decisions. Last time out in Switzerland I even left the Camera at home knowing that we always end up with multiple sets of similar photos. Not a decision I'd make again though. It felt somehow wrong to be without camera.ReplyDelete
I'd seen the body Armour before (op-pad I think?) my guess is its heavy (there he goes again always banging on about weights). Would be interested to know how much yours weighs.
I remember the suspense of waiting for roll-film to be developed. It was good and bad though. Yes its nice to see the pictures some time after the trip but often (at least in my case) the results were not what I'd hoped for. One or two realy good shots per roll usualy. Digital ups my average. Besides, did you know each roll weights around 25g (there I go again). 350 shots therefore add 250g and a massive volume to you bag. Digital is the way to go. You should bight the bullet and weigh your D20. Then at least you will know how much you will have to compensate if you ever decide to take it along. Pentax do some nice little pancake lenses that could help shift the balance.
Thanks for the positive comments about the blog. I have a lot of fun putting it togther. Nice to see others appreciate it too.
To answer some of your e-mail comments here: Yes NL is not a lightweight land. Not only is kit hard to find but there's a reluctance to sell it. Carl Denig bucked the trend a couple of years back and stocked Granite gear packs. I was considering them and went along to see them in the flesh. They looked great. The salesman tried to talk me out of it. In fact he wanted me to buy a thicker mat to get a better nights sleep, a bigger bag so I could pack and get on the trail quicker and a heavy internal frame to carry the extra weight. I can imagine how novice kit selections look after a first visit to CD. CD den Haag did have an exos on display when I was there a couple of weeks ago so some LW gear does get through the filter. However, if you're serious about getting UL gear you have to look over the border to Germany or the UK. The weak pound is in your favour but you end up buying sight unseen. Just imagine, your looking at lightweight but nevertheless, pretty mainstream packs right now, when things start to get more radical you realy have to work hard to get stuff imported! NL shoud be a lightweight land by default: got to travel a long way to get into the hills, most people won't be hill-fit and with a couple of trips a year durabilty isn't a high priority, can't use full-on mountaineering gear in NL. However, it just doesn't seem to take hold here. See people walking through the bollenstreek wearing crampon compatible boots every spring!
This is awesome you making your own camera cover,ReplyDelete
now i would also have to try to do that.