I started by making the inner microfibre liner with bubble wrap around it:
I then made the crochet outer, using some gorgeous dark turquoise wool I bought in Germany last year and which has been waiting for a project just like this one! Its quite fluffy but that doesn't matter as the bag is lined. I added a button to close it, a carabiner to hang it from, and a place to hook the tripod onto if we are taking that too. Here's the finished product - it looks a bit strange because its empty, since I was using the camera to take the photo!
(there are a few more photos on flickr )