I recently got back from a backpacking trek to New Zealand with my EM5, Olympus 12-50, Panasonic 20, Samyang 7.5 fisheye and Tokina 300 mirror lens. The EM5 was attached to my backpack shoulder strap using the Peak Designs capture clip (which worked great) and I carried the lenses off of the backpack belt using some cheap padded neoprene bags I bought off of EBay. These might not be the highest-quality lenses, but the weight was perfect for a multi-day trek. Although the 12-50mm was my primary lens (the focal length seems to be perfect for the majority of shots you'd want while on the trail and the macro feature was extremely handy for close-ups of plants, etc), there were occasions when I wanted to switch to the fisheye or the mirror lens (e.g. for taking pictures of birds). I found this process quite clumsy and had to get my significant other to help me by holding the lenses as I swapped them. It was enough of a hassle that I preferred to keep the lens-changing to a minimum and missed out on some great shots (including an up-close of the elusive brown kiwi in broad daylight). Does anyone have suggestions or advice for how I could streamline the lens-changing process while on the trail? Is there some sort of accessory or attachment that could be used to hold the lens that's being changed in/out? I'm aware that carrying a second camera is an option; however, that's not my preference. When backpacking you sometimes just have to travel light (one reason I have the mirror lens rather than the Olympus 75-300).