Holster for SONY RX100M3 that can be attached to the backpack

thingiverse

Here's a holster for your SONY RX100M3 that attaches to the backpack. A hole is provided to secure a strap for easy removal. Attach the holster to the backpack with a cable tie. To attach a belt, it must be 4 cm or less in width and 3 mm or less in thickness. In this case, you can attach it directly without any additional hardware.