Onboard Stills Cameras DIY Camera Payload Construction The camera used as an example here is an Chinon AP 300S APS compact camera, with an electronic shutter release. It fits in a 2.6 inch diameter airframe, and costs £20.00. The following will provide a step to step guide for how to build your own APS camera payload for rockets: Step 1: Dissasemble the camera Step 2: Locate the switches Step 3: Modify the focus lock switch Step 4: Modify the shoot switch Step 5: Modify the x switch Step 6: Modify the y switch Step 7: Attach the DIL switch Step 8: Test Step 9: Fit in assembly Step 10: Fit in rocket