Sony 90mm macro lens video lights adapter

thingiverse

This is an adapter to mount 4-off "SolarStorm 15000LM 3xXM-U2 LED Head Bicycle Light Bike Lamp Rechargeable 4*18650" (available on eBay) on a Sony A7R3 fitted with a Sony 90mm macro lens. I don't know if it would fit on other Sony A7 models. The Bike lamps have to be slightly dis-assembled - the handlebar clip removed - which is easy to do. The bracket is secured to the camera tripod mount using "22mm 1/4"Male to 1/4"Female Socket Screw Adapter For Tripod Camera Bracket Stand" available on eBay. These lamps are powerful and four mounted as shown in the photo give approximately 9 stops of shutter speed in the Macro range 1:1 to 1:1.5. For example, in my tests, with ISO set to 800, and aperture f/16 (for depth of field), Macro setting 1:1.5 with the lights OFF the shutter speed for correct exposure wsa 1/6 sec. With the lights ON it was 1/2,500 sec. Makes videoing bugs hand possible. Here's a link to a recent video: https://youtu.be/gFJIwNrpEQo A big advantage of this approach is that the batteries are memote from the lamps. The total weight of the adapter and lamps is 547g. The total weight of the OFF CAMERA batteries is 658g.