ISO 125; f11 at 1/3 sec. Sigma 70-200mm f2.8 EF mount Sports lens with MC-21 adapter – Could the Sigma fp be used for an assignment using flash? While I didn’t have the dedicated Sigma flash to use, I did have a group of 5 Godox radio controlled flash units that I use when I photograph airplanes and automobiles at sunset. Sigma touts the scaleability of adding third party accessories to the fp, so I just needed to get the camera and radio remote to talk to each other. The solution was an old-fashioned PC cord and hot shoe socket. And mounting the fp on a tripod for the long exposure required kept the shutter speed well under the slower synch of the camera.