– Sigma BF costs about $2,199 on Amazon and stands out with a minimalist aluminum unibody, a large touchscreen, touch-sensitive buttons, and a small OLED secondary display.
– Kolari’s teardown shows an aluminum chassis, a rubber bottom cover with ten screws, and a rear display glued into the body that can be removed with heat.
– Disassembly is time-consuming, requiring removal of many small boards, ribbon cables, and screws before reaching the mainboard and full-frame sensor.
– DIY repairs are limited by Sigma not offering end-user spare parts, despite the dense, space-efficient interior design.
The Sigma BF ($2,199) differs from competitors like the Panasonic Lumix S9 mainly due to its minimalist aluminum unibody housing. With a large touchscreen, touch-sensitive buttons and a small OLED secondary display that shows settings, the Sigma BF’s operation and design is unlike any other camera on the market.
Unconventional Build
Kolari, which specializes in infrared conversions, shows what the camera’s inner workings look like in the teardown video embedded below. While the chassis is milled from a block of aluminum, there is a rubber cover on the bottom, under which a total of ten screws can be found. Once all these screws have been loosened and a cable disconnected, the rear display can be removed.
Internal View
This is glued into the body in a similar way to a smartphone, but if the adhesive is heated with a hot air dryer, the screen can be removed without any major problems. To disassemble the camera further, numerous small boards, ribbon cables and screws has to be removed before the mainboard and ultimately the full-frame sensor can be taken out of the housing.
Disassembly Nuances
This is not particularly complicated, but it is time-consuming. Yet, in order to repair the camera by yourself, Sigma would have to offer spare parts, which are not currently sold directly to end users. The multi-layered construction of the interior shows that Sigma has used every millimeter in the housing effectively.










