Originally posted by MJKoski I was able to continue shooting without those functions. That did not stop me but ruined a sensor shift panorama for one scene.
I stop photography at -40C if wind picks up. Not fun anymore after that.
And yes, shutter sound changes somewhat. It becomes hard "clack" with sharp accent. 1Ds3 did the same.
This is mostly due to the presence of the damping material used. That material is usually foam that tends to harden and become less pliable with colder temperatures and ends up offering a harder than desired surface for the mirror slap.
---------- Post added 01-11-17 at 10:12 PM ----------
Originally posted by MJKoski How is your K-1 working in the cold? Yesterday the IBIS unit failed completely after being exposed to ~ -28C for 4 hours or so. PS would not start exposure, sensor shift did not respond to controls and shake reduction did nothing. It started to work again today after warming up in the bag overnight. It did this with full battery as well.
I would like to know if your unit works properly.
Its not IBIS that failed. Its the battery. You need to use specialty li-ion battery for that low a temperature. I understand your argument about it being a full battery. .. so allow me to explain. Li-ions discharge at -20degrees. Even if they don't their internal resistance becomes much higher dramatically reducing their C rating (the ability to supply sustained current at the specified voltage). IBIS is the most current demanding component in the K-1 and battery pretty much refuses to supply the minimum needed current to the IBIS (electromagnets). Now the obvious argument is that the battery meter icon is showing 100% so theoretically battery is full right? Correct. Battery is full and good enough to supply current just enough current to the less power hungry components of the system (you could still take pictures, its IBIS that stopped seemingly). When the battery warmed up it restored its C rating to meet the high current demands of IBIS and it worked as before.
Here is what i recommend. Try keeping your fully charged batteries warm and swap them often. LeFePO4 chemistry is more promising at low temps. NiCd AA can sustain low temperatures ad well. Use them in a battery grip. Use an external battery pack to power the camera and keep the battery pack close to your body inside your jacket. Chances are IBIS will continue to work as long as the battery is warm enough to supply minimum current needed.