It is worthwhile to remind of the OP;
So I was outside today for a quick shoot it was about -16 degree celsius, I got through one roll of film and then couldn't shoot another picture, after changing film the camera kept saying starting app.. and would shut off and on again. the shutter wouldn't go at all. Very weird, I tried changing batteries and removing and replacing the lens, which didn't help at all. Also manually shutting of camera off and on again didn't work. I'm very surprised that such an expensive piece of gear couldn't work in the cold, although I guess the camera is meant for more studio use. Any ideas?
The point is about the relevance of advising others about an important purchase decision based on information that you have not validated yourself.
Clearly none and I applogize for having reacted to Anders' DSLRs comments in this MF thread.
Note that I didn't write anything about the Hy6 though. My comments were purely about the importance of proper weather sealing in some situations.
The OP did not request advice for a new camera to purchase.
Your comment "based on information that you have not validated yourself" is false accusation and offensive. Same as you do, I speak of my experience. However I speak of experience from owning and using Hy6 and having owned a number of medium format cameras (which you have not, per memory you only had ZD). Plus Leaf backs which I have owned over nearly five years and find flawless in any condition I have taken them.
Regarding DSLR, I mere hinted that you should perhaps stay with that because that seems what you all over LuLa like to write of (including that stitching technique that shows up in nearly every thread you can remotely write it). I politely do not share your opinion or means.
You asked for advise for your camping in snow... perhaps following (from above) can help, along with simply leaving it in a bag until the camera's temperature is same as outside where you wish to photograph?
Took mine on a jaunt to the Amazon headwaters, walking through jungles. Nary a problem. of course, had to keep a towel handy to keep the drips off the camera (mostly). Each night it went in a dry bag with desiccant to dry out. I think that's pretty important, especially with several days in 90%+ humidity.
Its also been out in the cold in Chicago as well for New Years day in the wind below 30º as well. But did have a mirror lockup problem once on a shoot and it wouldn't come down at all. I sent it back to the guys in Germany to fix. Alls well now.
Your two posts above invited me to write to defend my opinion --- thus to waste my time. I appreciate if we can avoid such and mere stick to facts in future. After all I did reply to you politely with my experience for you in a thread on D800 recent, even though I really do not like or care for DSLRs myself, but I do recognize that everyone do not prefer same tools as I do.
I maintain to all readers that per my experience the key is to maintain gear proper protected and shielded against weather elements and one have none or few problems. If however one need to shoot in extreme conditions to choose a camera wisely, and for medium format then perhaps a mechanical camera such as an Alpa, Cambo and the like, which may well beat a DSLR due to humidity and condensation... Do some research!