Wind Chill Chart
Dec 5, 2018 09:33:37 #
bpulv
Loc: Buena Park, CA
Pixelmaster wrote:
There was an outside chance that one of my Navy as... (show quote)
So what lubricants do you use?
Dec 5, 2018 09:35:29 #
Pixelmaster wrote:
...So for those of you who
are foolish enough to ignore how easy it is to get frostbite or worse here is a wind chill
chart to give you what you need to know. This also applies to people who do aerial
photography. ...
Note that frostbite can occur in 15 minutes or less in the blue section of the chart.
are foolish enough to ignore how easy it is to get frostbite or worse here is a wind chill
chart to give you what you need to know. This also applies to people who do aerial
photography. ...
Note that frostbite can occur in 15 minutes or less in the blue section of the chart.
Did 3 winters at Malmstrom AFB, Montana. Saw -82°F. wind chill on a missile silo once. Unbelieveable. -35 ~ -50° F. wind chill was not uncommon in Great Falls. However, in the summer it is a fantastic place.
Dec 5, 2018 09:52:48 #
Dikdik
Loc: Winnipeg, Canada
Apaflo wrote:
"... can help pull the heat from the camera ..." means that wind chill absolutely does affect cameras, and in just about exactly the same way it affects humans. In either case it determines how fast terminal temperature (ambient) is reached
It will cool off faster, but if you leave a camera out in -40, with a 20 mph wind, and take its temperature, it will read -40 (I used -40 because C and F converge at that temperature). It will reach -40 faster.
Dik
Dec 5, 2018 12:59:19 #
Blaster34 wrote:
Hmmmm...if the temp is not below freezing, frostbite can't occur.
Good catch! Hypothermia, not frostbite, is what he should have said.
Dec 5, 2018 13:08:23 #
Dikdik wrote:
It will cool off faster, but if you leave a camera out in -40, with a 20 mph wind, and take its temperature, it will read -40 (I used -40 because C and F converge at that temperature). It will reach -40 faster.
Dik
Dik
When a warm camera from inside is taken outside into -40 ambient temperature it will cool to -40 faster if the windchill is lower. E.g., a 30 MPH wind will cool the camera faster than a 3 MPH wind.
Dec 5, 2018 13:17:46 #
Dec 5, 2018 13:28:28 #
Screamin Scott wrote:
https://www.weather.gov/media/ict/handouts/WindChill_HeatWave.pdf...First paragraph....
Bad link.
Dec 5, 2018 14:49:41 #
tiphareth51
Loc: Somewhere near North Pole, Alaska
I think one of the major points being made by the poster is hypothermia and how easy it is to be affected by frostbite. Unfortunately that point seems to have been missed. Anyone residing in Alaska should be aware of this especially during outdoor activities. There are times while photographing ice art and Aurora that my time outside has been very limited due to the cold factor.
Dec 5, 2018 14:55:45 #
bpulv
Loc: Buena Park, CA
Pixelmaster wrote:
Gee if my posting about wind chill got this much interest maybe my next post should concern
why do we need to go to Mars.
why do we need to go to Mars.
Pixelmaster,
You said in your original post that you were trying to determine which lubricants to use in your camera for antarctica use. What lubricants did you arrive at and would they be of any use to those of us that are not planning for that extreme of a climate? Also, where in the camera do you replace the lubricants with the cold weather lubricants?
Dec 5, 2018 15:01:24 #
Unfortunately, E.L., I can't comment on Hell. The devil has a restraining order on me.
--Bob
--Bob
E.L.. Shapiro wrote:
Greeting from CANADA! br br I will not even atte... (show quote)
Dec 5, 2018 15:26:53 #
In my preparations back then I contacted Nikon where they said that they could remove the standard
lubrication and replace it with a cold weather lubricant. I never did find out what they used to do that.
There is a lubricant today made by Interflon, a Dutch company, called Fin Super which is a dry lubricant that
uses encapsulated Teflon. Most end users of the product cannot believe how effective it is until they
try it. Most European police use it in all their weapons.
lubrication and replace it with a cold weather lubricant. I never did find out what they used to do that.
There is a lubricant today made by Interflon, a Dutch company, called Fin Super which is a dry lubricant that
uses encapsulated Teflon. Most end users of the product cannot believe how effective it is until they
try it. Most European police use it in all their weapons.
Dec 5, 2018 16:22:44 #
bpulv wrote:
Pixelmaster,
You said in your original post that you were trying to determine which lubricants to use in your camera for antarctica use. What lubricants did you arrive at and would they be of any use to those of us that are not planning for that extreme of a climate? Also, where in the camera do you replace the lubricants with the cold weather lubricants?
You said in your original post that you were trying to determine which lubricants to use in your camera for antarctica use. What lubricants did you arrive at and would they be of any use to those of us that are not planning for that extreme of a climate? Also, where in the camera do you replace the lubricants with the cold weather lubricants?
Replacing the standard lubricants is no longer necessary or even useful.
Today's standard lubricants are Arctic grade synthetics that are far better than what was used a few decades ago.
Dec 5, 2018 17:35:47 #
Sure wish my camera and lenses had grease nipples so that I could change lubricants myself.
But seriously, I don't think it is necessary unless it is REALLY cold out there and the camera gets into equilibrium with the environment. When I do outdoor winter photography I generally keep the camera under my coat, pull it out for a few minutes while shooting, and tuck it back away again. I used this approach many years ago for a 1 week stretch of outdoor "camping" (actually, a military exercise) in Resolute Bay (i.e., never entered a warm environment; ambient temperature never above -35C). My biggest concern was the film cracking if I would have let it get cold. And today's biggest concern is probably battery life in the cold, so keep them warm in an inner pocket.
But seriously, I don't think it is necessary unless it is REALLY cold out there and the camera gets into equilibrium with the environment. When I do outdoor winter photography I generally keep the camera under my coat, pull it out for a few minutes while shooting, and tuck it back away again. I used this approach many years ago for a 1 week stretch of outdoor "camping" (actually, a military exercise) in Resolute Bay (i.e., never entered a warm environment; ambient temperature never above -35C). My biggest concern was the film cracking if I would have let it get cold. And today's biggest concern is probably battery life in the cold, so keep them warm in an inner pocket.
Dec 5, 2018 19:26:38 #
Be aware that wind chill is actually rather more complicate than that simple chart. As I understand it, the chart was developed using a simulation of a finger exposed to the air. Any clothing or other measure that prevents that exposure will reduce wind chill. And other body parts, being larger, will cool slower. As a mountaineer and mountain rescue volunteer I've been in some rather nasty storms and found that proper clothing for the conditions will prevent the effects of wind on my body temperature. That said, wind still drains energy as it takes more effort to fight that wind.
Dress in layers with a wind-blocking layer on the outside and insulating layers within. Do not over dress to the point of sweating since wet clothing loses insulation value and may even cause cooling. And remember to cover your head in the cold. The head gets priority on body resources and by nature the head and neck are not well insulated. A good balaclava and hat can prevent cold hands and feet since if the head and neck waste heat there may be none left for hands and feet.
Dress in layers with a wind-blocking layer on the outside and insulating layers within. Do not over dress to the point of sweating since wet clothing loses insulation value and may even cause cooling. And remember to cover your head in the cold. The head gets priority on body resources and by nature the head and neck are not well insulated. A good balaclava and hat can prevent cold hands and feet since if the head and neck waste heat there may be none left for hands and feet.
Dec 5, 2018 19:57:59 #
The problem with the formula is that at 0 F and 0 mph the wind chill is 35.74
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