selmslie Loc: Fernandina Beach, FL, USA

Are you using a trash bag because you can't remember to remove a battery or memory card or because you can't find a Ziploc?

Why do you suppose that removing the battery is a good idea? It's because the battery warms up slower in the camera than it does in your pocket! It's a simple matter of heat transfer. If you didn't learn that from your experience then you weren't paying attention.

I doubt that many of us here trust your advice on much on much of anything. Most of the other posts here have offered more useful advice that your meager contribution.

Apaflo Loc: Anchorage, Alaska

I avoid Ziploc bags because I know better. You obviously know nothing about this topic!

Removing the battery is a good idea if it needs to be recharged. How fast it warms up, and the mechanism for heat transfer has no significance to an intelligent photographer. Useful things that a real photographer knows!

For anyone who needs this information, it will be very obvious when put to use (or maybe even by just thinking about it for real photographers). I.g. why leaving the battery and memory card in the camera and then later removing them individually from within the bag is the safest and most expedient method.

Grow up and try to learn! You have no education and no valid experience. You could learn all about this, as I have described it in detail on the Internet many times. That includes why Ziploc bags are inferior, why trash bags are superior, why the described sequence is prefered and why it is safer.

But you seem entirely unable to learn. Jealousy does not help, lack of experience is also an hinderance, and so are the other obvious deficiencies that you operate under.

dsmeltz Loc: Philadelphia

At this point the best response is to ignore the troll until he goes away.

selmslie Loc: Fernandina Beach, FL, USA

Sounds like a frustrated rant to me!

I (and many of us here) obviously know more than you about nearly every subject related to photography and science.

We know, for example, that a charged cold battery is difficult to use. But even in a cold camera, a charged battery warmed in your pocket will provide plenty of power.

No education and no valid experience? Entirely unable to learn? My degree in mechanical engineering and several semesters in thermodynamics make your statements ludicrous. Graduating in the top 10% of my class is more than you can comprehend since you obviously have no technical college education, perhaps did not complete high school, never even understood algebra. To continue your education in thermodynamics, look up Heat capacity (specific heat). It will explain why different materials absorb heat (and increase their temperature) at different rates.

Your inability to express yourself in English is also a hindrance to your ability to communicate clearly. Did you even study liberal arts? You remind me of Manuel in Faulty Towers, "I spik inglish bery well. I lurn it from a buk."

Apaflo Loc: Anchorage, Alaska

Yes.

He is a joke, and every now and then I do just unload on him for fun. Usually there us no point in any response, as it just gets another outlandish reply in the same way is one did.

genesampson

On our trip they had candied ginger for seasickness. You can order it from Amazon if you like. Now I'm hooked on it just because it tastes so good.

dsmeltz Loc: Philadelphia

I use the Trader Joe's ginger candy for the same purpose.

orchidalan Loc: Arroyo Grande, CA

I actually have a prescription that the cruise ship suggested and recommended so I am good to go. My wife and I don't usually get motion sickness, but better safe that sorry.

RWR Loc: La Mesa, CA

Absolutely correct. It’s the same principle as removing film from the freezer or refrigerator. I use your method on a regular basis.

Apaflo Loc: Anchorage, Alaska

Experience counts! And so does being able to relate the abstract similarities from two different examples too. That is what makes your example so useful in this discussion.

gpellissier Loc: Washington

Folks,

For what it's worth, I've been to Antarctica several times, and have never had an issue with condensation when going from cold to warm (or vice versa). Part of this may be due to the very low relative humidity there. If the ship you're on has humidifiers, there may be a little condensation, but it shouldn't be a problem. You're going to have a fantastic trip.

r/

George

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boberic Loc: Quiet Corner, Connecticut. Ex long Islander

Warm air holds the same amount of air as cold air. the difference is relative humidity vs absolute humidity. while warm air FEELS dry,its because of relative humidity. A camera can't tell the difference. so bringing a cold camara into a "warm" room can cause problems, even if the room "feels" very dry.

dsmeltz Loc: Philadelphia

Warm air IS CAPABLE OF holding MORE moisture than cold air. Relative humidity (how much moisture the air hold relative to how much it can hold at a given temperature) vs absolute humidity (the total amount of moisture actually held)

Absolute humidity is the measure of water vapor (moisture) in the air, regardless of temperature. It is expressed as grams of moisture per cubic meter of air.

Relative humidity also measures water vapor but RELATIVE to the temperature of the air. It is expressed as the amount of water vapor in the air as a percentage of the total amount that could be held at its current temperature.

So at -20 and 80% relative humidity the air is holding LESS water than +40 at 90% relative humidity.

selmslie Loc: Fernandina Beach, FL, USA

The technical details are less important than the basic understanding that dew from moist air can form on any object that is colder than the dew point of the surrounding air.

Materials absorb heat at different rates and in different ways - radiation (sunlight or other radiant source), from the surrounding air (it helps if it is moving), from direct contact (cooling can be retarded by placing a camera on an insulating surface such as a bed or a blanket). Metals conduct heat more easily than plastic or other insulators.

Warm up time is important. The speed with which the camera seems to be getting warm (to the touch) can be misleading so it is better to be patient.