Other way around, glass steams up when it's colder than the humid air
I think the common tendency is to try to keep gear warmer than the ambient temperature. Aside from battery issues (not an issue here, obviously) it is better to let the gear be *at* ambient temperature.
Jim MacKenzie - Regina, Saskatchewan, Canada
A bunch of Nikons; Feds, Zorkis and a Kiev; Pentax 67-II (inherited from my deceased father-in-law); Bronica SQ-A; and a nice Shen Hao 4x5 field camera with 3 decent lenses that needs to be taken outside more. Oh, and as of mid-2012, one of those bodies we don't talk about here.
Yes. There are products out there to prevent fogging. Rain-X makes one.
If treating the glass isn't enough, you might try to find an oversize drinking straw (sometimes called a "wide" straw) as an easier to carry and use alternative to a snorkel. An ice cream shop might have just the thing for milkshakes and other thick drinks.
Soap. Use a glycerin soap and rub it dry on the GG then buff it off. You can moisten it a little, but not wet - buff off when dry. It doesn't last forever of course, but it works and it's cheap.
Don't use it on your lenses of course.
Pentax used to make an anti-fog lens cleaner but I haven't seen it in a while. It also left a visible residue on the glass 9as it must to work), but it would clean off with regular lens cleaner or alcohol.
Y you might try to find an oversize drinking straw (sometimes called a "wide" straw) as an easier to carry and use alternative to a snorkel. An ice cream shop might have just the thing for milkshakes and other thick drinks.
ok ... never thought of that ... although I do have some which I use with some blue-tac to sure up the front and back standards to minimize vibration sometimes.
Theory: you understand why it should work but it doesn't Practice: it works but you have no idea how
Here theory and practice meet, things don't work and I don't know why
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There was a product called fog off. It was an orange waxy stick that you rubbed on glass, then buffed. It worked really well, even filled in tiny scratches on my plastic eyeglass lenses. Alas, I haven't been able to find it again. The latest stuff I use for anti-fog is called Cat Crap. It's a paste and works similarily to the fog off product. It is available in safety supply stores.
Quite a few suggestions - some insane :-) but why not go to your nearest ski shop and get a little bottle of whatever fluid they sell to spray/wipe on the inside of ski goggles to prevent fogging. Saved me from impacting trees at Thredbo many a time!