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What kind of lens (what material(s) should it be made of) can withstand very extreme temperature changes?

I'm trying to use a camera in temperature ranges of approximatly 60 to 400 degrees Fahrenheit

What should the lens be made out of?

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This is a cross-site duplicate post of (which is, I think, a better place for it — you're already getting good answers!) – mattdm Dec 7 '11 at 18:26
I know that, I just wanted to know if anyone here knew of something I could buy as opposed to something that would work, if it existed. Thanks though. – wizlog Dec 7 '11 at 23:26
There's a big difference between temperatures and temperature changes. Some materials that can withstand high temperatures can not withstand rapid temperature changes because of the stresses those changes produce especially in interfaces between parts and materials. Other materials/interfaces can withstand those stresses but can't survive long at high temperatures. – jwenting Dec 8 '11 at 5:57
@jwenting Thanks, but do you have any suggestions as to what type of lens I could purchase? – wizlog Dec 8 '11 at 6:00
@wizlog: What exactly do you need such a lens for? How exactly will you be using it? Do you intend to fabricate it on your own, or are you hoping to buy something off the shelf? There are few optically useful refractive materials that can withstand rapidly changing temperatures, and you also have to think about the temperature range of the material used to mount the lens elements can handle. – jrista Dec 10 '11 at 23:06

None of the big brand commercial DSLRs or compact cameras will withstand a temperature of 400 fahrenheit, they'd all be junk if exposed for more than a moment. 100 F or so is the practical limit.

Which means that you'll have to start looking for specialist industrial applications like this quick search result:

Having read your question on Physics I think a practical answer might be to remove or borrow an untinted glass oven door from an old oven, place it in front of your fire and photograph through it with a big macro lens. That's assuming you want to take pictures of a fireplace up close of course. If you want to take macro pictures of burning coal/logs then the link above is a better idea.

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Those cameras require cooling however I like your idea to using old glass from an oven. – wizlog Dec 19 '11 at 17:36

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