The frozen gas hitting your focusing screen will spiderweb it. Hitting
your mirror can remove the silver, On a sensor it probably won't do the
glass cover plate a lot of good either.
That said, I've never had a problem using a name brand, that produces a
relatively soft stream of gas. I prefer 3m because Sam's Club sells
three packs for a considerable savings over what you'd pay for a similar
product in most other stores. I've never had one of their cans expel
the frozen gas if handled as directed. In fact it takes quite a bit of
mishandling to get that to happen.
I've also used Falcon Dust Off, which was quite expensive, but the
only game in town really for a long time. Never had a problem with them
either. When I was using it to blow dust off negatives I had a few
bargain brands spit frozen gas onto the negative.
On 3/27/2014 10:02 AM, Bill wrote:
One of the things that will turn grown men into mewling kittens is any
mention of using canned gas as a dust removing method for cameras.
Don't do it, they say, it is instant death for your camera. Sometimes
so stridently that one would think they were having kittens.
But really, how unsafe is it? What is the very worst case scenario?
How about a blast of liquid straight from the can?
I invite you to watch a short 1 minute (very amateur) video. The
white blast at the 15 second mark is a blast from an upside down
canned gas container being unloaded into the mirror box of a Pentax
*istD camera.
The camera suffered absolutely no ill effects from this abuse.
https://www.youtube.com/watch?v=fI3rk1sAPxc
as always, have fun.
bill
--
A newspaper is a device for making the ignorant more ignorant, and the crazy,
crazier.
- H.L.Mencken
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