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+--- Thread: Old lens amateurs watch our for radioactive lenses (/showthread.php?tid=522)
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Old lens amateurs watch our for radioactive lenses - toni-a - 10-28-2016
There are many lenses poduced between the 1940s and 70s using thorium oxide up to 30% of the weight, now replaced by calcium fluorite
here's a list so if you have any of those watch out
http://camerapedia.wikia.com/wiki/Radioactive_lenses
Old lens amateurs watch our for radioactive lenses - Brightcolours - 10-28-2016
Thorium oxide is not replaced by fluorite.
And you do not have to watch out when you do have a lens with a radioactive element either, in normal usage they pose no extra risk.
Old lens amateurs watch our for radioactive lenses - toni-a - 10-28-2016
Quote:Thorium oxide is not replaced by fluorite.Whatever, you can use it, I won't
And you do not have to watch out when you do have a lens with a radioactive element either, in normal usage they pose no extra risk.
Old lens amateurs watch our for radioactive lenses - Brightcolours - 10-28-2016
That is fine. Just correcting your post, no reason you would have to want to use old lenses with thorium- or lanthanum oxide glass.
Thorium oxide in glass was used in normal and wide angle lenses mostly. Calcium Fluoride (fluorite) has not replaced that, fluorite is mainly used by Canon on tele primes and tele zoom lenses, and lately a few tele primes and 1 tele zoom from Nikon also use fluorite.
Old lens amateurs watch our for radioactive lenses - josa - 10-28-2016
If you use it you'll have laser eyes like Superman!
Old lens amateurs watch our for radioactive lenses - obican - 10-28-2016
Btw, radioactive lenses used in the viewfinders are much more dangerous and not even well documented.
Old lens amateurs watch our for radioactive lenses - toni-a - 10-28-2016
Quote:Btw, radioactive lenses used in the viewfinders are much more dangerous and not even well documented.
Totally agree since they put the user at risk of radiology induced cataract
Old lens amateurs watch our for radioactive lenses - backcountryskier - 10-29-2016
Cool. I wonder if you can take x-ray photos, just like those x-ray glasses of my childhood:
http://www.comicscardscollectables.com/2015/03/x-ray-glasses/
Old lens amateurs watch our for radioactive lenses - Rover - 10-30-2016
Radioactivity? Is that where the "Leica glow" comes from?
Old lens amateurs watch our for radioactive lenses - JJ_SO - 10-30-2016
Now you mentioned it... ^_^ as good as the X-rays on airports could damage the films, the radiating lens probably would have done a kind of pre-exposure, so the sensitivity was already increased. Being able to do street photography by carrying a tiny nuclear power station around, ha! MILC should use the effects so the battery are not running down so quickly.