Measure Radioactive Lenses using your Phone!

[Smoli4]

There is this App called "Radioactivity Counter" available for purchase for the iPhone or Android.

This is a part of the app description:
"REAL Radioactivity counter based on a camera sensor, no extra hardware required
Radioactivity Counter
This is a real working radioactivity counter. You only need a BLACK TAPE to cover the lenses !! "

it costs about 4.5$ so i gave it a try... and... it works!

I tested all my "suspicious lenses" using this app! and only my, well known to be radioactive, 50mm 1.4 takumar went off and measured about x40 times more radiation then the ambient.

other lenses (jupiter 9, and a few others) did measure to be just a little more active then the ambient about x2 or x3 times the ambient.


so I just wanna let you know there is a cheap way to know for sure if a lens is radioactive and how much radioactive is it. ofc its not limited to lenses and you can check all kinds of materials with this.

you can read how this app works, they have videos with tests, and i also confirm it is legit.
it gave me good consistent measurements every single time, and it reacted very good when testing the 50 1.4 takumar time after time.

so just a heads up here, and if you get the app please share some knowledge of your findings

this is a link for the play store: https://play.google.com/store/apps/details?id=com.rdklein.radioactivity

[Eugen Mezei]

Are CMOS senzors sensitive to radiation? (And which spectrum?)
Or is this an April fools joke?

[s58y]

In astroimaging, when taking long subexposures (10 minutes, for example), background radiation can cause random "hits" in the images. I assume this app looks for those hits and counts them up.

There are videos on YouTube where people expose a video camera sensor to a radioactive object, and make videos of the bright flashes from the sensor. In some (rare?) cases, you can get dead or stuck pixels after doing this. This may happen more when you expose a bare sensor to strong alpha radiation, rather the than gamma radiation that this app picks up.
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[Attila]

Looks excellent indeed! Thanks!
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[Lightshow]

I don't know why people are so worried about lenses with some long half life radioactivity, it's not like you're going to lose your hair, get cancer, and die, if there was, the camera company's would all have been sued out of existence.
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[ilguercio]

[LucisPictor]

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Sets:
Leica M8 - Voigtländer Heliar 4.5/15 & Ultron 2/28 & Ultron 1.7/35 & Heliar 2.5/75, Leica Summitar 2/50 & Elmar 4/90, Jupiter-3, Jupiter-8,
Sony NEX-7 / NEX-3 - Tamron 2.5/24, Pentax-110 2.8 (18/24/50/70), Fujian CCTV 1.7/35, Hexanon 1.8/40 & 1.4/57, Schneider-Kreuznach Tele-Xenar 3.8/75, Zuiko 2.8/100, Leica Hektor 4.5/135, Sony SEL 2.8/16 & 18-55 OSS & 55-210 OSS, Sigma EX 2.8/19 & 2.8/30
Canon EOS 5D - Zenitar 2.8/16, Rokkor 2/28, Summicron-R 2.0/50, Nikkor-SC 1.2/55, Nikkor 1.8/85, Tamron 2.5/135, Elmar 4/180, Tamron 8/500,
Tamron 2.8-3.8/35-80, Sigma EX 15-30, Sigma 1.8/24, Canon EF 1.8/50, Tokina AT-X Pro 24-200 (EOS), Sigma 70-300
Canon EOS 300D - Steinheil 2.8/35, Zuiko 1.4/50, Helios-44 2/58, Jupiter-9 2/85, Vivitar S1 2.3/135
Nikon D1 & Fuji S2 Pro - Tamron 2.5/28, MIR 2/35, Jupiter-37 3.5/135, Soligor 3.5/70-220, Tamron 18-200
Nikon D3100 - Nikkor AF-S 18-55VR, AF-S 18-70, AF-S 55-200
Ricoh KR10x - Pentax-M 1.7/50, Rikenon 3.4-4.5/35-70
Nikon F - Nikkor 2.8/24, Nikkor-SC 1.4/50 a.s.a.
Asahi Spotmatic SPII: CZJ Flek 4/20, Tamron 3.5/35-70, Industar 3.5/5cm, Mamiya 1.8/55
EXA Varex - CZJ Biogon 2/58
Leica IIIa syn & Zorki-4 - (LTM lenses)

Leica C2, Minox 35 GL,Yashica Electro 35 GS, Kodak Retina Ia, Agfa Super Silette, Vivitar Ultra Wide & Slim, Adox Golf 66 and some others...
Sigma DP1s, Leica Digilux 2, Lumix LC-5 & FX37, Lumix FZ20, Canon G2, Sony Mavica 300, Fuji 4800Z + 4900Z, Oly C3030, Pentax Optio S, Nikon CP950, Sony V1 & F505 a.s.m.
Old list: http://forum.mflenses.com/viewtopic.php?t=65 (Not up-to-date, sorry!) | http://lucispictor.weebly.com | http://www.alensaweek.wordpress.com

[ForenSeil]

Cool find
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Lenses in active use:
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Samyang 8/2.8 E-Mount, Docter-Optics Olympus 100x 1.25 finite macro lens, Tevidon 16/1.8, Tominon 17/4 (10x Macro), CZJ Tevidon 25/1.4, Novoflex Macro-Noflexar 35/3.5, Minolta MD 50/1.4, Noritsu 50.7/9.5, Samyang 85/1.4, Rodagon 105/5.6, Nikon ED 180/2.8, Novoflex 400/5.6, Celestron 500mm F3.6, Novoflex 600/8
AF:
Sigma 19mm F2.8 E-Mount, Sony SEL50F18

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(German language)

[tanheis]

I measured my Takumar with my dosemeter

http://www.youtube.com/watch?v=Ep8buYMLDV8&feature=youtu.be

Got a bit over 10 uSv/h dose speed radiation from the lens.
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Lenses: Nikkor 24mm 2.8, Pentacon 30 3.5, SMC Takumar 50 1.4, Nikon 50mm 1.4 AI-S & non-AI ones,Olympus OM Zuiko 28/2,Pentacon 50 1.8,Industar-50 50mm 3.5(silver & black) Tamron SP 90mm 2.5, Tokina 28-85 4, Tamron SP 35-80 2.8-3.8, Zeiss Tessar 45/2.8, Zeiss Planar 85/1.4,Nikon 105mm 1.8,Nikon 200/2 ED-IF AI-S,Seimar 135 2.8, Tamron SP 300mm 5.6, Tamron SP 60-300 3.8-5.4, Tamron SP 500mm 8.0 Mirror, Zenit Photosniper + Tair-3, Canon FD 800 5.6L - EOS converted

[kds315*]

Tried it (actually two apps) and found both (even the German one!!) not reliable.
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"S'il vient à point, me souviendra" [Thomas Bohier (1460-1523)]

http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
http://photographyoftheinvisibleworld.blogspot.com/ my UV diary


Currently most FAV lens(es):

Hypergon f11/26mm
Zeiss UV-Planar f4/60mm
Lomo Уфар-12 f2.5/41mm
Nikon UV Nikkor f4.5/105mm
Zeiss UV-Sonnar f4.3/105mm
CERCO UV-VIS-NIR f4.1/94mm
Pentax Quartz Takumar f3.5/85mm
Rodenstock UV-Rodagon f5.6/60mm
Pentax Ultra-Achromatic Takumar f4.5/85mm
Voigtländer Apo-Macro-Lanthar f2.5 125mm SL

[M. Valdemar]

Maybe this app is even more useful:

https://play.google.com/store/apps/details?id=com.dexterltd.entitysensor_lite&feature=more_from_developer#?t=W251bGwsMSwxLDEwMiwiY29tLmRleHRlcmx0ZC5lbnRpdHlzZW5zb3JfbGl0ZSJd

[Smoli4]

[Smoli4]

[Nordentro]

Awesome, I have an metal detector app as well.

You shouldn't worry about radioactive lenses, but I heard some radioactive eye pieces could be dangerous because it's so close to the eye and the surface of the eyes aren't nearly as good protected as human skin
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