I read this article in Petapixel about old radioactive lenses and I realized I have one of them!! So I gave it a try with a portable geiger counter I bought in Japan a couple of years ago.
I’m not an expert on the matter, anyway the normal safe level is 0.05μSv/h and the lens was 5.00μSv/h It’s not dangerous, but it was cool to see that indeed they made these lenses with some radioactive elements.
Based on this question posted on the website of the Health Physics Society, the element used was thorium to increase the index of refraction of the lenses. Based on the answer the use is safe and in their own words:
…the dose rate near the viewfinder of an old Pentax camera of mine (Super Takumar lens) is roughly 100 microrad per hour—approximately ten times background. In other words, looking through the viewfinder of this camera for one minute results in the same dose that I receive every ten minutes when not using it. I would have to hold this camera up to my eye for several million hours to exceed the threshold dose for cataracts…
I’m happy with this lens, in fact the optics of Takumar lenses is great! I use it with an adapter for Nikon to shot video and they work great.
Remember that the world is radioactive and it’s natural to live in a radioactive environment, as far as we don’t surpass certain limits. Anyway if you have a Takumar lens or any other old lenses that you feel afraid to use due their radioactive nature, please send them to me I will be more than happy to keep them safe :)
Check the video bellow to see it in action:
Since I released Photographers Rights I didn’t think too much about download numbers. I spent some time to compiling some charts and pies to show you how the app did since the beginning of time. In total the app was downloaded since november 2011, 25,820 times until today (July 12, 2013).
I released a new version in June 21st 2013 and 6,918 people downloaded the update. That’s just 26% of all users. This is not an app that you will use daily, but you will love to have it when you need it.
The app was downloaded from all over the world but I just added the main downloading countries. Thailand downloaded a lot, that was quite a surprise, thanks Thailand! :)
Actually there is an Indiegogo campaign to improve this app. You can help me a lot by sharing this campaign in your social networks. It’s a good app for photographers and it’s free but it really needs some of the improvements I listed in the campaign: http://igg.me/at/photorights/x/3186601
This is a drawing based on one of my pictures by Henna Salonen, check out her Deviantart page. I felt really good to see that a young artist got inspired by one of my pictures, so I’m sharing this with you here. To be honest I prefer her representation than my original picture, she gave it more mystery.
Here is the original picture:
Funny video made by Sagawa Electronics, they manufactured only 5 at the moment.
The development of this kind of technology is pretty interesting, specially for elderly or physically disadvantaged people.
Video Link: http://youtu.be/beKkf8Oo0GU
Sagawa electronics (Japanese): http://www.sagawaelectronics.com
Contact form: http://www.sagawaelectronics.com/cgi/sendmail/question/form.html
I started an indiegogo campaign to improve Photographers Rights App! Check it out here and please share this so we can reach the goal! :)
Android version, English proof reading, iPad version and more!
Thanks for your support!!
I have a 2011 Mac mini. It was initially a server model, but I’m not using it as a server anymore. These are the specs:
- Processor 2 GHz Intel Core i7
- Memory 8 GB 1067 MHz DDR3
- Graphics Intel HD Graphics 3000 512 MB
- Software OS X 10.8.3
- 2x500GB 7200RPM disks
Continue reading Samsung 840 pro for my Mac mini
Finally DevoBots is ready for sale in the App Store. Download it here!!
DevoBots is a robot builder and a music synthesizer featuring unreleased Devo music & sounds from their archives. DEVO is an American New Wave band formed in 1972 and since then it has maintained a cult following throughout its existence. It’s not only for DEVO fans, it’s also a nice toy for adults and children, allowing you to create a huge number of robots accompanied with electronic loops recorded back in the 80’s with analog synthesizers. Continue reading Devobots available in the App Store!!!