Quote Originally Posted by Poisson Du Jour View Post
Put things in perspective: how much radiation will you get when you have an x-ray? Or an MRI? Or a CT scan? In all probability, the average house has much, much more radiation in it from appliances.
http://xkcd.com/radiation/

I don't see Takumar on that list, but holding one up to your eye for 30 seconds (per frame) is probably about the same as eating a banana, (ie, SFA).