They are rather expensive (I know, no price on eyesight..) so I thought I'd try various cheaper ones first, sending back those that are no good.
But what will be good / no good?
I wondered if there was any chance of people kindly donating pairs of comparison pics of: A beam hitting a white target, and: The same but with the beam having passed through one of their (known to be good) spectacle lenses on the way? Together with the specification of the glasses? So that I know the kind of attenuation I should expect?
At the moment I'm using a 650nm red, but may move to blue for greater burning power.
It would no doubt be useful to other people, too.
Thank-you very much!
g
But what will be good / no good?
I wondered if there was any chance of people kindly donating pairs of comparison pics of: A beam hitting a white target, and: The same but with the beam having passed through one of their (known to be good) spectacle lenses on the way? Together with the specification of the glasses? So that I know the kind of attenuation I should expect?
At the moment I'm using a 650nm red, but may move to blue for greater burning power.
It would no doubt be useful to other people, too.
Thank-you very much!
g
