A recent discussion with an amateur astronomer about filters gave me an opportunity to describe the way filter transmission values are related to their designation in terms of “density”. While thinking about this, I realized that describing filter performance in terms of “density” is not an obvious concept, nor is it even convenient if the person buying a filter does not know the method behind this and worse, might not be comfortable using logarithms. That’s because density designations invoke some mathematics in the form of Briggsian logarithms. There is also a rich history of photographic science behind all this.
Somehow this made me think of creating a video tutorial to explain the subject of filter transmission and its relation to density. OK, the truth is, I do enjoy doing audio and video editing; so, it was a good excuse for making a video. I jumped right into that. It turns out that doing a good video tutorial takes quite a lot of time and work, if you are a perfectionist like me, whose motto is: “Do good work”.
I’m into this for real. No going back. A video about this will be forthcoming, as soon as I finesse the production to my standards. I already created a bit of original electronica music for the intro and outro parts. That was fun!
Optics Lab Tips and Tricks 