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Normally, you shouldn’t mount a polarizing filter on top of an UV filter. If you do, there are big chances that they will be hard to unscrew afterwards, mainly because of the rotating part of the polarizer. You will probably end up removing both of them from the camera, just like below: There are [...] 
Introduction Continuing the development of my UV exposure box I have designed and built a countdown timer. There are a few others out there for the same purpose, but I wanted to add some more features to make things better. As I have mentioned in the previous post, safety was a big concern for me [...] 
Note: Don’t look directly into the UV LEDs. It harms your eyes. This project is featured at electronics-lab.com. There is also a part two, with a timer, check it out here. Introduction I have been using the toner transfer method for about 9 years with great results. Occasionally I would need a board with [...] |
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