Use a laser pointer as a focusing tool?

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asked Oct 16, 2021 in H&E by jackery (440 points)

But when photographer Adrian Onsen used Canon 40D to use auto-servo focusing in low light, he found that the focus assist lamp would only light up once before the first focus, and would not light up when refocusing afterwards. To solve this problem, he disassembled a laser pointer, added a defocusing lens to scatter the light, and then installed it on the camera's hot shoe as an auto-focusing aid. ,

By emitting a Green laser beam to indicate stars, it is convenient to explain the constellation to others. At the same time, it can also be used as an indication of the North Star, which is convenient for the equatorial mount and the polar axis. The green laser is generally a semiconductor laser. It has a certain working temperature of 10-40 degrees Celsius. The brightness will be weakened or not bright if it is below 10 degrees Celsius. Many people think that the battery is dead or the laser pointer is broken. In fact, it is not. Keeping warm in your clothes pocket can prevent this from happening.

Anything that can emit light, such as flashlights, mobile phone screens, etc., can achieve unexpected effects with objects that refract or scatter light, such as colorful beverage bottles. There are also props for light painting photography. According to your liking, you can use the laser 20000mw to draw various shapes of light painting on the back of the model.


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