There are numerous laser pointers in markets, but for stargazing, 50mW green laser pointer is no doubt the perfect gadget for amateur astronomer and astronomical enthusiast.
1.Why choose green laser pointer?
As we know, there are four visible colors laser pointers in total, which are blue violet, blue, green and red. One should know that green color is the most sensitive color to human’s eyes, it is 7 times visible than other colors in the same output power. That means, one 5mW green laser pointer seems 7 times brighter than one 5mW blue violet/blue/red laser pointer. In the dark night, green color laser pointer is easily to catch one’s attention and allow you to follow the dazzling forest green line to see far away stars or constellation. It is amazing to own this tool.
2.Why choose 50mW laser pointer?
mW is abbreviation of milliwatt, which is optical output instead of electrical input. The higher the output power, the more shining the laser pointer, at the same time, the more dangerous it is. According to laser pointer safety classified level, 50mW belongs to class IIIB. This level is relatively safe to human with proper caution. And the beam is bright enough to point at stars or other celestial objects.
3.How much of a 50mW green laser pointer costs?
It is usually USD $70~80 per piece from reliable supplier.
One need to pay much attention to the quality of the laser pointer, including diode, material, cooling system, guarantee time etc. Some black-hearted manufacture use second-hand diode to gain much more profits, which hurt customer’s right and health deeply.
And one also need to notice 50mW is harmful without suitable use and protection. Do not point at eyes or stare at the beam directly and leave it from Children.
Enjoy your stargazing laser time.