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Ben please be aware of the dangers to your eye sight first.
I have experience with lasers and I can tell you that those pointers are dangerous.
Even so called 'low power' ones can actually be over spec which means they may claim 1mW or 5mW but could actually be much higher.
Anything above 5mW can cause instant eye damage, before your eye has time to blink or react.
Also if they're a 'cheap' Chinese green pointer, ie: 532nm then you need to make sure it has a built in IR filter since it's pumped with an IR source to produce 532nm.
Decent ones usually have IR filters but you can't be sure unless you check or test them.
A lot of cheep pointers don't have this filter so it leaves you exposed to dangerous levels of invisible IR.
Also, the only way to know for sure about the power level is to use a proper Laser Pointer Meter.
Brightness is no indicator of true power levels.
And as we all know various states have different max legal levels, between 1mW and 5mW, nothing over and for good reason.
This all adds up to the point I want to make.
If by chance you get any type of unfortunate reflection via the camera viewfinder or other surface, even for a brief moment, you could be damaging your eyes without knowing it.
If this happens, your camera sensor is the least of your worries.
Just wanted to share, hope it helps.
Safer to just mount the pointer on a bracket and take all precautions.
Another unrelated matter, those 532nm pointers don't take kindly to the cold and may fail until they're warmed up.
Not saying don't use it but be aware or the power levels, IR dangers and the legalities.
Make sure there's no aircraft in the sky, very important.
You don't want a knock on your door from the authorities.
RB
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