Warning: Don't use Laserpointers on your camera!

[Antal]

Somewhere on this forum I read about using laser crossline beamer TTL to align and focus objects. The system is to light with a cheap China crossline laser (5mW) in to the eyepiece of the camera. The laser beam will go trough the lens and so help to align specimen and find focalpoint.

So I machined a beautiful holder for the laser, did some clean drawings to share here on the forum and also made a nice housing for the battery.
I used it today for the first time, it helps a lot to improve speed.

BUT:
I got dead pixel since!
Altough I did laser only when mirror were down.

THIS IS A WARNING: DON'T MAKE THE SAME MISTAKE!

[JohnyM]

Sounds like a coincidence to me.

[Macro_Cosmos]

Most commercial grade sensors have at least 5% dead pixels... the camera algorithm get rid of them. The sensor, assuming unmodified, has a UV-IR cut filter installed, this blocks out effectively both UV and IR light.

Yeah, coincidence.

[Olympusman]

I have a right angle finder on the camera in my stacking rig. I can point it straight up and rest an LED flashlight on it and shine light onto the stacking subject to aid in finding and aligning the specimen.

Mike

[AlxndrBrg]

BUT:
I got dead pixel since!
Altough I did laser only when mirror were down.

How would the laser create a dead pixel on the sensor if you only ever used it when the mirror was down?

[JohnyM]

BUT:
I got dead pixel since!
Altough I did laser only when mirror were down.

How would the laser create a dead pixel on the sensor if you only ever used it when the mirror was down?

And how would it create a dead pixel on sensor if the mirror was up ?

[Pau]

I've done it several times with no issues. Chris S. , the inventor, is doing it from some years now and if there were any damage I'm sure he would had reported it.
http://www.photomacrography.net/forum/v ... 824#155824

[Scarodactyl]

Just avoid those nasty self-driving infrared lasers.