My red laser focusing problem

SPECIFICATIONS

YL-Laser 301 imprinted on body

Model No: G303-A(Red Laser Pointer)

Body color: black

Net weight: 95g

Body material: Aerometal

Switch: momentary switch

Focus mode: adjustable focus

Wave length：650nm

Output power： < 1mw

Expected lifetime: > 8000 hours

Working time: > 1 hour

Battery: 1x18650 Li-ion Battery

Laser range: 1000-8000 meters

Max brightness: > 350lm


Hello all, Anthony here and I am a laseridiot. The laser I purchased worked very well and I am also very careful to protect myself, others and animals while experimenting with my new laser. I had the laser in a pocket and lint got inside the light hole. Carefully I removed the pointer cover, removed the lint and replaced the front end piece. Here is my problem. The focal point has changed. The beam focus is no longer constant, it is in focus around 2.5 inches from the front end cap. I don't think I "lost" anything when I opened it. I read the end cap can be adjusted for focus and unfortunately I cannot change the beam from being 1/2 inch wide from a foot away. Thank you for any thoughts you may have to help me refocus my laser..... Anthonyvp1

Hard for me to guess, if you put it back together the same way, it should work. I guess the point is you didn't get it back together exactly the way it was. Wish I could help, I'm unable to guess. Just double check everything, make sure you have everything tight and that the lens is oriented in the same direction. I don't have one of those lasers to even know if that is possible or not, but thought I'd mention it.

It sounds like the lens is too far out.
There is usually a brass lens holder in
those that is supposed to be glued in
place, but sometimes they aren't glued very
well or at all. You have to be very
careful not to touch the lens with anything
while adjusting it.

They are sloppily built. You just need to play around with how it goes together as the focusing mechanism is really crappy. Threads are really bad on these and if you don't get it right it won't focus. You might also have that piece that moves the lens upside down. As others said, don't touch the lens.

I'd guess you moved the lens while cleaning it. Does it adjust with threads or is it just glued into place at a fixed point inside the pointer?

Hopefully it's threaded in and you simply screwed/unscrewed it a little while cleaning it and it can be moved back.