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    Focusing problems

    Well, here in upstate NY in December, all I have to do is take it outside and exhale!!!!
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    Focusing problems

    No, I never removed the lens from the head. I have since gotten the beam to a finer focus. Maybe I am being unrealistic by comparing the best focal point of this laser to that of my 3 watt blue unit. That thing focuses down to a tip of a needle point....
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    Focusing problems

    The head makes 6 complete revolutions from being all the way in to just before it becomes loose and will come off. The lens within the head will make at least 6 full turns, if not more. I have counted the full extent of travel of the lens within the head. With the combination of the two; there...
  4. F

    Focusing problems

    The glue wasn't too hard to overcome. There is plenty of travel for the lens within the head. It's going to be a matter of trial and error to zero-in on the lens position to get the focal point that I am looking for....the one that should have been pre-set by the manufacturer.
  5. F

    Focusing problems

    I believe you are correct. I will continue to close in on it. Thanks
  6. F

    Focusing problems

    I just put a beam expander on it and was able to get the tiny focal point size in front of the laser head like I did with the 3000mw Sanwu blue unit.
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    Focusing problems

    That is the goal, exactly!...I can get a tiny point on the wall, 8 feet away, but I can't seem to get the same focus a few inches ahead of the aperture.
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    Focusing problems

    For the person who asked if there was enough threads to adequately move the lens in and out; there seems to be plenty...and I was able to easily "break" the glue that was originally securing the lens. I can adjust the lens or head, or a combination of the two, so there is a very wide spot on the...
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    Focusing problems

    I have a fairly new GX3, 200mw green laser that I bought from Big Lasers. My current guess is that I over-payed for this unit.... It has a strong beam and I don't dispute it's advertised power. The problem I am having is to get it to focus to a focal point. I also have a 3000mw Sanwu blue laser...
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    focusing a Sanwu 445nm, 3000mw

    Well, the correct, 16340s will be delivered by this Saturday. I tried a few days ago with a black balloon and nothing!....then I used my 200mw 532nm green and it popped almost instantaneously....I will try again with the correct batteries and focus it as you suggest...then see where I go from...
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    focusing a Sanwu 445nm, 3000mw

    Toward the end of this week, I should have the 16340 batteries for this laser....I will re-try everything with them and then decide if I got screwed over buying this thing from Sanwu.....I have been using non-rechargeable CR123a's while waiting for the 16340sw to arrive....maybe they ren't...
  12. F

    focusing a Sanwu 445nm, 3000mw

    Well, I already contacted them regarding my dissatisfaction....I will wait for the 16340s to arrive, try it out then see where I am with it all.....
  13. F

    focusing a Sanwu 445nm, 3000mw

    It's supposed to be a 304 housing. It requires 2, 16340 batteries....Until they arrive, I am using CR123a batteries......same voltage....could that be the issue???
  14. F

    focusing a Sanwu 445nm, 3000mw

    It's not so much the shape but the lack of power and the size of the smallest dot that I can get it to focus too....I have a 200mw green unit that can easily pop a black balloon, this new 3000mw unit can not....that does not seem correct....
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    focusing a Sanwu 445nm, 3000mw

    I don't beleive that a picture of a rectangle will be that helpful.....in addition to the lack of ability to form a tighter focal point, my other disappointment is that my existing 200mw green laser can easily pop a black balloon. The new 3000mw blue laser just puts a small, square dot onto it's...
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    focusing a Sanwu 445nm, 3000mw

    I just received a Sanwu blue, 445nm, 3000mw laser today. When I focus it, ...it's either a dot or it goes to a large rectangle in either direction very quickly. Is this normal for this laser? With my Dragon Laser 2X beam expander, it reduces it to a nice small beam..... does this laser require...
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    Focus problems

    That sounds like a possible plan if I don't get satisfaction from Colin of Big Lasers. I do not want to void any warranty that is in effect however...
  18. F

    Focus problems

    have a new GX3, 532nm, 200mw laser that I purchased from Big Lasers in July. It was advertised as focusable, but I can not get the beam to do anything but diverge as I rotate the head outward. I have been work at this for 3 months, but no focal point/waist. I also bought the 2X beam expander...




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