Of course I do not trust answers, you gave me the thing that I needed. You said that good optics will increase 5% in performance… that is all I needed and also I wondered if is there any lens that can help by 7% maybe…Then @ednisley started saying that optics can not help if my tube is broken and also started calling the lens I mentioned that according to internet are robust and durable fancy lens. Of course my tube is not perfect, it is old, it worked in hard condition, I do not mind changing it any time soon because it still cuts and makes me money. Also the time has come to change my stock lens I would rather give 20 euros more for the “fancy” lens, because even if that lens is only 5% better, durable, robust - any of it - than the cheap and stock one I do not care considering the small difference in price. I am awere that the new tube would make a huge difference in performance, but that is not what is this topic all about. It is about the best quality focusing lens.
I understand perfectly well that you want to buy the best, that’s excellent. The only thing I would like to note in this context is that you most likely will not see any difference whatsoever by switching from a clean standard lens to a clean, more expensive lens. They both get dirty just as quickly and last just as many hours.
I don’t think about the price difference either, but I also don’t want to buy distilled water at the pharmacy.
It’s just well-intentioned experience I want to share and it’s not a religious war.
So if you feel and believe that it benefits your laser business, buy the most expensive optics you can get.
have been using a 4 inch lens for a few years now, Nice results and much more tolerant of focus (tolerates +/- 1/8 inch or more with no visible difference. Still gets sharp lines.
I am a believer in Moly mirrors as well. Recently had a gold coated mirror #1 burn out (had not cleaned it in a long time - my bad.) replaced it with a moly mirror and picked up where I left off. Moly is metal, tough and handles routine cleaning well.
