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Optics are good. Yes, focusable. I did quick cleaning and just some minor dust specs are left. If you are extra picky and want to get them too, you could separate the two halves ( its how you focus, just keep turning until it separates and reach glass elements from inside side. The dark epoxy...

This is a smaller diameter 10x Beam expander I used a lot with 532nm Optotronics RPL500. Since I do not have specs more than whats written on the original wooden box shown on photos, and I have no use for it anymore, it can be yours. Entrance aperture 5mm Exit aperture 22mm contact me if...

Flexing is not an issue. But as I said, choose your own particular ruler. There are a lot of different thicknesses and widths that can accommodate your setup. I say there is no flexing because you will cut the ruler to only 5-6cm long, at which length you are already pretty stiff to begin your...

Hi Cenobite9 you can get them on Amazon in different widths, lengths and increments. I wouldn't pay more than 10$ for one. Better ones you can buy from machine shop stores. here is an example of super cheap pair from Amazon...

Nice. I've ordered some more glass to test. I have to try two more combinations before i settle. Hope they come today or tomorrow so I can test tomorrow evening at work.

Yes, its still with NUBM44 diode. The extension with anamorphic cylindric lenses is being redone now. The first time when I started this thread I did bunch of tests but never closed the assembly and called it a day. Now I hope to do it finally. Too bad no new more powerful diode came in the mean...

Nope, same setup. Flat sides facing eachother. Makes it easier to align quickly yet manually. I thought I did and I believe i mentioned it on the first two pages of this thread. Its been a while. However, I might have been experiencing missalignment or simply not an optimum distance which...

Yes, I have a good way of monitoring the alignment of the beam as I'm setting up the glass. My two cylindrical lenses are now solid in place. All that considered, the final plano-convex lens in the front is the one I need to get in perfect position. With OPT thicker lens it seems to be much...

Very nice. Thanks. Now how do you get the measurement of 4mm? The best way in my opinion is to place metric steel ruler. like the one you and I use for setting up lenses, and place it in front of the output of the laser, and tilt it so you get the beam to go over it and line up with millimiter...

So one setup is 3x+4x (combining a 3x from OPT lasers, and a 4x from Lasershow Parts) plus focusing lens in the front. The second is only 6x plus focusing lens. I assume second setup is shorter as assembly overall. Did you measure it in comparison by any chance? Which produced better...

Nice work Accuronitis! Nice to see you took over with experimenting and are contributing for everyone. What is your lens setup used to make that burn mark on wood at 65feet on the last photo. Also what power output are you set to? thanks

Thanks. I checked the beam throughout the path from laser to 10m wall and it only slowly diverges at 0.4mRad rate. No converging.

So after having now tested 6x, 9x, 12x and an 18x squeez of the NUBM44 diode beam coming out of the G2 lens, the clear winner is a 12x setup combining one OPT Lasers 3x Plano Concave lens flat back to flat back against one 4x Plano concave lens from Lasershow Parts, and correcting this beam with...

Ok, here is the setup I used combining a 3x from OPT lasers, and a 4x from Lasershow Parts. Basically it gives the best squeeze of the beam for this diode out of all I tested so far. I tested them with Lasershow's, and then with the OPT's plano convex lens on the front. Here is setup with...

After long delay, ( working on it about 1.5h per week or per two weeks) I had major sucess, and most likely a final setup I will stick with. I'm getting 0.3-0.5mRad !!!!!! Here is a nice shot I tok on the end of the experimentation session on Friday. I will post more results and photos of the...

Thats cool. No, I'll stick with what i have for now. I have 4x squeeze lens coming in and this is is. I am looking forward to test it with my OPT Lasers 3x and 2x lenses and produce 12x squeeze. I can't wait to see the form of the beam at this ratio. I will be able to do a 16x test as well...

Thats nice. Do you mind checking power output and if it is indeed as good as the G2 from DTR shop? Also, could you project the line at distance X (something like 5 or 10m) and measure the length of the projected line. Kind of like what i did at the beginning of this thread. Photo would be nice...

In order to achieve best possible beam, you have to focus G2 as best possible against target as far as possible. Not have it converge at 5m. Convergence is imediately followed by divergence and not just tighter beam for the next set of lenses. This will deffinitely be a limited useful range...

Thanks for the tests. Interesting convergance issues. Maybe it is best to simplify and start measuring slowly. I have convergence issues only at about 10feet when doing 9x squeeze using two 3x concave lenses. Lets maybe set the distance at 10m and see exactly what best you can get projected at...