DTR G2 VS Other G2 ??

[Alien Laser]

I have many G2 lens from DTR, I also ordered some from china the arrived today and the top hole is much smaller compare to DTR are this any good are the same as DTR’s G2 i assembled only one.

5pcs 405-G-2 Coated Glass Focusing Lens for 405nm 450nm Laser Diodes M9 X 0.5 | eBay

5pcs 40 5-G-2 Coated Glass Focusing Lens for 405nm 450nm Blue Laser Diodes w Holder M9 0.5. 5pcs 405-G-2 Coated Glass Focusing Lens for 405nm 450nm Blue Laser Diodes w Holder M9 0.5. They are collimating lens for blue laser diodes, can be used for NDB7875/NDB777 laser diodes.

www.ebay.com

 

[Gryphon]

Aside from looking different they are also rated differently. The "classic" G2's around here are broadband coated while the ones you have are coated just for violet and blue wavelengths

 

[Alien Laser]

I have 3= G8 + 3E + DTRG2 lens i like to replace all lasers using G2 & G8 so i need to order around 12+ since the G8 is only 1 spin from falling out no idea if should get G8 i found a website where the sell G8 & G2 lenses authentic i will do more test today on G2 & G8 and make a decision
Test done today ( Zoom 5X )

 

[Alien Laser]

I uploaded images !

 

[paul1598419]

Several years ago I purchased many G2 lenses that were broadband AR coated. They were much less expensive than these.

 

[Alien Laser]

The link i posted the G2 are very bad it's like a flashlight it burns only at maybe 3 & 4 inch the dot is like a needle

 

[Darktron]

The best g2 lens I have used are the shorty g2 their power loss is incredible. These are the specifications although they might not be accurate.

 

[Alien Laser]

I found the problem is not the G2 Lens is actually the Nubm-47 i try other G2 and same problem anyway i just use a G8