G2, G7, AND G8 M9x0.5 400-700nm Laser Collimation Lens for Diode Laser Machines

Description

For sale is 3 New Laser Lenses, "G2, G7, & G8" M9x0.5 Lenses for your diode laser machine. These will fit inside most Ortur machines up to Laser Master 2s, as well as some other brand machines.
I am selling these lenses without knobs for those applications (such as most Ortur Laser Master 2 Pro and below machines) where the original knob is the best fit.
Some other lenses you see online that come with the brass-colored knob, or other knobs without a properly placed o-ring, they do not stay seated inward enough to stay in focus.
I am unsure how to install these into the newer Ortur machines as they are different, but I believe it has been done.
I have provided photos showing how to remove original lens (for most older Ortur machines and other similar applications) to place into the original knob (add a tiny dab of glue to threads before inserting new lens into knob, repeat Step 3 in reverse to install new lens. Be sure to position the lens in the correct direction)
G2 Specifications:
(This lens is great for cutting, allowing more light through.)
Casing Size: M9x0.5
Effective Focal Length: 4.02mm
Casing Length :10mm
CA: 5.1mm
NA: 0.6
Single aspherical lens
Working distance: 2.357mm
AR coating 400-700n
G7 Lens Specifications:
(This lens is great for finer detail engraving, it focuses into a much smaller shape than the original.)
Specifications:
Housing/Frame Size: M9*0.5.
Housing Length: 8mm
CA (Central Aperture Diameter)
：4
mm
Lens Diameter: 4.7mm
SD (Distance to diode
）：
5.86mm
NA (Numerical aperture
）
:0.25mm
CT (Center Thickness)
：
2.9mm
Focal Length
：
8mm
AR Coating Wavelength
:
400nm-700nm
G8 Lens Specifications:
(This lens is great for finer detail engraving, it focuses into a much smaller shape than the original.)
Specifications:
Casing Size/Threads: M9x0.5
Focal Length :8mm
Casing Length: 10mm
Lens Diameter: 7mm
Numerical
Aperture
:
0.33
Clear Aperture: 5.4mm
Single aspherical lens
Working distance: 2.62mm
Transmittance :≥95%
AR coating: 400-700nm
Shipping is FREE from the United States via USPS First Class and same business day if order is made before 11AM CST. Please understand that the post office my be experiencing delays I have no control over. Sometimes items ship at normal speeds but sometimes not.
Refunds accepted per eBay's policy only, such as item not as described. Item must be returned with good reason and in unused condition. Feel free to ask questions before purchase.