G8 400-700nm Laser Collimation Lens M9x0.5 Knob for Sharp & Neje

Description

For sale is 4 New Lenses G8 Lens with knob, G8 Lens, G7 Lens, & G2 Lens to replace your original lens on your diode laser machine.
The G8 style with knob itself, the threads are M9x0.5, with a smaller lens fixed inside. This does NOT fit Ortur Laser Master's 2 Pro laser housing, and possible others like it, as the knob is too wobbly inside and will not focus well enough to stay put. This lens will fit some Sharp machines, the Neje N40630 30W, and other machines as well (any information on which machines is much appreciated). This lens is great for finer detail engraving.
I am selling the other 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)
G8 w/Knob Specifications:
Thread Frame Size: M9x0.5 (threaded end is 7/16"/11mm long)
Focal Length: 8mm
Casing Length 19mm
NA (Numerical Apeture): 0.33
Working Distance: 2.66mm
Clear Aperture Diameter: 5.4mm
Lens Diameter: 7mm
Transmittance: 95%
Coating Wavelength: 400nm-700nm
G2 Specifications:
(This lens is great for cutting, allowing more light through, has a larger beam)
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 2PM 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.