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Description
20mm CVD ZnSe Focal Focus Lens for 100W- 130W Laser Engraver CutterCutting Edge Features: HIGH QUALITY CVD ZnSe: OMTech's powerful focus lenses are manufactured from premium zinc selenium via chemical vapor deposition for superior optical properties. HIGH TRANSMITTANCE: Both sides of each lens are covered with strongly antireflective coatings to achieve at least 99. 5% transmittance rate for infrared light at a wavelength of 10. 6 microns. LASTING DURABILITY: Our laser engraver focus lenses' double sided coating
Cutting Edge Features:
- HIGH-QUALITY CVD ZnSe: OMTech's powerful focus lenses are manufactured from premium zinc selenium via chemical vapor deposition for superior optical properties.
- HIGH TRANSMITTANCE: Both sides of each lens are covered with strongly antireflective coatings to achieve at least 99.5% transmittance rate for infrared light at a wavelength of 10.6 microns.
- LASTING DURABILITY: Our laser engraver focus lenses' double-sided coating process also ensures outstanding scratch resistance for longer service life.
- WIDE COMPATIBILITY: This 20mm laser focus lens fits OMTech 100W-130W CO2 laser engravers. Please check the focal lens diameter in your machine’s manual before purchasing.
- EASY TO USE: The plano-convex shape of OMTech's engraver focal lens lets you install it easily and correctly onto your machine in the proper orientation. Detailed cleaning instructions also help you take proper care of your lens.
Specifications:
- Material: Zinc Selenium
- Color: Yellow
- Diameter: 20mm (0.79")
- Thickness: 2mm (0.08")
- Focal Length: 1.5" (38.1mm)/ 2" (50.8mm)/ 2.5" (63.5mm)/ 3" (76.2mm)/ 4" (101.6mm)
- Rec. Wavelength: 10.6 microns (10600 nm)
- Min. Light Transmittance: 99.5%
- Net Weight: 0.2 oz (5g)
Summary:
It is all smoke and mirrors! As you engrave, debris such as smoke and dust land on your focal lens, building up a layer of residue over time that absorbs laser beam power and can stain the lens permanently. Eventually, this lost power will affect your machine’s precision and throw off your laser settings. To keep your device running at its full potential, we recommend inspecting and cleaning the optics system once a week and replacing the mirrors or focal lens as soon they get damaged.
Package Includes:
1 x CVD ZnSe Focus Lens
Warranty:
- No need to worry! We offer a 1-year warranty on all focal lenses.
Certifications:
- FDA Compliant
- CE Certification
- ISO9001 Quality Certification
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 1
Rancid, Nasty, biltong shavings
Flavor Name: Traditional, Size: 4 Ounce (Pack of 1), Flavor Name: Traditional, Size: 4 Ounce (Pack of 1)
This Ayoba Biltong has an OK flavour, but the black pepper is excessive. About 20% of the shavings are rancid, which means that every 5 shaving pinch you put in your mouth is practically guaranteed to have a rancid flake. The rancid flakes are bitter. acrid and foul, and this nastiness completely overpowers the biltong flavour, even the excess black pepper taste. I believe the rancidness comes from the white bits of fat attached to the meat, but who wants to sort and clean these biltong bits?
DO NOT BUY!!!!
FYI - I grew up in Swaziland and Botswana, and ate pounds and pounds of biltong. I even made Biltong while deep in the Okavango Delta.
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Reviewed in the United States on February 1, 2026
★★★★★ 5
Flavorful
Flavor Name: Traditional, Size: 2 Ounce (Pack of 3)
Best jerky ever I love everything about it!
Jeff Johnson
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Excellent flavor and texture to this jerky with no sugar makes it my new favorite
Flavor Name: Traditional, Size: 4 Ounce (Pack of 1)
I have recently adopted a low carb, high protein diet combined with weight training, so I'm always looking for new sources of protein. I use protein powder as little as possible, and eat more from natural sources.
I have a brand of beef jerky I really like, but traditional beef jerkies have a lot of sugar (10g protein to 6g of sugar). Biltong, however, has more protein per oz (16g) and 0g of carbs or sugar. Simple ingredients, and nothing funky. So a big win on the nutrition front.
That is great, but what won me over was the flavor. It has a nice hearty flavor, and has a little wetness to it that makes the texture nice to chew. I have tried another brand of biltong, but I found it too dry for my taste (kinda of like chewing on plastic). So another win on flavor and texture.
Pricing is okay. Good beef jerky is not cheap, so you get what you pay for. I would like to buy in bulk, so bigger packages with better discounts would be a good offer I would jump on immediately.
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Reviewed in the United States on May 22, 2019
★★★★★ 5
I stay on your foot they don’t slip in your shoe
Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium
This is the only socks I wear Under Armour because they stay in place I wear a size 8, but they’re more comfortable with a large instead of a medium, but I wear both because I have them already and you can pull them to stretch them out a little bit
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Great fit, truly doesn’t slide off heel
Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium, Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium
I’ve scoured all the lands looking for a no-show sock that was 1) thin, 2) quality, soft, breathable material, 3) didn’t dig into my feet/heels, 4) doesn’t shrink, and most importantly 5) stays on the back of my heel without a bulky non-slip rubber piece and these check all the boxes! Perfect for low profile women’s work shoes like Keds, etc. Not low enough for most flats though. I wear a women’s size 9.
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Reviewed in the United States on April 19, 2025