Basic Info.
Model NO.
SF 1.499 Semi-Finished Flat Top Lens
Specific Gravity
1.32
Power Range
Sph:0.00~+3.00 0.00~-2.00 Add:+1.00~+3.00
Diameter
70/28mm
Transmission
> 97%
Guarantee
3~5 Years
Brand
Seesen
Keywords
Sf 1.499 Semi-Finished Flat Top Lens
Trademark
Seesen
Origin
Danyang, China
Product Description
SEMI-FINISHED 1.499 FLAT-TOP LENS
| MATERIAL REFRACTIVE INDEX = 1.499 TOOLING INDEX = 1.530 | ||||||||
| Diameter | Nominal Curve | front Radius | T.C | Back Radius | Back T.C | CT/ET | Front Sag Ring 50mm | RX Range Recommened |
| 70MM | 200B | 234.27 | 2.26 | 94.93 | 5.58 | 10/14 | 1.34 | -5.25D~-8.00D |
| 70MM | 400B | 127.62 | 4.15 | 94.93 | 5.58 | 10/12 | 2.47 | +2.00D~-5.00D |
| 70MM | 600B | 87.18 | 6.08 | 161.04 | 3.29 | 9/6 | 3.66 | 0.00D~+4.00D |
| 70MM | 800B | 66.49 | 7.97 | 161.04 | 3.29 | 13/6 | 4.88 | +4.25D~-6.00D |
| THE ADD FROM +0.75D TO +3.50D.IN 0.25 DIOPTER STEPS | ||||||||
Bifocal Lens:
Bifocal eyeglass lenses contain two powers to help you see objects at all distances after you lose the ability to naturally change the focus of your eyes due to age.
About Our Company:
FAQ: 1. Are your company a manufacturer or a trade company?
We are a manufacturer with many years exporting experience. Our factory is located in Jiangsu province.
2. Can your products be customized?
We accept OEM &ODM orders. Actually most of our products are customized. We will try our best to fulfill your requirements about the material, the size, the printing.
3. How can I get sample from you?
Just send us your requirements, then we will send samples accordingly.
4. How many days will samples be finished? How about mass products?
Generally, we need 5-7 days to finish the sample production.As for the mass products, it depends on your order quantity.
5. How do you control lens quality?
Producing process is in vacuum dust-free shop, like prepare material, mixed material and take out .Four times quality checking during production process.
