Basic Info.
Model NO.
Semi-Finished Cr39 1.499 SF Round 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
Keywords
Semi-Finished Cr39 1.499 Sf Round Top Lens
Trademark
Seesen
Origin
Danyang, China
Product Description
SEMI-FINISHED 1.499 ROUND-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 | ||||||||
What is the RT-28?
Round top bifocals are further described by the width of the near segment, measured in millimeters (mm). The most popular RT bifocal is the RT-28, a round top bifocal with a near seg that is 28 mm wide.
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.