Color: Black, Brown
Size: 49-20-140 Measurements: A Box: 49 B Box 39 ED 52 DBL 20 Temple: 140
- A Box is the horizontal measument of the lens opening.
- B Box is the vertical measurement of the lens opening.
- ED is the longest measurement of the lens opening, usually on a diagonal from upper nasal to lower temporal.
- DBL is the horizontal measurement across the bridge (over the nose) of the frame.
- Temple is the length of the temple (arm, goes over your ears) as measured from the hinge break
This package includes our Signature Accessory kit:
- Hard shell case
- Microfiber cleaning cloth
- Elastic sport strap
The AGW®-250 lens was developed to answer requests for even better infrared radiation protection while also reducing the light level perceived by the eye.
It consists of a base lens of our exclusive Blue Didymium™ with a thin layer of either shade 2, 4, 5, 6 or 8 Green Welding (full coverage) laminated to the base lens. This is very desirable when working with high pressure torches and glass requiring very high temperatures.
Suggested uses are: where there is a need for attenuation of bright illumination, such as that generated when working Pyrex®, quartz, Vicor®, platinum jewelry work, and any operation where long periods of time are spent gazing into a high temperature furnace or fire pit.
Quartz workers must use a minimum Shade 8!
The AGW-250 filter is available in non-prescription (plano power), readers, single vision, and standard flat-top D28 bifocal prescription form.
Thickness Advisory: This filter is thicker than normal lenses. In non-prescription form, it is approximately 4 mm thick. Single vision prescription adds at least 1 mm, bifocal prescription adds at least 2 mm.
Protected under United States Patent Number 6,612,697.
Specifications (Shade 3):
Maximum Visible Light Transmission: 12.4 %
Average (400 to 750 nm) Visible Light Transmission: 5.6 %
Average (751 to 3000 nm) IR Transmission: 3.4 %
ANSI Welding Shade Equivalent: 3.0 approximate
NOTE: Shade 2 and 3 filters are *NOT* designed for advanced techniques such as fuming, or with intensive flare colors without additional filtration.
Specifications (Shade 4):
Maximum Visible Light Transmission: 11.2 %
Average (400 to 750 nm) Visible Light Transmission: 4.9 %
Average (751 to 3000 nm) IR Transmission: 4.0 %
ANSI Welding Shade Equivalent: 3.5 approximate
Specifications (Shade 5):
Maximum Visible Light Transmission: 5.7 %
Average (400 to 750 nm) Visible Light Transmission: 2.1 %
Average (751 to 3000 nm) IR Transmission: 1.5 %
ANSI Welding Shade Equivalent: 4.5 approximate
Blue Didymium™ is our exclusive new soft glass torch working filter. It is an updated recipe of the old Schott ACE glass. This filter is not sourced from Schott, but from one of their competitors. We are also pleased to announce that the Blue Didymium™ is available in a 71 mm diameter lens and accordingly, all of our previous restrictions on frame sizing have been removed.
A side benefit of this filter is the apparent improvement in judging the color temperature of the glass while working it. The observed color is very comfortable when viewing glowing heat sources for long periods of time.
Suggested uses are: lamp working of soft glass beads and small sculptures. Not recommended for work on very high temperature glasses for long periods of time.
Blue Didymium™ prescription lenses are available supplied with Aura's exclusive AuraLite™ process. A 2.7 mm thick wafer of Blue Didymium™ is laminated over a thinly ground glass crown glass lens. This lamination process also makes for a safer lens.
Lenses are available in plano (non-prescription), readers, single vision, D-28 bifocals, and 7x28 trifocals. Progressive (invisible) bifocals are not available with this filter.
Thickness Advisory: This filter is thicker than normal lenses. In non-prescription form, it is approximately 3 mm thick. Single vision prescription adds at least 1 mm, bifocal prescription adds at least 2 mm.
NOTE: This lens is designed for SOFT GLASS ONLY. DO NOT USE FOR OR WITH BOROSILICATE GLASS TYPE WITHOUT ADDITIONAL FILTER PROTECTION!!
BE SURE TO SELECT A FRAME WHEN YOU ARE DONE!
Maximum Visible Light Transmission: 86.2 %
Average (400 to 750 nm) Visible Light Transmission: 44 %
Average (751 to 3000 nm) IR Transmission: 59.0 %