แว่นขยายแบบคาดศีรษะมีไฟ led สําหรับส่องเครื่องประดับ

5 Replaceable/Interconvertible lens with different magnifications marked in the middle
LED light can be rotated about 60 degree and light source box with battery compartment is detachable
Adjustable head band ensures more comfortable and tight head wearing
Light source box can be used separately as lighting source after being dismantled
Widely used in mechanical processing electronic repair jewelry appraisal timepieces repair and miniature engraving etc
Specifications:
Single-plate lens magnifications: 1.0x 1.5x 2.0x 2.5x 3.5x
Bi-plate lens magnifications: 3.0x 4.0x 4.5x 5.0x 5.5x 6.0x
Magnifications are marked in the middle of lens
Table below denotes the distance proportion between magnifications and viewed objects:
　
Magnifications Distance to viewed objects
1.0x 300 ~ 350mm
1.5x 240 ~ 260mm
2.0x 215 ~ 235mm
2.5x 205 ~ 225mm
3.0x 160 ~ 180mm
3.5x 135 ~ 145mm
4.0x 125 ~ 135mm
4.5x 110 ~ 130mm
5.0x 100 ~ 120mm
5.5x 80 ~ 95mm
6.0x 60 ~ 85mm
LED: 2 Pieces
Lens: 5 Pieces
Battery: 3 * 1.5V AAA batteries (NOT included)
Head circumference: Adjustable
Lens material: High quality PC
Headpiece material: Environmental protection acrylic
Applications: Timepiece repair jewelry appraisal miniature engraving etc.
Color: Black + White
Size: 25.5*20.5cm/10.03*8.07
Quantity: 1pc