Ophthalmology Instruments Optometry Equipment Practical Optical Conveniently Compact Focimeter Hand Manual Lensmeter GJD-1 Economical basic portable lensometer The minimum measurement grid: 0.125D This portable lensometer is external reading type The prism compensation is optional. It’s easy to operate, convenient in use and full in function. Eyepiece A spiral focusing eyepiece, which focusing range is ± 5D. Easy to adjust for all operators. Prism Compensation (optional) It is used to compensate the measuring arrange of prism. The prism measurement range is increased from 0cm/m ~ 5cm/m to 0cm/m ~ 20cm/mm. Marking Pens The unit has 3 ink feeding marking pens, connected in line. The pen in the middle is used to set lens center and the connected line of marking points made by 3 pens are used to demarcate angle of astigmatism axis and base angle of prism lens. When operator need to mark on the surface of the lens, turn and push marking lever, then mark ink points on the lens quickly. Sphere power: -25.00D~ 25.00D 0D to ±5D, 0.125D/step ±5D to ±25D, 0.25D/step Axis range: 0~180° step 1° Prism power range: Standard Type0~5Δ, Step0.5Δ Type 0~20Δ, Step1Δ (prism compensation) Prism base angle: 0 to 180 degree, minimum scale value 1 degree 180 degree to 360 degree Minimum scale value 5 degree Eyepiece adjustable range: -5.00D to 5.00D Objective Lens diameter: Φ16MM to Φ80MM Size: 280(W) × 150(D) × 450(H) mm Weight: 4.9KGS Power supply: Input AC 100-240V, 50/60Hz; Output DC 6V 2A, 12W Other: DC Power supply is available