National Optical 420 Microscope Magnification

Eyepieces Objective / Auxiliary Lens
1x (Standard Objective)
0.5x (Optional Auxiliary Lens)
0.75x (Optional Auxiliary Lens)
1.5x (Optional Auxiliary Lens)
Working Distance 80mm
Working Distance 137mm
Working Distance 90mm
Working Distance 34mm
Zoom Range
Field Size
Zoom Range
Field Size
Zoom Range
Field Size
Zoom Range
Field Size
5x
5x - 20x
5x - 22mm
20x - 5.5mm
2.5x - 10x
2.5x - 44mm
10x - 11mm
3.75x - 15x
3.75x - 29.3mm
15x - 7.3mm
7.5x - 30x
7.5x - 14.7mm
30x - 3.7mm
10x
10x - 40x
10x - 20mm
40x - 5mm
5x - 20x
5x - 40mm
20x - 10mm
7.5x - 30x
7.5x - 26.7mm
30x - 6.7mm
15x - 60x
15x - 13.3mm
60x - 3.3mm
15x
15x - 60x
15x - 13mm
60x - 3.25mm
7.5x - 30x
7.5x - 26mm
30x - 6.5mm
11.25x - 45x
11.25x - 17.3mm
45x - 4.3mm
22.5x - 90x
22.5x - 8.7mm
90x - 2.2mm
20x
20x - 80x
20x - 10mm
80x - 2.5mm
10x - 40x
10x - 20mm
40x - 5mm
15x - 60x
15x - 13.3mm
60x - 3.3mm
30x - 120x
30x - 6.7mm
120x - 1.7mm