Specifications
17
High resolution and long working distance of the objective lens are important factors promoting ease of operation when a microscope is
used for inspection, observation or measurement. To obtain a clear image across the view field, apochromat specifications where chromatic
aberration is compensated (compensation of red, blue, and yellow wavelengths) over a wide range of visible light are important, as are plan
specifications where image surface warp, point aberration and other elements are compensated. FS objective lenses are high performance
objective lenses combining these factors. This series has expanded the application range of microscopes and significantly improved ease of
operation. M Plan Apo Series are lenses for BF observation using visible light. BD Plan Apo Series can be used for BF and DF observation.
SL (Super Long) specifications are useful when a longer working distance is required. G Plan Apo Series are lenses that enable observation
through glass. Glass thickness is compensated for 3.5mm (2 to 5mm custom designs are available).
Model No. Order No.
Magnification
N.A.
Working Distance
(mm)
Depth of
Focus ± (µm)
M Plan Apo 1X 378-800-3 1X 0.025 11.0 440
M Plan Apo 2X 378-801-3 2X 0.055 34.0 91
M Plan Apo 5X 378-802-3 5X 0.140 34.0 14
M Plan Apo 10X 378-803-3 10X 0.280 33.5 3.5
M Plan Apo 20X 378-804-2 20X 0.420 20.0 1.6
M Plan Apo 50X 378-805-3 50X 0.550 136.0 0.9
M Plan Apo 100X 378-806-3 100X 0.700 6.0 0.6
M Plan Apo SL 20X 378-810-3 20X 0.280 30.5 3.5
M Plan Apo SL 50X 378-811-3 50X 0.420 20.5 1.6
M Plan Apo SL 80X 378-812-3 80X 0.550 15.0 1.1
M Plan Apo SL 100X
378-813-3 100X 0.700 13.0 0.9
M Plan Apo SL 200X
378-816-3 200X 0.620 13.0 0.7
M Plan Apo HR 50X
378-814-4 50X 0.750 5.2 0.48
M Plan Apo HR 100X
378-815-4 100X 0.900 1.3 0.34
G Plan Apo 20X (t3.5)
378-847 20X 0.280
Air conversion 29.42
3.5
G Plan Apo 50X (t3.5)
378-848-3 50X 0.500
Air conversion 13.89
1.1
Lens set B1 378-911 Set of M Plan Apo 10X, 20X, 50X, and 100X
Lens set B2 378-912 Set of M Plan Apo 2X, 5X, 10X, and SL20X
Lens set B3 378-913 Set of M Plan Apo 5X, 10X, 20X, and 50X
FS objective lens
conversion adapter
378-026-1
Used when setting the Bright-Field BF lens onto the BF/DF
BD revolving nosepiece.
ML Objective Lenses
Model No. Order No. Magnification N.A.
Working
Distance (mm)
Depth of
Focus ± (µm)
ML 1X 375-036-1 1X 0.03 61 306
ML 3X 375-037-1 3X 0.09 77 34
ML 5
X 375-034-1 5X 0.13 61 23
ML 10
X 375-039 10X 0.21 51 6.2
ML 20
X 375-051 20X 0.42 20 1.6
ML 50
X 375-052 50X 0.55 13 0.9
ML 100
X 375-053 100X 0.70 6 0.6
Model No. Order No.
Magnification
N.A.
Working
Distance (mm)
Depth of
Focus ± (µm)
BD Plan Apo 2X 378-831-5 2X 0.055 34.0 91
BD Plan Apo 5
X 378-832-5 5X 0.140 34.0 14
BD Plan Apo 10X 378-833-5 10X 0.280 34.0 3.5
BD Plan Apo 20
X 378-834-4 20X 0.420 20.0 1.6
BD Plan Apo 50X 378-835-5 50X 0.550 13.0 0.9
BD Plan Apo 100
X 378-836-5 100X 0.700 6.0 0.6
BD Plan Apo SL 20
X 378-840-5 20X 0.280 30.5 3.5
BD Plan Apo SL 50
X 378-841-5 50X 0.420 20.0 1.6
BD Plan Apo SL 80X 378-842-5 80X 0.500 13.0 1.1
BD Plan Apo SL 100X
378-843-5 100X 0.550 13.0 0.9
BD Plan Apo HR 50X 378-845 50X 0.750 5.2 0.48
BD Plan Apo HR 100X
378-846 100X 0.900 1.3 0.34
Lens set
D1 378-931 Set of BD Plan Apo 10X, 20X, 50X, and 100X
Lens set
D2 378-932 Set of BD Plan Apo 2X, 5X, 10X, and SL20X
Lens set D3 378-933 Set of BD Plan Apo 5X, 10X, 20X, and 50X
Limited correction optical system...for MF B
FS Objective Lenses
Unlimited correction optical system...for MF-U B
For Bright-Field (BF) observation and measurement
For BF/DF (BD) observation and measurement