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| | | | | Posted on July 18, 2011 |
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| | | SEIWA Long Working Distance Plan Apochromat objectives for visible range.
Brightfield long working distance objective lens come with RMS (20.2 mm x 36TPI) mounting thread. On request we will supply an adapter free of charge to make the objective compatible with Mitutoyo style nosepieces using 26 mm x 36 TPI threading, see image below.  We use this adapter since several years on a range of NIR objectives.
Please contact us with questions.
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| Magnification | 2.5X | 
| Working distance | 32 mm | Focal length | 80 mm | Numerical aperture | 0.06 | Resolution | 5.6 µm | Depth of focus | 76.4 µm | Weight | 232 g |
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| Magnification | 5X | 
| Working distance | 35.1 mm | Focal length | 40 mm | Numerical aperture | 0.15 | Resolution | 2.1 µm | Depth of focus | 10.7 µm | Weight | 238 g |
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| Magnification | 10X | 
| Working distance | 36.9 mm | Focal length | 20.0 mm | Numerical aperture | 0.25 | Resolution | 1.5 µm | Depth of focus | 5.2 µm | Weight | 215 g |
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| Magnification | 20X | 
| Working distance | 22.2 mm | Focal length | 10.0 mm | Numerical aperture | 0.35 | Resolution | 1.0 µm | Depth of focus | 2.2 µm | Weight | 289 g |
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