Mitutoyo Finescope 70 (FS70) Microscope camera C-mount adapters.
SKU Number | Model Number | Focal length (mm) | Magnification (tube lens) | Image field (mm) | Entrance Pupil (mm) | Dimensions (mm) | Abberation Corr. Range (nm) | Mass (g) |
MTYO 970208 | MT-1 | 200 | 1X | ø30 | ø24.0 | ø40x32.5 | 436 - 656 | 43 |
MTYO 970209 | MT-2 | 400 | 2X | ø30 | ø18.0 | ø40x32.0 | 436 - 656 | 42 |
MTYO 378-010 | MT-40 | 200 | 1X | ø24 | ø11.2 | ø34x27.5 | 436 - 656 | 45 |
MTYO 378-008 | MT-L | 200 | 1X | ø24 | ø22.0 | ø35x32.0 | 355 - 1064 | 30 |
MTYO 378-009 | MT-L4 | 200 | 1X | ø24 | ø23.0 | ø35x30.6 | 266 - 620 | 30 |
Example:
Calculate the distance (L) to cover an image field of ø24:
- SKU MTYO 378-803-3, Model M Plan Apo 10X (f=20mm, N.A.=0.28)
- SKU MTYO 970208, Model MT-1 tube lens (ø2=24mm, f2=200mm)
Diameter
ø1 = 2 x f x N.A. (mm)
ø1=2x20x0.28 =11.2 (mm)
Length
ℓ = (ø2– ø1) x f2 /ø2 (mm)
L=(24−11.2) x 200/24 =106.6 (mm)
ø1: Objective exit pupil diameter (mm)
ø2: Effective diameter of tube lens (mm)
f2: Focal length of tube lens
ø: Image field diameter
Therefore a distance (L) up to 106mm can cover an image field of ø24 without shading.
A distance (L) smaller than the specification does not affect optical performance.
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