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Chapter 10 Specifications
10.3 Optical adapter specifications
For insertion tube 4-mm type
When the optical adapter is mounted on the insertion tube.
NOTE
*1 Indicates the range within which the image can be viewed clearly.
*2 The adapter can be inserted into a
φ 4.0 mm hole when it is mounted on the insertion tube.
*3 Indicates the length of the rigid portion at the insertion tube’s distal end when mounted.
AT120D/
NF-IV84
AT120D/
FF-IV84
AT120S/
NF-IV84
AT120S/
FF-IV84
AT50D/
50D-IV84
AT50S/
50S-IV84
Product
abbreviation
120DN V84 120DF V84 120SN V84 120SF V84 50/50D V84 50/50S V84
Character color Red Green Red Green Blue Blue
Opt
ical
sys
tem
Field of
view
120° 120° 120° 120° 50°/50° 50°/50°
Direction
of view
Forward Forward Side Side Forward/
forward
Side/side
Depth of
field *1
4 to 190 mm
25 to ∞ mm
1 to 20 mm
6 to ∞ mm 5 to ∞ mm 4 to ∞ mm
Dis
tal
end
Outer
diameter
*2
φ 4.0 mm φ 4.0 mm φ 4.0 mm φ 4.0 mm φ 4.0 mm φ 4.0 mm
Rigid
distal
end
length *3
19.7 mm 19.6 mm 22.2 mm 22.2 mm 25.0 mm 28.8 mm