157
Chapter 10 Specifications
For 8.5-mm type insertion tube
When the optical adapter is mounted on the insertion tube.
NOTE
*1Indicates the range within which the image can be viewed clearly.
*2The adapter can be inserted into a
φ 8.5 mm hole when it is mounted on the insertion tube.
*3Indicates the length of the rigid portion at the insertion tube’s distal end when mounted.
AT80D/
FF-IV88
AT120D/
NF-IV88
AT120D/
FF-IV88
AT120S/
NF-IV88
AT120S/
FF-IV88
Product
abbreviation
80DF V88 120DN V88 120DF V88 120SN V88 120SF V88
Character color Green Red Green Red Green
Opt
ical
sys
tem
Field of
view
80° 120° 120° 120° 120°
Direction
of view
Forward Forward Forward Side Side
Depth of
field *1
35 to ∞ mm 4 to 190 mm 25 to ∞ mm 1 to 25 mm 5 to ∞ mm
Dis
tal
end
Outer
diameter
*2
φ 8.5mm φ 8.5mm φ 8.5mm φ 8.5mm φ 8.5mm
Rigid
distal
end
length *3
22.9 mm 22.9 mm 22.9 mm 29.5 mm 29.5 mm
AT60D/
60D-IV88
AT60S/
60S-IV88
Product
abbreviation
60/60D V88 60/60S V88
Character color Blue Blue
Opt
ical
sys
tem
Field of
view
60°/60° 60°/60°
Direction
of view
Forward/
forward
Side/side
Depth of
field *1
5 to ∞ mm 4 to ∞ mm
Dis
tal
end
Outer
diameter
*2
φ 8.5mm φ 8.5mm
Rigid
distal
end
length *3
28.9 mm 36.5 mm
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