When accessories, including the photography unit, are fitted to the main body, the vertical
counter-balance movement may need to be adjusted. To correct this, auxiliary springs must
be fitted.
Each auxiliary spring consists of 2 identical springs.
Do not use different springs in a set.
Major Combinations of Accessories and Necessary Auxiliary Springs
Accessories
Auxiliary Spring type
Tonometer
is not fitted
Tonometer
is fitted
TV relay lens TL-55 + SONY DXC-33 (DXC-390)
–––
Standard
auxiliary
spring
TV attachment TL-56 +
Nikon Microsystem (Coolpix + Adapter lens)
Digital camera unit DC-1
TV relay lens TL-54 + JVC KY-F70
Standard
auxiliary
spring
Standard
auxiliary
spring
Electronic flash device FD-21 + Digital camera unit DC-1
Electronic flash device FD-21 (w/TV relay lens TL-55) +
SONY DXC-390
Beam splitter + Observation tube Auxiliary
spring
SO-AS1
Still camera attachment SR-53 + Nikon mount + Fuji S2 Pro
Beam splitter + TV relay lens (1/2C) + JVC KY-F70
Auxiliary
spring
SO-AS2
Electronic flash device FD-21 + beam splitter + TV relay lens
TL-53 + SONY DXC-390
Electronic flash device FD-21 (w/TV relay lens TL-54) +
JVC KY-F70
Electronic flash device FD-21
(w/still camera attachment SR-53) + Fuji Finepix S2 Pro
Auxiliary
spring
SO-AS1
Auxiliary
spring
SO-AS3
Electronic flash device FD-21 + beam splitter +
TV relay lens (1/2C) + JVC KY-F70
Electronic flash device FD-21
(w/still camera attachment SR-52) + Nikon D1 (X)
Auxiliary
spring
SO-AS2
Auxiliary
spring
SO-AS3
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