User manual
c:JIo.w 
to. 
'J(d,e 
the 
?~ 
IJ~ 
Back 
01 
the 
No. 
3A 
Kodak
J 
Series 
II 
W
ITH 
the 
Twin 
Exposure 
Back, 
el
even 
27'2 
x 
3
74
-inch 
negatives 
can 
be 
made 
on 
Kodak 
122 
Film. 
The 
Twin 
Exposure 
Back 
must 
be 
fitted 
to 
your 
camera 
by  a competent camera repair shop. 
Insert 
the 
two 
flanges  of 
the 
metal 
mask 
under 
the 
bellows 
fr
ame 
as 
shown 
in 
the 
illustration
. 
Load 
your 
Kodak 
with 
t
he 
Kodak 
122 
Film 
in 
the 
usual 
way 
Close 
the 
back 
of 
the 
camera. 
Slip 
the 
metal 
cap 
over 
the 
view finder 
The 
small 
met
al 
mask 
must 
be slipped over 
the 
front 
frame 
of 
the 
metal 
frame 
direct 
view finder 
Do 
not 
attempt 
to 
make 
pictures 
with 
the 
Twin 
Exposure 
Back 
in 
place,  unless 
the 
finders 
have 
been 
provided 
with 
the 
finder 
masks 
supplied. 










