JoLo Lens-board Mark III User manual

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Mounting Instructions JoLo
Lens-board Mark III for the Kodak Aero Lens
Thank you for purchasing the JoLo lens board to create your very exclusive
Personal Speed Aero Combo.
Please read this carefully, before even thinking of starting right away!
On the lens board you’ll find the Allen hex key taped on the back of
the lens board.
First of all tear off the tape and use the Allen key to turn the hex
screw on top of the JoLo lens board until it does no more extrude
inside the thread.
1) Cover the front and rear lens while working on the lens.
2) Remove or cover the ground glass of your camera to avoid breaking the glass.
3) Clean your Aero lens thread thoroughly with a brush and if necessary some lighter gasoline.
Make sure nothing of the liquid can enter the inner lens.
4) These objectives are more than 50 years old. Therefore, you may check the thread carefully
for imperfections. If you do find imperfections use a sharp knife or even better a special file
to repair the thread. (fig 2) Always use a magnifier!
5) Turn the fixing screw (fig 7) a bit anti clockwise so that it does not protrude on the inner
thread of the lens board. (fig 1)
fig 1 fig 2
6) Try the lens board if it runs easily on the lens thread (fig1)
7) If it does not, please turn it back again and try to find the cause of the problem. Do not
force the lens board by turning it too tight. The lens board might not loosen again without
seriously damaging the thread and thus making the lens unusable.
8) The lens board should be positioned so that its rear edge just covers the lens threads,
without allowing any threads to protrude backwards. (Fig 8)
9) Now search for the right position so that the marking point of the diaphragm points up and
lies in a straight line with the fixing screw. Fig. 5
10) Fix this position by turning the hex screw tight with a hex wrench. Fig.6

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11) Now you may mount the lens on the camera by placing the lens board with lens in the open
standard. If it does not fit skip to 13
12) Attention! The board is not a full square, so you’ll have to make sure that the
JoLo inscription is on top left of the camera standard (fig.4) Close the slide locks.
13)You may find out that the 7 inch Aero lens does not fit into the black square
light-trap of the front standard. This is normal. The rear of the lens is a tiny little
bigger than the light-trap. I added a metal screw and a long barrel nut in your
lens board package to solve the problem very easily. Follow the instructions
below to mount your lens successfully.
a) Remove the paddle of the release lever.
You won’t need it anyway when using the Aero lens.
b) Remove the Graflok back with the ground glass to prevent damaging the
ground glass while working on the light-trap.
c) Hold the screw with the long barrel nut in the centre of the light trap and
screw the barrel nut outwards until it jams in between the square light trap.
d) Turn the nut a few times using a wrench.
e) Repeat 3 and 4 in the vertical way.
f) Check if the lens fits in the square light trap.
If you intend to focus exclusively on the
ground glass, you may skip to 23)

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13) Loosen the four screws of the infinity stops and slide them a few inches forwards.
14) Move the track all the way back into the camera body by turning the focusing knobs on front
of the bed. The distance scale should be positioned on infinity. Lock this position by turning
the track lock on the right side of the bed near the focusing knob.
15) Set the Focal Plane shutter on position “O”. You will be able to see an image on the ground
glass.
16) Swing the front standard lock out strait ( fig.3) then pull out the standard with lens while
sighting the ground glass. Now try to find the best possible crisp image on the ground glass
from a far away subject, such as a church tower. Use a magnifier. Having found the best
possible image, turn the standard lock to the left or to the right to hold the standard locked
on this position.
Fig 3 fig 4
17) Reset the infinity stops at this position. Hinged stops raised against the front standard. Fasten
the front screws of the infinity stops. Swing standard lock straight and slide the standard
back. Fasten the rear screws of the infinity stops. Slide the standard back to the infinity
stops. This location of the infinity stops has become the new reference point for the Aero
lens.
18) Check again if the image on the ground glass on a far away object is crispy sharp.
Start the Kalart Rangefinder calibration procedure.
Please be aware that the Rangefinder adjustment is limited. This limitation is about as
close as 6 to 10 feet depending on your lens.
The calibration instructions can be found on my web site Calibration
22) The camera cannot be closed with the Aero lens mounted. Therefore,
you will have to remove it.
23) For those who do not want to adjust the Kalart rangefinder and want to use
exclusively the ground glass to focus, it would be a great advantage to replace the
infinity stops on the right place for use with the 7 inch Aero. To do so move the
track all the way back into the camera body using the focusing knobs. Now
loosen the screws of the infinity stops and find the new infinity location for the

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standard by sliding the standard with the lens along the track while watching the
ground glass for a sharp image on a subject a mile away. Having found that
location, turn the lock to the right to secure the front standard firmly. Now slide
the infinity stops back directly against the standard in the new found position for
the 7-inch lens. Use the screws to tighten the infinity stops to the track.
24) To close the camera: Unlock the track lock and if necessary move the track back
into the camera house by turning the focusing knobs.
25) Next, unlock the front standard by swinging the front standard lock forward.
Move the entire front standard as far as possible into the camera body and lock it
in place.
26) Always check to be sure that the sliding track is moved all of the way back into
the camera body before closing the camera to avoid breaking the track guides.
fig. 5 fig. 6
fig. 7 fig. 8
Good luck!
Jo Lommen.