Conversion of a
Vintage Polaroid
Models • 95 • 150 • 110A/B • 900 • a100 • a250 • a350 • a450 • SX-70 • Holgaroid
Putting it All Together
With all the pieces in order, all the holes drilled and tapped properly, it is now time to make this 110A into a glorified 110B, sans the knob label of course.
First things first. Clean the glass elements of the finder. After decades of disuse, the pieces probably aren't too clear. Using some alcohol and a lens cloth worked for me.
I also dabbed a drop of hot glue to keep the pieces from sliding out.
Replace the bottom plate. Don't forget to also screw down the strap piece using one of the longer leftover screws. Place the mirror box and align with the mirror post and the extra hole drilled earlier. Hopefully you marked infinity on the spring arm of the mirror box.
With the focus cam arm, rotate (blue arrow) it until set. Do this with the camera closed so you can be sure to not be turning the post, just the arm. Replace the cam and mirror along with both springs, yellow. Set the cam where the notch that is cut from it aligns with the similar one on the arm below it, screw it tight. Align the mirror's arm with the line on the cam.
The last thing to do is connect the flash. Open the camera and fold it out as far as it would ever go. Now cut the flash wire accordingly, leaving enough to connect the wires. The plastic housing has little space to allow for the flash wires, so trim short, but not too short.
Once soldered, use hot glue to seal the connections. Because this make the connection a little thicker than the rest try to use the space behind the mirror, yellow arrow, to hide it. It will take quite a few attempts to close the housing and find all the places where you simply can not run the wires. When you have a path to run the wires, use hot glue to hold it flush.
Replace the 2 housing screws. Because of the missing flash screw, this side of the housing seems to want to stick up a bit. Not a huge deal, but I used some hot glue, blue arrows, to hold it down instead of the original idea of double-sided tape.
Hmmm, something seems to be missing from this camera.
Oh, that's right, the back door!
It needs to be cut to size and fitted with a means to keep it from flopping open.
If you get lost at anytime, you can always click the link at the bottom of the page to come back here.
The Steps
parts & labor
what's needed to get the job done
basics of function
overview of how to use the lens and shutter
the back, the strap, the lens
remove useless vintage roll-film parts; lens
the rangefinder
removing, taking apart
cutter-bar & inner parts
more useless vintage parts that have to go
ready the back
cutting; fitting the packfilm back; odds n ends
acquiring a 900 finder
removal & appropriation
fitting the finder & flash
measure, drill & fit
aesthetics
remove & re-leather; paint
adding the back & flash
screws, tape & wires
putting it all together
replace rangefinder, strap, flash & side door
reset infinity
setting the focus stop
completed
admire the work
Information …
The Models
These are the models I have personal experience with and are used within this site.






