Conversion of a
Vintage Polaroid
Models • 95 • 150 • 110A/B • 900 • a100 • a250 • a350 • a450 • SX-70 • Holgaroid
Ready the Back
Take your packfilm back and place it onto the camera body. It doesn't fit. First, because the right side of the camera interferes with the packfilm latch. Second, because of the ridges running along the top and bottom of the camera's back.
Insert a film mask from an empty pack of film into your back, this will show you where you need to align the back to center the image. For this back, a miter cut is a must. Using your measurements, find the points to mark where to cut.
Typically this is about where the edge of the cameras window is on the back, to about 1/4"or 1/2" from the front hinge. Measure twice, cut once.
For this project, I wanted clean and straight, so luckily I found this bad boy. An industrial bandsaw that will do the cut cleanly and quickly. You can also use a Dremel or a hacksaw to do the cut.
With the cut now complete, the only thing left from placing the packfilm back flush are those darn ridges and rivets from earlier.
The ridges need to be cut off flush and at the same time the rivets need to be ground down. Cut the ridges off but leave some ridge on the left side.
I noticed that with this particular back, the opening for the film is wider than the actual film and mask. This left a gap when there is no film in the camera.
Afraid of light leaks, I used some Bondo to add to the right side.
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.






