The first, and maybe the hardest part of modifying our Polaroid 95a camera is going to be stripping out all the rollers and unnecessary parts. We need to make as much room for our medium format Lego assembly as possible. I used a needle nose pliers, a drill to drill out the rivets, a hammer, and alot of elbow grease. Here is what your gutted Polaroid 95a looks like after you remove all the rollers:

With the hard part out of the way, you are ready to play with legos. To advance the film, you will need to drill a hole in the top of the camera to put your film advance knob through. My hole wasn't in exactly the right place so you can see where I used a dremmel to make a little more room on the right (this is looking at it from the top):

I used a larger gear to turn a smaller gear. This allows one turn of the knob to advance the film one frame. The downside is that it puts a little too much pressure on the gears and if I am not careful it will miss a gear.

The next step is to build the part that will hold the spool. Here is a closer look at my assembly with and without the spool:

There isn't a lego piece that will fit perfectly in a 120 spool so we will have to fabricate our own. A Dremmel and some sand paper should do the trick. Here is the before and after photo:

The left side of the camera is where the unexposed roll of film will sit. This side is less complex than the film advance side because all it has to do is hold the film. A size 8 lego fits almost perfectly here. Keep in mind that you want the spool to be exactly straight accross from the spool on the other side so it doesn't bind. It should look like this:

Now that we have a place for the spool on both sides, it is time to build a guide in the center. This keeps the film tight and prevents it from getting off the spool on the right. I used matte board and it looked like this after the film is loaded:

Now all you have to do is fill any holes and test it out. It is a good idea to waste a roll of 120 film so that you can test your advance knob and make sure everything lines up. If any piece is loose or not perfectly aligned it will cause problems. I had to tweak things quite a bit before it loaded and advanced properly.

You are now ready to take pictures. There is one other thing to keep in mind before you start shooting up film. Old Polaroid cameras had their own system of "light values." Rather than setting the shutter and aperture separately, the Polaroid 95a has 8 different settings (1-8). Don't ask me the reason for this setup, but I can show you this chart that shows what each setting actually is in terms of shutter speed and aperture:

The chart above uses information taken from www.rhwhirled.com which is a great resource if you want to learn more about the Polaroid 95a or many other older Polaroid cameras. Good luck with your modifications and drop me an email if you decide to undertake this hack.