Friday, December 4, 2009

3x4 instant film back (cont.)

(2013/11/17) By keep improving Byron design, now 3x4 instant film holders don't need any modification for Byron, thus what this post discussed are for record only, please refer here.




Blocked by left side teeth and blocking plate, I said that 3x4 Polaroid instant film hold could be used on Byron, but had to use 10 films every time, in my last blog.

Well, not true anymore.

That's ridiculous to force user to shoot 10 instant film every time.

So I tried to solve this problem. One guy in other forum asked about the similar question, his camera blocking the dark slide from inserting back, I suggested him to cut out the part that blocks, and then think maybe I can solve my problem in similar way.

But not to cut out something, thus, to replace something.

First, I have to mask the hole exposed by lathing last time I modified film holder. The work is simple, to glue a thin layer of black plastic on it, the result is satisfied, you wouldn't notice it modified already.
Secondary, to solve that dark slide can not insert back problem.
Use the same thin layer of plastic, made a dark slide same as original.
Since the slide is not so stiff, plastic dark slide now can be pulled out or inserted back anytime during the shooting.
Need a little bit of practice, then you can figure out the way to handle this flexible plastic dark slide.

The final problem, lock/unlock the holder cover, that will take me two days, to be continued.

(06/12 Add)
There are two design versions for holder cover lock. One by me, one by my little boy George, he is 7.

After two days tests and designs, I managed to utilize the holes on the cover, to make a rather "high tec" lock.


Replacing the lock handler with a steel rod through the holes, and fixed by e-rings, now the rod extruding a little bit, as two handles.
Then implant a spring steel loop each side, them lock the cover.
Looks nice, and feel good to use, I am proud about it, took me two days.

Then my kid George came asking me what I am doing, I explained to him and operated to show off, he listened and looked at me, in a weired expression :"that is a cover isn't it? just for lock and unlock, right?","yes." I replied.


Then he went away and back within ten seconds, showed me his solution.
A rubber band! I had to admit it, that is the best solution.

And took George 10 seconds.
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