6x24 pinhole?

Boy that is a nice piece of work.

Trying to understand why the film is curved convex like that when I was thinking it should be concave, but I will study up on that.

Great stuff !
 
Roger Hicks said:
Dear Ezzie,

Why not just crop from an 8x10?

(Sorry, couldn't resist).

Cheers,

R.
Click to expand...
:D

Technically that would of course be the far superior, and easier route. I however have a propensity for overcoming pointless challenges, that and this being far cheaper, from which I find a strange sense of satisfaction - may be a Scottish congenital trait. Total outlay less than £5 (I was gifted the case, so did not get to enjoy the wine however).
 
daveleo said:
Boy that is a nice piece of work.

Trying to understand why the film is curved convex like that when I was thinking it should be concave, but I will study up on that.

Great stuff !
Click to expand...

As seen by the pinhole the film is indeed concave. You may be mixing up front and rear halves.
 
Ezzie
Your results are excellent, I've seen some pinhole on Filmwasters forum. Keep it up!
By the way that camera looks great!
 
Ezzie said:
As seen by the pinhole the film is indeed concave. You may be mixing up front and rear halves.
Click to expand...

I see.
I misunderstood a sentence in your web page write-up . . .
"OK, the edges would need to be farther away from the pinhole than the centre. . . ."
 
Geez and I thought my "Frankencamera" was an acheivement!!!Your pointless undertakings are a source of inspiration. Great stuff. Peter
 
daveleo said:
I see.
I misunderstood a sentence in your web page write-up . . .
"OK, the edges would need to be farther away from the pinhole than the centre. . . ."
Click to expand...

Ah, I see. What I meant is that the curve is not entirely semi-circular, more a parabolic curve. So the edges are not equidistant to the pinhole, though still closer than the same point would have been with a flat film plane.


Moto-Uno said:
Geez and I thought my "Frankencamera" was an acheivement!!!Your pointless undertakings are a source of inspiration. Great stuff. Peter
Click to expand...

Thank you Peter. Some point in time I may make a pointless exercise of making an 8x10 ;)
 
A small diagram that may help in understanding the simple but effective spool holding and winding system. One to each end/side. So film can be wound both ways, tightened by counter-rotating etc.

Film+holder+and+winder.png
 

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