A non-flat film plane won't cause unsharpness in a pinhole camera. It'll cause distortion. Much more likely that your NOON has an less optimal pinhole size than your Holga PC. Presuming NOON gave you the effecive aperture ratio (f stop), and Lomography did the same, you ought to be able to compare the holes you actually have against an optimum calculation for he projection distance of each camera.
A millimeter or two from optimum won't make any visible difference in the image.
Nice, I love that one & the pillar above, it has that perfect holga fade around the edges. Where did you get the Pan ? I've been on the lookout for one for a while, they never seem to pop up on EBay. Not too happy with the WPC, I have a slightly tighter pinhole (0.25mm instead of the current 0.3mm) ordered to see if it'll make a difference.
OK, maybe I'm mis-understanding, but I thought that there was an optimal distance for the film to be away from the pinhole based on the pinhole size. If the film is curled, and therefor potentially not in the proper plane/distance in some parts, wouldn't that affect the "sharpness" of the image?
I haven't ran the calcs yet and measured to see if the distance is correct on the NOON. The NOON is f/214 and the Holga is f/192.
Jeremy
Curved film plane in pinhole camera actually improves sharpness corner to corner, but introduces curvature to most horizotal (and to lesser extent diagonal) lines, except one horizontal that is dead center on the hole.
Pinhole size does depend on film to hole distance but science is not that exact, so the only way to get best combination of the two for best sharpness is by experimentation. Since no pinholes are exactly the same, even in production, each is going to need some fiddling. At the end of the day there is a point when return on time invested is no longer worth it and several other factors play into pinhole projection quality on any given day anyways. Sticking to well established formulas to get the right combination is typically sufficient.
Whichever way the curve goes, it affects those lines (verticals in your case). Curved film plane visibly improves edge sharpness in panoramic formats where distance from center to side is quite large, the smaller the format the less of an impact it has.Thanks for that. I understand the curved film plane thing - one of the pinhole cameras, the Reality So Subtle, I was looking originally before the NOON was a 6x12 that had a curved plane.
Unfortunately the NOON pinhole I have the film is curved top to bottom, not side to side, and I don't think even that is uniform. It's cupped and I think the wooden back of the camera puts some pressure on it when its shut but not certain how much. It probably doesn't affect anything - In the end it may just be a bad pinhole or not optimized for its size. Either way I don't see me using it much anymore since the Holga 120 PC seems to be fairly good and I think the Holga 120 Pan will scratch my itch for low-fi 6x12 images.
Thanks!
Jeremy
How are you guys getting such great pictures from freaking Holgas? Is it the scanning? I've only ever seen blurry, "artistic", dreamy, crappy photos from a Holga.
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