1st pinhole experience - advice please?
The other day I ran across this in a store: http://www.hobbymasters.com/index.as...OD&ProdID=2676 for $15 I thought "why not?"
I used Plus-X and shot on a pretty sunny day yesterday.
How can I make them sharper? Is there any way to get them wider-angle?
Thanks in advance
Last edited by IloveTLRs; 08-15-2009 at 04:59 PM. Click to view previous post history.
There is an optimal effective focal length for each different diameter of pinhole. The optimal focal length will give best sharpness at the wavelength that you feed into the formula.
This site seems to have some info that may be of use...
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Wider would be to shorten the focal length by moving either the pinhole or the film towards the other. However this will increase your f number thus slightly reducing sharpness a wee bit. Perhaps imperceptibly.
"Wubba, wubba, wubba. Bing, bang, bong. Yuck, yuck, yuck and a fiddle-dee-dee." - The Yeti
Sharp is not really a pinhole characteristic, although I suspect you might be able to do a little better. The width, as Chris says, requires reducing the distance from pinhole to film. In your case, it looks as though the pinhole isn't quite centered left to right. There is hard vignetting on the left side, implying the pinhole is too far to the right. I have no idea what the construction of your camera is, maybe you can make some minor adjustments.
The Worlwide Pinhole Photography Day folks have a resource page with a lot of links that might yield something useful.
A few years back I had some problems with vignetting in a homemade body cap pinhole assembly. It turned out there was just too thick a stack of stuff clamped together for the diameter of some of the clearance holes. A careful scale diagram to sort it out, followed by a major rework, fixed the problem. Rev. 2
I understand that a soft image is a pinhole characteristic, but that some aficionados sharpen their images digitally in PP.
Originally Posted by IloveTLRs
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Can you tell me what the focal length of the camera is? The distance from the pinhole to the film? I may have a pinhole that I can send you and it will help with the sharpness of the image. Also check
There you will see the different possibilties of pinhole cameras. There is no reason, unless it is what you want , for the image to be foggy or soft. With the right pinhole and no photoshop the images can be great and very sharp. The problem you are having is that you are being asked to make a pinhole with a needle in the foil given. You can not be expected to make the correct size pinhole for the focal length of the camera. Therefore the image will never be as sharp as it can be.
PP? That must mean Piss Poor, because that's what it looks like most of the time when you take a soft image and try to make it sharp with a computer.
Originally Posted by Galah
I think the problem is that the camera probably has cheap foil and probably not the best instructions for how to make the hole. (Whaddayawant for 15 bucks? Heh heh.) It could be improved by installing a nicely-drilled pinhole closer to the "optimum" diameter, and by making sure that the camera is absolutely steady during exposure.
Last edited by 2F/2F; 04-01-2009 at 02:58 AM. Click to view previous post history.
"Truth and love are my law and worship. Form and conscience are my manifestation and guide. Nature and peace are my shelter and companions. Order is my attitude. Beauty and perfection are my attack."
- Rob Tyner (1944 - 1991)
I agree with 2F/2F. Revel in it, your photographs are wonderfully dreamy.
However, for tongue-in-cheek completeness, I should mention there is one surefire way to improve the sharpness of your toy camera, and that is to put a focusing lens in front of it.
You can get sharper shots with a better hole (perfectly circular, without burrs etc) placed at the correct distance from the film plane, as 2F/2F said, but pinhole shots will never be perfectly sharp.
I agree with David William White - enjoy the dreaminess. Maybe make some lith prints to exploit it, or cyanotypes. Use the vignetting pictorially in your composition. Sepia toned prints with the vignetting would have a very old-fashioned look, so make people think by taking modern subjects (as you have done) and giving them that kind of treatment.
You can have all kinds of fun with it.
I made another pinhole today and will try the camera out again.