Pinhole problems

Thumb · Feb 7, 2012

Hi,

I have developed film from my pinhole today. Can you tell me what's wrong?
http://monet.rajce.idnes.cz/Pinhole

edp · Feb 7, 2012

Some light leaks, some camera movement. Nothing wrong with this one (nothing that's visible at this size, anyway). http://monet.rajce.idnes.cz/Pinhole#29080002.jpg

Pictures look rather grainy. Is it 35mm? What film?

gtyler5 · Feb 7, 2012

Looks like pinhole images to me. What kind of results are you looking to get? Is your camera home made?

Thumb · Feb 7, 2012

So, some light leaks..yeah..it's possible
Yes, it's 35mm. It's Fomapan 100 (maybe 200) And do you think, that the distance between ,,lens'' and film is ok?

Thumb · Feb 7, 2012

Yes, it is, but I would like to reach something like this.
http://www.pinhole.cz/cz/gallery/
or
http://www.pinhole.cz/cz/pinholecameras/l_053.html

himself · Feb 7, 2012

Thumb said:
And do you think, that the distance between ,,lens'' and film is ok?

could be, how did you calculate it?
and for all your pinhole needs try MrPinhole

Thumb · Feb 7, 2012

I did it by Pinhole designer

edp · Feb 7, 2012

Those ones you linked to I would say are i) wider than yours (shorter distance between pinhole and film), ii) at least medium format, and iii) the black and white ones use a curved film plane.

himself · Feb 7, 2012

Thumb said:
I did it by Pinhole designer

did you machine the pinhole yourself?
looking at the links you posted they were probably super high quality holes, not using a pin by hand or something

edp · Feb 7, 2012

I completely recommend Fuji Acros 100 for pinhole: excellent reciprocity characteristics, and very little grain.

DWThomas · Feb 7, 2012

Based on only moderate light fall-off near the ends, I'd say your pinhole to film spacing is probably OK. Several of the images appear to show camera motion during exposure; a solid way to anchor it would be good. I actually have a tripod socket (a 1/4-20 threaded "T-nut") in my most recent one. As others have said, there appears to be some light leaks too.

I didn't dig through that other site enough to learn what film format the guy was using. Generally from what I have seen, the larger the film format, the sharper the image. But sharpness can also be very much affected by the quality of the pinhole, as well as the size. A perfectly round hole with a knife edge in very thin material produces the best result.

You certainly got some recognizable results, it was a good attempt.

DaveT

Thumb · Feb 7, 2012

Thanks..I don't want that curved ones. I want something like this: http://www.pinhole.cz/cz/pinholecameras/l_053.html
This photo is sharp and and has from white to black scale..

Thumb · Feb 7, 2012

Thanks very much

himself · Feb 7, 2012

DWThomas said:
Based on only moderate light fall-off near the ends, I'd say your pinhole to film spacing is probably OK. Several of the images appear to show camera motion during exposure; a solid way to anchor it would be good. I actually have a tripod socket (a 1/4-20 threaded "T-nut") in my most recent one. As others have said, there appears to be some light leaks too.

I didn't dig through that other site enough to learn what film format the guy was using. Generally from what I have seen, the larger the film format, the sharper the image. But sharpness can also be very much affected by the quality of the pinhole, as well as the size. A perfectly round hole with a knife edge in very thin material produces the best result.

You certainly got some recognizable results, it was a good attempt.

DaveT

not so sure about the film size, 35 has always worked fine for me.
but you're right about the rest, pinhole quality is probably most important.

Thumb · Feb 7, 2012

yes i did it by myself.

himself · Feb 7, 2012

what did you make it in and with?

Thumb · Feb 7, 2012

DWThomas said:
Based on only moderate light fall-off near the ends, I'd say your pinhole to film spacing is probably OK. Several of the images appear to show camera motion during exposure; a solid way to anchor it would be good. I actually have a tripod socket (a 1/4-20 threaded "T-nut") in my most recent one. As others have said, there appears to be some light leaks too.

I didn't dig through that other site enough to learn what film format the guy was using. Generally from what I have seen, the larger the film format, the sharper the image. But sharpness can also be very much affected by the quality of the pinhole, as well as the size. A perfectly round hole with a knife edge in very thin material produces the best result.

You certainly got some recognizable results, it was a good attempt.

DaveT

Thank you so much. It's useful for me. I'm beginner

edp · Feb 7, 2012

How big did Pinhole Designer tell you to make the hole? How did you make it? You can get a good idea of how big, and how round, the hole is by using a scanner.

Don't ban me for saying sc*nner.

cliveh · Feb 7, 2012

This looks to me like camera movement.

DWThomas · Feb 7, 2012

I just realized -- the examples you linked to are taken by the creator of Pinhole Designer, he has a head start on some of the rest of us!

You can survey a few of my pinhole efforts on my PBase gallery site. The film images I took for WPPD 2011 (with a completely homemade 4x5) suggest it's my best homemade pinhole yet. My attempts with paper negatives indicate a little more tweaking, especially an adjustment of the pre-flashing, might be useful.

So far, a body cap adapter for my Bronica, getting 6x6 cm format exposures, is the smallest format I've tried, so I don't have much feel for what 35 mm might do. I second the recommendation for Acros, as there are enough complications without adding large reciprocity failures.

edp · Feb 7, 2012

My best results are all 6x9cm, using a Zero Image camera which has a pinhole somewhat smaller than the recommended values calculated by pinhole designer. That makes the images a bit sharper, and the reduced enlargement from the film to the viewing size also helps it to appear sharper. Although, sharpness is not what pinholery is about. http://www.flickr.com/photos/9295972@N02/sets/72157605483356905/

Thumb · Feb 7, 2012

edp said:
How big did Pinhole Designer tell you to make the hole? How did you make it? You can get a good idea of how big, and how round, the hole is by using a scanner.

Don't ban me for saying sc*nner.

At first, I make a hole by needle to the piece of thin alluminium. I measure it by scanner. It was 0.25mm .Pinhole designer said to me, that distance between hole and film should be 31,478mm.
The whole Pinhole was made from cardboard and from black tape.
http://monet.rajce.idnes.cz/Pinhole#DSC00567.jpg

edp · Feb 7, 2012

Nice camera.

I would try to make another hole, this time a bit smaller, say 0.18 or 0.20mm. I've had some success using small pieces of beer can, and using the method where you first press a small dent into the metal, then sand it away from the other side using very fine sandpaper or a knife sharpening stone. It's easier to control the final size that way than it is by simply pushing the needle through the foil.

cliveh · Feb 7, 2012

edp said:
My best results are all 6x9cm, using a Zero Image camera which has a pinhole somewhat smaller than the recommended values calculated by pinhole designer. That makes the images a bit sharper, and the reduced enlargement from the film to the viewing size also helps it to appear sharper. Although, sharpness is not what pinholery is about. http://www.flickr.com/photos/9295972@N02/sets/72157605483356905/

Try this for size - Dead Link Removed

Thumb · Feb 7, 2012

edp said:
Nice camera.

I would try to make another hole, this time a bit smaller, say 0.18 or 0.20mm. I've had some success using small pieces of beer can, and using the method where you first press a small dent into the metal, then sand it away from the other side using very fine sandpaper or a knife sharpening stone. It's easier to control the final size that way than it is by simply pushing the needle through the foil.

Ok, i'll try it.. Should I try 120mm film?

Pinhole problems

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