This two images were taken with a 0.420mm pinhole and the same time exposure 25min.
Do you think the flare is actually UV light. If I use UV filter does it solve this flare problem?
Attachment 68498 and Attachment 68497
And this is from 0.390mm pinhole:
I am using Ilford exposure calculator and It works very well for me. Thank you.
[QUOTE=marciofs;1495939]This two images were taken with a 0.420mm pinhole and the same time exposure 25min.
Do you think the flare is actually UV light. If I use UV filter does it solve this flare problem[QUOTE]
My first guess would be light reflections inside the camera. Did you paint the inside matt black and cover the metal of the pinhole with black tape?
Or did you take the photo into direct sunlight? I supose you don't have light leaks?
I don't have light leak.
I covered the metal around the pinhole but a little bite is not covered. Or maybe the larger hole which is curved may reflect the light. I will try to correct it.
Actually I don't think there is any reflection inside because these photos doesn't have flare:
Attachment 68508 and Attachment 68509
This flare seems to come from straight sky light, but none of them were direct from sun light.
I don't know. I have seen something like that when the sun reflected into the pinhole. One of my cameras has a 1/4" drilled hole in the side of a can, and the pinhole is taped inside the can. The edges of the 1/4" hole are shiny, and a glint of sun can reflect directly onto the pinhole. It causes something similar.
The exposure in the 2nd one looks very good.
I like UV reflection in the air or mist, but I don't think it could be that strong.
It is the same then because what you described your pinhole is the same as I have in my camera.
Istead of trying to improve this camera I will make a 7x9in one so the contact prints will be nicer. :)
Thank you very much for the help. I think I got addicted to it. I just love it. :)
Could you explain the stacking of paper in the camera. Are the image showing the fog from this process. Light will pass through a sheet a paper.
It's so much fun, I love it too! There is something very free and liberating and also magic about making a photograph with no lens. The light goes directly onto the paper--- magic!!
Originally Posted by marciofs
You may want to check out http://www.f295.org/main/forum/. It is a great forum with a community of people who love pinhole photography.
Have lots of fun... I predict you will be building one even bigger soon!
I put black hard paper between them.
And the last photos I posted I had only the single paper in the camera.
The fog problem is the same as NedL said he had on his one of his camera.
Because pinholes are so small it is easy to improvise a very efficient "lens" hood for them. This should eliminate most flare problems when there is a lot of sky around the subject or when the sun is just outside the picture area.