I think I was getting to much reflection off of the metal that the pinhole is in. So I blacken the metal. I seems to have improved the picture quality somewhat.
here are a couple the latest pictures taht I took with my Nikon D50. I changed the focal length of the pinhole by adding about 1 1/2 inch tube to the body cap and putting the pinhole at the end of the ube. It doesn't seem like it has improved the picture sharpness at all (in fact it seems more blurry).
Here are 5 of my latest pinhole images taken with my large pinhole camera. I'm still working on getting the exposure right.
btw the plane is the seaplane that appeared in the Raiders of the Lost Ark movie. It is at the Western Aerospace Museum near the Oakland Airport. You can take a tour of the plane and sit where Indiana Jones sat.
I took this picture with my latest pinhole camera that can take 8x10 images. The only photoshopping that i've done to the image is to crop it and adjust the levels. I think it looks kind of spooky like one of those Twilight Zone episodes.
I took these pictures with my Nikon D50 pinhole camera. btw after about 10 times of use my Nikon has dust on the sensor and needs cleaning. I had to remove about 1/2 dozen dust specks from these images.