D70s Pinhole

I created a pinhole "lens" for my camera, here are the results after lots of trial and error. Both 30s at what I estimate to be somewhere between f/60 to f/120. The colour rendition is incredible as is the contrast and gradation between tones - if only I could get it sharper I would sell all my glass
Does anyone know how I can get the camera to take a light measurement for the shutter speed? I imagine it would be the same as using a lens that requires manual setting of the aperture.
ISO 200
ISO 1600


Does anyone know how I can get the camera to take a light measurement for the shutter speed? I imagine it would be the same as using a lens that requires manual setting of the aperture.
ISO 200

ISO 1600
