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| Making a Large Format Camera |
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| SwarfnStuff:
Hmm, Just me thinking here. :scratch: Uncle asked for a large format pinhole camera and we are making a far more complicated jigger. Bit like the camel being a horse designed by a committee?? :lol: Anyway, if you can get a suitable lens (cannibalise an old instamatic perhaps) it would let more light through with shorter exposure times. I envisage uncle standing, bent with his head under a black hood focusing an upside down image before putting the paper / film substitute in and exposing his masterpiece. Good exercise for the grey matter though. So next will be the tripod?? John B |
| efrench:
http://www.f295.org/main/forum/ will get you to the forums which appear to be still active. |
| Alan Haisley:
If it's a true pinhole camera it doesn't need a focusing mechanism. Pinholes have near infinite depth of field. |
| Will_D:
--- Quote from: efrench on July 31, 2016, 07:34:30 PM ---Xray film is another inexpensive option. --- End quote --- Suggest you Google "Panchromatic versus Orthochromatic film emulsions and their responses". Pan: Sensitive to most of the visible spectrum Ortho: Sensitive to one base frequency Xray: Sensitive to Xrays !! IR: Sensitive to IR end of spectrum UV: (If you can find/afford it) Sensitive at tother end of spectrum Litho: Specialist films sensitive to bright ligt, no spectral curve used for phot engraving and also "Tone sparation techniques and Solarisations effects. (Note all these can be done digitally!) |
| efrench:
--- Quote from: Will_D on August 01, 2016, 04:47:16 PM --- --- Quote from: efrench on July 31, 2016, 07:34:30 PM ---Xray film is another inexpensive option. --- End quote --- Suggest you Google "Panchromatic versus Orthochromatic film emulsions and their responses". Pan: Sensitive to most of the visible spectrum Ortho: Sensitive to one base frequency Xray: Sensitive to Xrays !! IR: Sensitive to IR end of spectrum UV: (If you can find/afford it) Sensitive at tother end of spectrum Litho: Specialist films sensitive to bright ligt, no spectral curve used for phot engraving and also "Tone sparation techniques and Solarisations effects. (Note all these can be done digitally!) --- End quote --- Recommend you visiting the Large Format Photography forums: http://www.largeformatphotography.info/forum/index.php. Many of the posters there are using X-ray film very successfully. |
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