Gallery, Projects and General > Project Logs

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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