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Gez
Tinkerer
Username: Gez
Post Number: 140
Registered: 09-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 13, 2009 - 06:32 am: | 
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Does anyone know the best way to copy a negative so as to produce a transparency? I have tried copying a negative onto normal print film, a positive image is produced but of thin density with a color cast. The motion picture industry produces release copies in this way so there must be an easy technique?? |
Contax_crisis
Tinkerer
Username: Contax_crisis
Post Number: 25
Registered: 08-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 13, 2009 - 11:56 am: |
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There are a number of techniques, some using internegatives; others using direct reversal slide copying with select materials, such as Kodak Positive Release film as well as traditional duping with an enlarger to create a larger negative.
Perhaps you need to clarify whether you are trying to produce a black and white slide from a black a white negative; a black and white slide from a colour negative; or a colour slide from a colour negative. The description is quite laborious, as is the technique, and it is also my least favourite chore!
Regarding your post for an 'easy technique'; digital scanning of your original negative and laser output to a slide is one option, however it isn't cheap.
From what you describe in your post, you may need to reconsider whether you are imaging at 5,000K - 5,500K, and whether colour temperature will affect the overall duping process too. This is true for black and white duping, as well as colour work. |
Hanskerensky
Tinkerer
Username: Hanskerensky
Post Number: 12
Registered: 05-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 13, 2009 - 12:21 pm: |
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Yes, i agree, more information about the purpose is needed.
btw I think that motion pictures are (were) usualy made with transparancy film. That is easy to duplicate to either negative or slidefilm.
Maybe one other thought,although i don't know if it's feasable :
Scan the negative and show the converted image on a LCD Color Flatscreen. Then make a picture of the screen with a camera loaded with slidefilm and use a slow shutterspeed (1/30 or longer).
But probably you will loose too much quality in this way. |
Mndean
Tinkerer
Username: Mndean
Post Number: 159
Registered: 08-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 13, 2009 - 09:46 pm: |
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Just to clarify the information above, professional 35mm and 16mm motion pictures were made mostly with negative film in the camera (it was a rare occasion when transparency was used), while amateur 16mm and 8/S8mm motion pictures were almost always done with transparency. Professional motion picture prints were done by being struck off an internegative, so the original camera negative wouldn't get damaged to make release prints. |
Hanskerensky
Tinkerer
Username: Hanskerensky
Post Number: 13
Registered: 05-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, September 14, 2009 - 09:12 am: |
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Thanks for that clarification Mark ! I just got that wrong.
Do you btw know which steps where necesarry to make a cinema (projector) copy of these motion film negatives ? |
