The way most labs are set up (almost all in fact) is that all film that is manufactured for a specific process (ECN-2, for example) will get processed in the same chemistry for the same amount of time, unless an adjustment is requested (and paid for) by the client.
In the case of taking a film that has been rated by the manufacturer at 500 and 'rating at 250', you would be overexposing the film in camera, as if it were a faster film stock. If you then processed the film 'normal' you would end up with a denser negative, with no change in granularity or contrast. Likewise you could process this film as 'pull 1-stop', which would yield a negative of normal density with decreased granularity and slightly flattened contrast. In either case you could have adjustments made in printing or transferring to correct for color shifts and proper exposure, leaving the granularity unaffected. With Vision3 stocks, you can easily over or underexpose by 1 stop, process normal, and have brightness and color corrections made in the print/transfer, while retaining the original granularity. Working the other way, say taking a film that has been rated by the manufacturer at 500 and 'rating at 1000', you would be underexposing the film in camera. If you then processed the film 'normal' you would end up with a thinner negative, with no change in granularity or contrast. Likewise you could process this film as 'push1-stop', which would yield a negative of normal density with increased granularity and slightly increased contrast. Again, these could be corrected for color and brightness in printing or transferring, while retaining the granularity of normal (normal grain) or push-processing (increased granularity). -Jason Halprin ________________________________ From: Lars Fuchs <edi...@klipper.tv> To: Experimental Film Discussion List <frameworks@jonasmekasfilms.com> Sent: Thursday, March 14, 2013 4:42 AM Subject: Re: [Frameworks] fast film I wonder if anyone could clarify for me what exactly 'rating at 250' means in this context. Does this mean metering as if the film was 250ASA, and then doing all lab work the same, without pushing or pulling in anyway? Or does it mean something else? begging forgiveness for my ignorance, LF
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