I have been asked to shoot a series of Posters (6 sheet)digitally for a client. There are a number of elements in each shot which will be added to the main image in post production by the agency.
I understand from reading Martin Evenings Photoshop book that output resolution on a poster and consequently file size would be less (i.e 75ppi) than on for example a colour DPS.
We shoot adshels frequently and the artwork size we supply is 45cm x 30cm @ 300ppi, generally about 110mB in RGB. The separations are then enlarged to the final size, so the screen is very much coarser than with press.
However it seems to me that as there is a large amount of post production work to do, it would be sensible to supply the files at 300ppi.
However if you're supplying individual elements that they're going to assemble you probably would want to supply them as a higher resolution.
Obviously this would create a massive file size and I would be interested to receive comments regarding the best way to supply these images to the agency.
Since they're not the full size of the poster however I don't see why they should necessarily be that overly large.
I anm shooting on a Sinar 23HR which in 4 shot mode provides a raw file of approximately 36mb.
BTW our adshels (and 48$ sheets, which require smaller files) are also shot on a 23 back. It interpolates up 200% without any loss of quality, and can do 300% on most subjects if you're selective about the sharpening.
Mike -- Mike Russell
020 8740 4634 Mouse in the House London http://www.mouseinthehouse.co.uk
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