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1. Re: Photoshop CS6: Question about Resolution when Post-Cropping Film Scans
station_two May 31, 2013 2:21 AM (in response to Page D)Of course cropping does not reduce ppi.
I highly recommend reading this very comprehensive site in its entirety:
Keep in mind that with increasing scanning resolution you begin to pick up the film grain itself. It depends on the film you're dealing with, so run a few tests at 2400 ppi and higher to determine the optimal scanning resolution beyond which it doesn't pain to scan at such high resolution. 2400 ppi seems to be the breaking point in the opinion of some photographers. Your mileage may vary, of course.
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2. Re: Photoshop CS6: Question about Resolution when Post-Cropping Film Scans
Trevor.Dennis May 31, 2013 3:06 AM (in response to station_two)One thing I'd be careful about, if you are going to scan beyond the image borders, is having the scanner get things wrong because of the additional area of clear film in the frame. What is this scanner, and what software will you be using?
BTW I scanned my deceased dad's large transparency collection a few years back. It was a labour of love, and done for the family, but never ever again!
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3. Re: Photoshop CS6: Question about Resolution when Post-Cropping Film Scans
Page D May 31, 2013 3:44 AM (in response to station_two)Thanks for that.
The scanner is a Reflecta Proscan 7200. For your information, I am in London. I think this brand is known as 'Pacific Image' over in the US, but I don't know the Pacific Image brand's equivalent model number (or whether there is, indeed, an equivalent model over in the US).
Here is an excellent review on this scanner:
http://www.filmscanner.info/en/ReflectaProScan7200.html
It concludes that this scanner's 'effective' optimal resolution, i.e. what you get, in practice (despite the manufacturer's claim of 3600ppi) is approx 3250 ppi.
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4. Re: Photoshop CS6: Question about Resolution when Post-Cropping Film Scans
Page D May 31, 2013 3:52 AM (in response to Trevor.Dennis)Hi.
The scanner is a Reflecta ProScan 7200. As I said to station_two, I am in London. I understand the brand is known as 'Pacific Image' over in the US.
The scanning software I will be using it with will be 'SilverFast Ai Studio 8'.
Do take a look at this excellent review of the scanner:
http://www.filmscanner.info/en/ReflectaProScan7200.html
(I may be incorrectly assuming too much when on these forums that I am speaking exclusively with folk from the US - the way you spell 'labour' makes me think you are not from the US?)

