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It's a software to enlarge photos. You can read more about it here.

I have known about this software since scanning mf slides.

Anyone know of a website/article that can give some rule of thumb advice as to when you should consider using this program.

(something to do with ratio's and file size?)

Did a websearch and found a bunch (also prices as low as $99)

http://www.shutterbug.com/equipmentreviews...uine/index.html
Here is a good one about Genuine Fractals from shutterbug.com

just do a google search on Genuine Fractals

GF is great for res-ing up larger files. If you start with a file that's 50 mb's or larger than the results are the best available. Anything smaller and you might as well use your raw processing program or photoshop.

Chris

> Anyone know of a website/article that can give some rule of thumb advice as to when you should consider using this program. (something to do with ratio's and file size?)

See for example Ron Bigelow's articles on interpolation:
http://www.ronbigelow.com/articles/interpo...terpolation.htm
http://www.ronbigelow.com/articles/interpo...erpolation2.htm
http://www.ronbigelow.com/articles/interpo...erpolation3.htm