A few years ago I read Scott Kelby's take on this in one of his books for Elements 2 or 3. He demonstrated blowing up a picture repeatedly by a factor of 1.05 each time.and even created a little macro to do it. He claimed not to understand why it worked, but said it did. These were jpegs too! I tried it once, but didn't take it to the stage of printing. Roger ----- Original Message ----- From: <fotofx@xxxxxxxxxxxxx> To: "List for Photo/Imaging Educators - Professionals - Students" <photoforum@xxxxxxxxxxxxxxxxxxxxxx> Sent: Monday, December 18, 2006 5:40 PM Subject: Re: Blowing-up a file > Hi Guy, > > I am curious to hear the answer too. I just purchased a LF printer canon W6400. My printer came with RIP software and it will take a while to learn to use it. I think it depends somewhat on what printer you need to use, if it is a LF service company they will have the software to upsize your image for you. There may be a charge for it but really they are the best for knowing how their printer works. > > Les > > -----Original Message----- > >From: Guy Glorieux <guy.glorieux@xxxxxxxxxxxx> > >Sent: Dec 18, 2006 1:44 PM > >To: List for Photo/Imaging Educators - Professionals - Students <photoforum@xxxxxxxxxxxxxxxxxxxxxx> > >Subject: Blowing-up a file > > > >I am interested in knowing the group's experience with blowing-up files for > >printing to very-large format. I am working with a Sony A100 10 megapixel > >DSLR and I am curious to find out how far I can blow-up a picture. > > > >What is the best program to use? How far can I go on enlarging the file? > >What is the best procedure to use (i-e a 1-shot increase with unsharping at > >the end or several smaller size enlargements with a small dose of > >unsharping). > > > >Thanks in advance. > > > >Guy > > > >