Production Maximum Image Resolution?

[terardin]

I am a Ball State University student in a Digital Publishing class. We are working on the production of a cookbook that will be printed sometime this semester. Each page will be 8X10 Landscape, and we want to have some full-page images. The images we get from the photographer were taken on a Canon 30D camera with 8.2 mega pixels. When we open them in Photoshop they are 14.6X9.733 with a 240 resolution. We are producing on a 175-line screen. How far can we push the resolution and still maintain a quality image at a size of 8X10?

 

[gordo]

The original image size out of the camera is:
48.667" x 32.444" @ 72 dpi

So, at 175 dpi - the minimum resolution you might get away with for a 175 lpi screen, the image size would be 20.023" x 13.349"
At 350 dpi - the maximum resolution yo would need, the image size would be 10.011" x 6.674"
Many RIPs are set to resample incoming images to 300 dpi. At 300 dpi (which should work fine), the image size would be 11.68" x 7.787"

You'll be fine. gordo

 

[marktonk]

terardin,

As an old scanner operator, the rule of thumb for resolution is 2 x's the line screen. 175 line x's 2 would be 350. Gordo is correct, you have enough resolution and should not have any problems.

Regards,

Mark

 

[juergenroesch]

off topic:
I wish Adobe would update their Distiller defaults from 300dpi to 350dpi as fewer and fewer printers are still doing 150lpi. Some even push to 200lpi and still complain when preflight shows any images higher than 300dpi ...
All this scanner operator knowledge - where did it go?