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  Photography Forum: Photography Help Forum: 
  Q. image quality

Asked by Allison Kuznia    (K=562) on 9/7/2006 
Okay. This is probably another one of my dumb questions. Let me try to explain this as best as I can...

I shoot with a Digital Rebel, usually on ISO 400, with the "Quality" set to LARGE. I then transfer the pictures to my computer and open them up in Photoshop (where they are usually around 18M, 2000 x 3000 pixels).

I will then make them they size I need to print them by using the crop tool (for instance, crop tool set at 8x10 inches at a resolution of 300). And then I will touch up said photo and sharpen and so on.

My problem/question is that they just aren't looking as crisp as I think that they should. I mean, even before they are resized, they don't look crisp and sharp.

EXCEPT...

For when I resize to a 4x6 inch size at 300 resolution. Then they are look great. But anything bigger than that I seem to have trouble with.

And when I resize for the web (again using the crop tool set to 4x6 inches, but this time at a resolution of 75).

What is my problem? How can I get my 8x10's to look as sharp as my 4x6's and web images?

Thanks.


    



 Gerhard Hoogterp   (K=4863) - Comment Date 9/7/2006
If I understand your workflow you start with an image which is suitable for a4 printing. You throw away (crop) whatever you don't want and the result you blow up to the size you want.

If you crop the image to 4x6 there will be 1200x1800px left. To get those to print on 8x10 you will have to resize them to 2400x3000 again.

Or in different wording, you throw away a lot of pixels and then try to get them back again.. To keep the photo's sharp you should try to get the piece you wanted in the full 3000x2000 so you don't have to crop. The resulting file can be downsampled for 4x6, but hardly needs work for the 8x10 print.

Iso 400 is also on the high side.. lower iso gives beter quality images.




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