Full Frame vs. Full Image

One of the reasons people are sometimes disappointed by prints made from digital camera files is  usually not the quality of photograph but what’s missing. What’s missing might be Uncle Bernie who was on the edge of the group photograph you made at last year’s family reunion. It’s not that you don’t like Bernie— when you look at the file on a computer he appears in the image—it’s just that he’s a victim of a difference in aspect ratio between your camera and the print.

Aspect ratio is the relationship between the height and width of the image and is usually expressed with two numbers. Traditional 35mm film cameras and full frame digital SLRs use a 24x36mm (3:2) format but cameras are available that shoot in different aspect ratios and that fact can cause problems when making prints on standard-sized paper. A 4×6 print, for example, has an aspect ratio of 3:2 making it perfect for some cameras (no cropping) while an 8×10 has an aspect ratio of 4:5 making it “ideal” for others.

aspect

There’s a more here than just mismatched aspect ratios. Digital camera sensors are often cropped internally to match up with one of the standard print aspect ratios and that can cause problems in the “what you see is what you get” department. If you’ve ever made a picture and knew you captured the entire image but somehow the file seems “cropped” you know what I’m talking about. Sometimes this mismatch only crops the image a little tighter and sometime a photo can benefit from being a little tighter anyway so it may not be a problem with most of your shots but difficulties can occur when a subject gets too close to an edge.

The above (left) photograph was made with an Olympus camera that produces images with an aspect ratio close to that of 4×5 or 8×10 prints. Problems occur when you decide to make a 4×6 or 5×7 print from this file. When cropped into a 4×6 print (right) the bike rider gets dangerously close to the edge and since automated photo printers often crop somewhat from all the edges anyway, my guess is that an actual 4×6 print made from this file would clip the rider’s elbow. No big deal you say for this photo but what about a group shot of your son’s preschool class? You could crop one of the kids on the edge of the frame in half!

Sometimes the best way to solve the cropping dilemma is to change the print size, which in turn changes the print’s aspect ratio. 5×7 is slightly different (wider) than 4×6 but by now you should begin to understand the cause of the problem.

50pathsLook for my review of Michael Freeman’s new book 50 Paths to Creative Photography: Style & Technique in an upcoming post. It’s available from Amazon and all the usual suspects including your local book or camera store.

Author: Joe Farace

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