Can a Canon 5D Mark III file print sharply at 40x30 inches?
Asked 8/23/2020
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I have a RAW file from a Canon 5D Mark III and want to make a 40x30 inch print. What print resolution/PPI should I use, and will it still look crisp at that size? I’m trying to understand how the camera’s pixel dimensions relate to print size and viewing distance.
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
5y ago
2 Answers
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Preference for PPI will vary based on what it is and how close people will be to it looking at it. For looking up close at a photo the most you should need is 300ppi but it can definitely still look good at lower. The size you can print while maintaining a certain ppi is based on the size of the sensor in your camera. Your sensor is 5760 x 3840 pixels so you divide that by the amount of pixels per inch you want in your print. If you print at 200ppi then 5760/200=28.8 and 3840/200=19.2. So the largest you can print and keep around 200ppi is about 30x20. If you print at 40x30 you will be closer to around 130ppi and that might be ok depending on what you are doing with it, but it likely won't look very crisp up close at that size.
You also have to take into account if you cropped the photo any. When you do that you remove pixels from the image so in those situations you would start with less than 5760 and 3840 to calculate it and maintaining the same ppi would mean a smaller print.
Originally by user94705. Source · Licensed CC BY-SA 4.0
user94705
5y ago
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Generated from our catalog & community — verify before relying on it.
A 5D Mark III file is about 5760×3840 pixels. Print size depends on dividing those pixel dimensions by the print PPI:
- 300 PPI: about 19.2×12.8 in
- 200 PPI: about 28.8×19.2 in
- 40×30 in would be only about 128–144 PPI, depending on orientation/cropping
So yes, you can print at 40×30, but it probably won’t look truly crisp when viewed up close. It may still look good if it’s a strong file and the print will be viewed from farther away.
A practical guideline: for close viewing, 300 PPI is a common target, while lower PPI can still work for large prints. Cropping reduces your available print size further.
Also, overall image quality matters as much as pixel count: sharp focus, low noise, and good detail in the RAW file. If the image doesn’t look very sharp on screen at 100% view, a very large print won’t improve that.
If you’ve never printed this large before, do a test print first if possible. Large prints often need brightness and sharpening adjustments that don’t show the same way on a backlit monitor.
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