![]() You can also see that any print size that has the same aspect ratio as your camera (2x3) will keep the photo entirely intact nothing will be cut off due to cropping. You can see that printing an 8x10 of the photo (5:4 ratio) would cut off the subjects on both ends of the picture, whereas a 5x7 print would cut off the open space on both the left and right of the photo. The example below shows how different print sizes would crop out important parts of the photo. But there are a few common aspect ratios every photographer should know. Technically, there is an unlimited number of aspect ratios. Depending on the desired print size and how the image was shot, you may lose a lot (or just a little) of the picture this could be significant if you shoot close and tend not to leave a lot of space around your subjects. When your client wishes to purchase a print, any print size that is not on a 3:2 ratio must be cropped, meaning a piece of the photo will be cut off. (If you use an Olympus or Panasonic camera, you may have a 4:3 ratio.) Your DSLR camera most likely has a 3:2 ratio. Because cropping is inevitable when ordering certain print sizes, it helps to understand why and how each image will be affected when printing.Īspect ratio is simply a measurement of a photo's width to height. We do not shrink or resize any of your files before submitting them to the lab. This means that to have a successful image it must be properly exposed or slightly underexposed and brought back in a raw editor.When you submit a print order to one of our partner labs, you'll want to be certain that the crop you have approved during the Lab Approval Process is not cutting off a significant piece of the image. In general, the majority of the image data is located on the right side of the histogram. That seems obvious, but there are ramifications of this. You can read more about file formats here. Even the final one should be a non-lossy image format like PSD or TIF. JPEG is a lossy format, so you never want any of your intermediate steps to use JPEG images. Before you startīefore I start, I always use a RAW file from the camera, not a JPEG. Ideally, to get the 300 dpi, we will want to print an image that is 10,800 x 7200 pixels. 36 x 24 is a 3:2 ratio and my image is at a 4:3 ratio. In addition, the proportions are not exactly the same. Suppose we want to print a 36″ x 24″ image. The resolution of the image is 5184 x 3888 pixels.ĭoing the math, for a print at 300 dpi, the largest size for the native image (not resized) is 17.28 inches x 12.96 inches. I shoot micro 4/3s (MFT), so my image sensor is a 20.1-megapixel sensor that produces raw files that average in size around 17 to 18 megabytes. To scale the images, here is the process I follow. Each image can take up to 5 minutes, depending upon size. That is because it uses AI to create the missing pixels to come up with a proper scaling that interpolates new pixels that work with the image. This is a slow process and CPU intensive. Gigapixel AI uses artificial intelligence to look at the image compared to millions of similar images and creates new pixels with this algorithm. However, significant changes in size of images can be particularly problematic.įor scaling larger, I have found the best way to increase the size of an image, as of the beginning of 2020, is to use a product from Topaz called Gigapixel AI. Even for a 36-megapixel image, you only end up with printable dimensions of 24.5″ x 16.4″.Īs you get close into the image, you can see the pixelation.Īlthough Photoshop has improved much of its algorithms for image size changes, these work reasonably well for smaller changes in size. If you use 300 dpi to give you a print, the maximum size is 14.3″ x 9.3″ (this is not overly large). For example, a 12-megapixel image (common cell phone resolution) on a 3:2 sensor translates into pixels that are roughly 4290 x 2800 on the sensor. If you simply use pixels, there is no weird conversion. This means that megapixels divided by dpi will give you the maximum dimensions natively produced by your sensor. ![]() When you print, typically, you are looking at print resolution, in dots-per-inch (dpi) rather than megapixels, that is appropriate for the medium and the size of print you are going to make.įor most print media you might hold in your hands, you need a minimum of 300 dpi. In order to actually print it, you need to figure out how big you want your print and then do some very basic math to figure out what works best for your image. ![]() Megapixels just provides you with the total number of pixels. ![]()
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