Print resolution calculator full#

If you already know the final size at which a particular image will be printed, you can easily determine the minimum resolution you’ll need by multiplying the dimensions (in inches) by 300. Of course, it’s often useful to be able to crop into these large files and retain detail and image quality, and it’s always better to have too much resolution than not enough. If you’re shooting any of these high-megapixel cameras and printing your photos at smaller sizes than those listed above, you’re theoretically wasting resolution, as the camera is capturing more detail than the human eye can see. Or, to work backwards, using the resolution of your camera, you can determine the maximum print size at this magical pixel density. In order to determine the ideal resolution of an image at 300 ppi, you still need the finished size of the image. This benchmark of 300 ppi still doesn’t quite bring us to the resolution we need, as ppi only describes pixel density, and is therefore only part of the equation. So, if we slightly exceed this number, 286, up to a nice round 300 ppi, people with 20/20 vision will no longer be able to see individual pixels, and your photo will look smooth and sharp, from a distance of 12 inches. Finally we’ve gotten back to a measurement that photographers are used to. To determine the resolution of the human eye at a distance of 12 inches, we would divide 12 by 3438, and we get about 0.0035 inch. Let’s convert this to a more applicable scale. However, we don’t generally look at photos from over half a mile away, so this number still doesn’t get to the heart of the matter. Of course, most adults have worse than 20/20 vision, and some have better than 20/20, but as this is the standard for fighter pilots, let’s use it as a basis for our measure of what we “need” in a photo.

Using the candle example again, this means that someone with 20/20 vision would be able to begin to differentiate the candles, 1 foot apart, from 3,438 feet away, or 0.65 mile. I hear you asking, nay, begging the question: what is the resolution of the human eye?Ģ0/20 vision is described as being 1 arcminute. This is a necessary basis element to understand.

Print resolution calculator full#

For reference, the size of the full moon when viewed from earth is about 1/2 degree or 30 arcminutes. This relationship between size and distance can be described as an angle, in degrees or arcminutes, where 1 degree = 60 arcminutes. In order to see that there are, in fact, two candles, you would need to move them further apart, or get closer to them. At this distance, you would most likely be unable to tell if you were looking at one candle or two. Imagine that you’ve lit two candles, placed them 1 foot apart, and drove a mile away from them. To calculate this ability, you need two key pieces of information: the distance between the two points, and the relative viewing distance from those points. Resolution is essentially the ability of the human eye, camera sensor, printer, or screen to differentiate between two points. What is Camera Resolution?įirst, it’s important to understand what we’re talking about when we describe the resolution of a photo. For example, we have standards in place to describe the abilities of the human eye, and unless your intended audience is a nest of bald eagles, these guidelines can suggest the point of diminishing returns, resolution-wise. Naturally, the answer to this question will be a personal one and dependent on a number of factors, but there are a few constants that can help you as a photographer, to answer it for yourself. However, in this relentless contest for king of the resolution mountain, it seems rare that we stop and ask the question: how much resolution do we actually NEED?

As an Amazon Associate I earn from qualifying purchases.The trend of packing more and more pixels onto our image sensors doesn’t seem to be slowing down, as every year we marvel at the newest staggering megapixel number, only to see that number surpassed mere months later.

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