Field of view converter

Verify, but the warning can be ignored if it's actually correct you could let me know about the facts of that situation. But meaning, if you select a movie aspect ratio in a camera, this correct aspect ratio selection specifies both, as " in camera". The warning makes the standard assumption that native crop factors less than 2x should be , or equal or larger than 2x should be with exception for 2.

Actually, I use 1. Rounding : Four or five significant digits may be shown, but inputs of focal length or distance or sensor size or aspect ratio values are rounded values, not that precise the math is accurate, but camera specifications round things.

In math, the final answer can only contain as many significant digits as the least precise value. A couple of significant digits should always be believable. And I do know that, but the excessive digits are shown in case those results are reentered to recompute back to original values, avoiding additional round-off.

That's just my whim to aid verifying all results are accurate. But for example, if you might claim the calculator does not compute your precisely measured field dimensions, then use them in Option 9 to compute your probable actual focal length. It is simple geometry, except focal lengths are approximated values.

Rounded as mentioned, and also, the focal length marked on the lens is when focused at infinity. It generally becomes a little longer at close focus distances, except internal focusing can also change focal length to other values.

And zoom lenses report focal length in steps, not with full precision. Magnification of field size from sensor size can also compute actual focal length.

But these rounded issues are generally not much problem for routine Field of View work. Knowing an accurate distance to the field is usually the main problem.

Accepted Ft' In" Input Value 8. You can click the Green button again to toggle this option off or on. The Four distance fields above with green borders the top Distance, and one in Option 6, and two in Option 9 will always accept distance input in either distance format.

The chart at right shows accepted Ft' and In" formats and always works in these green borders, whether if in Ft" In" mode or Not. Feet or inches can be decimal fractions, or inches can be present or not, and the ' or " marks can be present or not. Meaning, in these four fields, two values with a space between will be interpreted as feet and inches. Any single value is feet or meters , as you intend as your choice, but any second value is assumed to be added as inches added to feet, regardless of any ' or " on it the ' " , or space here are just non-numeric field separators.

So you can always enter feet either way, just as decimal feet without the inches, such as 8. Do use a simple clear method, and I'd suggest that entering fractional 8. You can verify how the distance result was interpreted, as seen on the Magnification line of the results.

The term Native about sensor dimensions, aspect ratio, or crop factor is used to mean the actual full size of the original chip area before cropping to other smaller formats like for example. The original size might not be exactly a nominal or aspect ratio, which is probably very minor, but the calculator accepts any size. Select an Option, and click the Compute button for all Option numbers.

Options are four ways to specify sensor size. Options 6 to 8 compute special requirements using the sensor size currently specified in options Option 1 - Best accuracy is when entering actual exact sensor dimensions width and height in mm, from actual camera specifications, for any aspect ratio.

If you know them, use them. Head to a calculator like Desmos and type in exactly what you see above. Lastly you would change 6. The output is the sensitivity you would enter into game 2. The process is daunting and inconvenient which is why this is usually hidden behind paid tools.

If you have the patience to learn the process you can make these calculations relatively quickly, especially if the FOV and yaw values of your games are common knowledge. Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.

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For example, a mm focal length lens mounted on a digital camera with a "1. It's still a mm focal length lens, but it acts like a mm lens would on a full frame camera. What we're really most interested in from a photographic viewpoint is the Field of View. If we want a wideangle shot we want a wide field of view say, 84 degrees horizontal. If we want a "normal" shot we want a "normal" field of view say, 40 degrees horizontal and if we want a telephoto shot, we want a narrow field of view say 6.

For those used to thinking in terms of 35mm cameras these would correspond to lenses with focal lengths of 20mm, 50mm and mm respectively. However for 4x5 camera users, they'd think in terms of a wideangle 80mm lens, a mm normal lens and a mm telephoto lens. Note that these number are the same as the 35mm numbers divided by a "1.

Rectilinear and Fisheye Lenses There are two types of lens you'll find in photographic use. The first is the rectilinear lens , This is the typical lens which renders all straight lines in the subject as straight lines in the image see diagram below.

It's pretty much the way our eyes see things and it's exactly the way a pinhole cameras sees things. For normal and telephoto use, a rectilinear lens is ideal, however for extreme wideangle use it isn't. Objects near the edges of the frame in very wideangle shots are "stretched".

It's also impossible to make a rectilinear lens with degree hemispheric coverage. In fact it's very difficult to make a rectilinear lens with more than about degrees of horizontal coverage.

The second type of lens is the fisheye lens. A fisheye lens renders straight lines which don't run through the center of the frame as curved though lines running through the center remain straight. Objects at the edges of the frame are not stretched, but they are distorted. It's easy to make a lens with a diagonal coverage of degrees "full frame fisheye" or even with a horizontal, vertical and diagonal FOV of degrees "circular frame fisheye" - though this results in a circular image with the rest of the frame dark.

Fisheye lenses were first made for scientific use, since with hemispherical coverage they can image the entire sky on a single frame and so were useful for astronomical and meteorological studies.

The first "fisheye" camera was a pinhole camera that was filled with water, but luckily technology has come up with more convenient ways to make fisheye images!

The illustrations above show the pinhole model of rectilinear and fisheye lenses. However, sometimes you can get a thing as I described here. Still, after spending some time and money, I used this microscope to prepare illustrations for all microscope calculators that you can find on this web site, including this calculator.

I am going to use this microscope for a long time. This article was written by Anatoly Zolotkov. Microscope and Camera Resolution Calculator. Microscope Magnification Calculator.

Digital Microscope Magnification Calculator. Microscope Depth of Field Calculator. Microscope Objective Focal Length Calculator. This online unit converter allows quick and accurate conversion between many units of measure, from one system to another. The Unit Conversion page provides a solution for engineers, translators, and for anyone whose activities require working with quantities measured in different units.

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