What Does Focal Length Mean? In optics and photography, the focal length is the distance from the optical center of the lens to the imaging sensor when the lens if focused at infinity. The focal length is measured in millimeters. Focal length directly affects the size of the image captured,...
What does the focal length number mean? The focal length number tells us how much of the scene is captured in the picture. The lower the number the wider the view, and the more we can see. The higher the number, the narrower the view, and the less we can see. This is illustrated ...
However, only a few dSLRs use full-frame image sensor, with most using a smaller image sensor, usually APS size (or roughly half-frame). That is why you will read that a focal length multiplier of, say, 1.6 needs to be applied to the focal length of the lens to obtain the "true ...
Now that we know the physical definition of focal length, what does this actually mean to us as photographers? How does focal length impact the images we take? To begin, let’s start with a simulation of what is called “angle of view” or “field of view.” Take a piece of paper a...
But what does this really mean? I have already discussed equivalent focal length in the articlePhotography Basics – Focal length, though I will cover it again very briefly in this article. But mostly I want to look at the idea of equivalent aperture, and how this relates to depth of field...
focal length not calibrated tiáo jié jiāo jù 调节焦距 focalize cè jiāo jù 测焦距 take the focus jìn shì yǎn de jiāo jù bǐ zhèng cháng yǎn jing de yào gèng duǎn 近视眼的焦距比正常眼睛的要更短。 A near-sighted eye has a shorter focus than a normal eye. zhè fù shu...
What does it mean if rowCount in resultSet returned by RdbStore.query() is -1? How do I read data from a local or preset database? How do I embed database data into an application? How do I ensure that only one write operation is performed at a time in an SQLite-based data...
What does it mean if rowCount in resultSet returned by RdbStore.query() is -1? How do I read data from a local or preset database? How do I embed database data into an application? How do I ensure that only one write operation is performed at a time in an SQLite-based data...
What does focal ratio mean in telescopes? What is collimation in telescopes? What type of telescope uses a concave mirror? What kind of light does the Hale Telescope pick up? What is a reflecting telescope? What is the Hale Telescope used for?
What does ocular mean? Define the lens of the eye. What is anisometropic amblyopia? What is coloboma of the optic disc? What is focal vision? In which layer of the eye is the choroid? What is bilateral coloboma? What is bilateral hyperopia?