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There's one more item your iPhone can replace — a magnifying glass. We're taking a look at the iPhone's Magnifier app, a super useful free tool that allows you to magnify using your iPhone's camera.
The contents of the box of an iPhone 4. From left to right: iPhone 4 in plastic holder, written documentation, and (top to bottom) headset, USB cable, wall charger. Modern iPhone models (until the iPhone 15) include a lightning to USB cable. Starting with the iPhone 15, Apple included a USB-C to USB-C cable in place of the Lightning to USB cable.
Optical magnification is the ratio between the apparent size of an object (or its size in an image) and its true size, and thus it is a dimensionless number. Optical magnification is sometimes referred to as "power" (for example "10× power"), although this can lead to confusion with optical power.
In considering the effect of sensor size, and its effect on the final image, the different magnification required to obtain the same size image for viewing must be accounted for, resulting in an additional scale factor of / where is the relative crop factor, making the overall scale factor / (). Considering the three cases above:
The crop factor is sometimes referred to as "magnification factor", [5] "focal length factor" or "focal length multiplier". [6] This usage reflects the observation that lenses of a given focal length seem to produce greater magnification on crop-factor cameras than they do on full-frame cameras. This is an advantage in, for example, bird ...
When the subject is at the hyperfocal distance or beyond, the far DOF is infinite, so the ratio is 1:∞; as the subject distance decreases, near:far DOF ratio increases, approaching unity at high magnification. For large apertures at typical portrait distances, the ratio is still close to 1:1.
The benefits are reduced file sizes and the ability to calculate the zoom level from the image's dimensions, if not included in its meta data. [citation needed] Cameras may have an intelligent zoom feature that allows an additional magnification of 2.0× on top of its optical zoom. Many cameras have 2 options: 1.4× and 2.0×.
1. Sign in to Desktop Gold. 2. Click the Settings button at the top. 3. Click Mail on the left side. 4. Click the Font and Text tab. 5. Next to Default Read Mail Zoom, select your preferred zoom level from the menu.