As a general rule, as the angle of view gets wider (and the number becomes larger), your focal length gets shorter and you can fit more into the frame. Use the handy cheat sheet above to see this all for yourself. And make sure to keep us bookmarked for more great photography cheat...
Therefore, optics are used to bend light in a way that moves the nodal point forward away from the sensor, making the focal length distance purely theoretical. This is why, in modern photography, a listed focal length is merely used to indicate that lens’ angle of view when focused at in...
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 ...
Everything I've explained is pretty straightforward. It's how lenses have been categorised for decades. -- hide signature -- Instagram: @yardcoyote Reply Reply with quote Reply to thread Complain robgendreau • Forum Pro • Posts: 11,751 Re: Thoughts on the focal length 85mm? (Not...
In order to illustrate the focal length range or the flexibility of a lens, the ratio of smallest to largest focal length has become common in photography. An optical system with 25 to 100 millimeters has a fourfold optical zoom - or had, in this present age. ...
A single focal length lens includes an aperture stop and first through fourth lens units having, respectively, negative refractive power, positive refractive power, negative refract
To provide a variable-focal length lens capable of altering its focal length at high speed. The variable-focal length lens has an electrooptic material and electrodes formed on an i
subwoofer laid out, perhaps, on a table or entertainment console below using a longer length of speaker wire. For some, the subwoofer is even slim enough that it could be placed under a couch, though you’ll need a good length of speaker wire for that, and hiding it may take some ...
substantially the same length and each includes at one end thereof an inclined surface 252 and 254, respectively, which is adapted to be engaged, simultaneously, by the pin 212 so as to pivot the elongate member 232 and the arm 250 in a clockwise manner, as view in FIGS. 4 and 12. ...
If you’ve spent any amount of time watching videos and reading articles about photography, you’ll almost certainly have heard or seen others talk aboutzoom and prime lenses. A prime lens has a fixed focal length, whereas zoom lenses let you increase or decrease this within a specified range...