Noun:

ফোকাস দৈর্ঘ্য,

focal length শব্দের বাংলা অর্থ এর উদাহরণ:

প্রতিফলকের সমীকরণ হলো 4 F D = R 2 , {\displaystyle 4FD=R^{2},} যেখানে F হলো ফোকাস দৈর্ঘ্য, D হলো প্রতিফলোকের গভীরতা এবং R হলো ব্যাসার্ধ ।

ধরনের দূরবিন দিয়ে ভালো বিবর্ধণ পাওয়া গেলেও ভালো বিম্বের জন্য অভিলক্ষ্যের এফ-অনুপাত (লেন্সের ফোকাস দৈর্ঘ্য ও কার্যকর ব্যাসের অনুপাত) অনেক বেশি হতে হয় ।

focal length's Usage Examples:

The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power.

of lens elements for which the focal length (and thus angle of view) can be varied, as opposed to a fixed focal length (FFL) lens (see prime lens).

In photography, the 35 mm equivalent focal length is a measure that indicates the angle of view of a particular combination of a camera lens and film or.

long-focus lens in which the physical length of the lens is shorter than the focal length.

In film and photography, a prime lens is a fixed focal length photographic lens (as opposed to a zoom lens), typically with a maximum aperture from f2.

cinematography, a wide-angle lens refers to a lens whose focal length is substantially smaller than the focal length of a normal lens for a given film plane.

A first step is to put a simple convex lens at the pinhole with a focal length equal to the distance to the film plane (assuming the camera will take.

The effective focal length is nearly equal to the stated focal length of the lens (F), except in macro photography where.

In digital photography, the crop factor, format factor, or focal length multiplier of an image sensor format is the ratio of the dimensions of a camera's.

an optical system such as a camera lens is the ratio of the system's focal length to the diameter of the entrance pupil ("clear aperture").

More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that.

The depth of field can be calculated based on focal length, distance to subject, the acceptable circle of confusion size, and aperture.

Since the focal length of a lens depends on the refractive index, this variation in refractive.

differs significantly from what the object would look like with a normal focal length, due to the relative scale of nearby and distant features.

The amount of magnification depends on the focal length of the eyepiece.

telescopes focal length f {\displaystyle f} divided by the eyepiece focal length f e {\displaystyle f_{e}} (or diameter).

The maximum is limited by the focal length.

The geometry of a lens hood is dependent on three parameters: the focal length of the lens, the size of the front lens element and the dimensions of.

results in a slightly different angle of view from lenses at the same focal length and overall a much narrower angle of view compared to 35 mm film.

distance from this point to the lens is the focal length, though it is negative with respect to the focal length of a converging lens.

of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in metres.

Synonyms:

focal distance; distance;

Antonyms:

nearness; near; farness;