# How to calculate the hyperfocal of a lens?

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### How to calculate the hyperfocal of a lens?

The formula of **calculation of** the distance **hyperfocal** is: H = (F * F) / (f * d), where F is the focal length of the**purpose**f the aperture of the diaphragm and d the diameter of the circle of confusion.

### What is the unit of magnification?

the **magnification** γ **is** the ratio of the sizes of the object AB and its image A’B’: , with AB and A’B’ in meters and γ without **unity**.

### What is the approximate angular value of the circle of confusion of the human eye?

In practice, since optimal conditions are rarely met, a **value** 0.1mm **is** more generally accepted. This corresponds to an alternation of 0.2 mm (white/black), i.e. five cycles per millimeter on a target alternating white and black line.

### How to calculate the value of P?

The p-value is determined based on the test statistic calculated from the sample, the assumed distribution, and the type of test performed (two-tailed or one-tailed). Consider the following terms: P -> the probability that the random variable falls within an interval of values

### How to calculate the degree of freedom?

The formula for degrees of freedom is: Degrees of freedom = n-1, where “n” denotes the number of categories or variables analyzed in our experiment. Example: Two categories of results are observed during our experiment: one for red cars and one for blue cars.

### How to calculate the population mean?

The assumption that a population mean μ1 is equal to the mean of another population μ2 To make a decision, choose the level of significance α (alpha), before the test: If p is greater than α, do not reject H0 (in principle, you never accept the H0 hypothesis, but you just don’t reject it)

### How to calculate the data?

The formula is as follows: χ2 = Σ((oe)2/e), where “o” corresponds to observed or actual data while “e” corresponds to expected or theoretical data. Add the results of this formula for all possible outcomes (see below).