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Focal Length of Lens given Photo Scale Formula

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Focal Length of Lens is usually represented in millimeters (mm), is the basic description of a photographic lens. Check FAQs

f len = (P \cdot (H - h 1))

f_len - Focal Length of Lens?P - Photo Scale?H - Flying Height of Airplane?h₁ - Elevation of Point?

Focal Length of Lens given Photo Scale Example

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Here is how the Focal Length of Lens given Photo Scale equation looks like with Values.

Here is how the Focal Length of Lens given Photo Scale equation looks like with Units.

Here is how the Focal Length of Lens given Photo Scale equation looks like.

4.2 = (2.1 \cdot (11 - 9))

4.2m = (2.1 \cdot (11m - 9m))

4.2 = (2.1 \cdot (11 - 9))

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Focal Length of Lens given Photo Scale Solution

Follow our step by step solution on how to calculate Focal Length of Lens given Photo Scale?

FIRST Step Consider the formula

f len = (P \cdot (H - h 1))

Next Step Substitute values of Variables

∴

f len = (2.1 \cdot (11m - 9m))

Next Step Prepare to Evaluate

∴

f len = (2.1 \cdot (11 - 9))

LAST Step Evaluate

∴

f len = 4.2m

Focal Length of Lens given Photo Scale Formula Elements

Variables

Focal Length of Lens

Focal Length of Lens is usually represented in millimeters (mm), is the basic description of a photographic lens.

Symbol: f_len

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Focal Length of Lens

Photo Scale

Photo scale is determined by the focal length of the camera and the flying height above the ground.

Symbol: P

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Photo Scale

Flying Height of Airplane

Flying height of airplane above datum (usually mean sea level) is defined as the average flying height above ground.

Symbol: H

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Flying Height of Airplane

Elevation of Point

Elevation of point, line, or area with respect to datum.

Symbol: h₁

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Elevation of Point

Other formulas in Photogrammetry category

Go Photo Scale given Focal Length

P = (\frac{f len}{H - h 1})

Go Flying Height of Airplane above Datum

H = ((\frac{f len}{P}) + h 1)

Go Elevation of Point, Line or Area

h 1 = (H - (\frac{f len}{P}))

How to Evaluate Focal Length of Lens given Photo Scale?

Focal Length of Lens given Photo Scale evaluator uses Focal Length of Lens = (Photo Scale*(Flying Height of Airplane-Elevation of Point)) to evaluate the Focal Length of Lens, The Focal Length of Lens given Photo Scale formula is defined as the distance from the centre of the lens to the principal foci (or focal points) of the lens. Focal Length of Lens is denoted by f_len symbol.

How to evaluate Focal Length of Lens given Photo Scale using this online evaluator? To use this online evaluator for Focal Length of Lens given Photo Scale, enter Photo Scale (P), Flying Height of Airplane (H) & Elevation of Point (h₁) and hit the calculate button.

FAQs on Focal Length of Lens given Photo Scale

What is the formula to find Focal Length of Lens given Photo Scale?

The formula of Focal Length of Lens given Photo Scale is expressed as Focal Length of Lens = (Photo Scale*(Flying Height of Airplane-Elevation of Point)). Here is an example- 4.2 = (2.1*(11-9)).

How to calculate Focal Length of Lens given Photo Scale?

With Photo Scale (P), Flying Height of Airplane (H) & Elevation of Point (h₁) we can find Focal Length of Lens given Photo Scale using the formula - Focal Length of Lens = (Photo Scale*(Flying Height of Airplane-Elevation of Point)).

Can the Focal Length of Lens given Photo Scale be negative?

No, the Focal Length of Lens given Photo Scale, measured in Length cannot be negative.

Which unit is used to measure Focal Length of Lens given Photo Scale?

Focal Length of Lens given Photo Scale is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Focal Length of Lens given Photo Scale can be measured.

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Focal Length of Lens given Photo Scale Formula

Focal Length of Lens given Photo Scale Example

Focal Length of Lens given Photo Scale Solution

Focal Length of Lens given Photo Scale Formula Elements

Other formulas in Photogrammetry category

How to Evaluate Focal Length of Lens given Photo Scale?

FAQs on Focal Length of Lens given Photo Scale

Variable Name