# How is FOV calculated in astrophotography?

## How is FOV calculated in astrophotography?

FOV = ((57.3 / 1040) * 22.3) The long side of the frame has a field of view of 1.23 degrees. Example: A Canon T2i (550D) has a sensor that is 22.3 x 14.9 mm.

## What is a good focal ratio for astrophotography?

Fast f/4 to f/5 focal ratios are generally best for lower power wide field observing and deep space photography. Slow f/11 to f/15 focal ratios are usually better suited to higher power lunar, planetary, and binary star observing and high power photography. Medium f/6 to f/10 focal ratios work well with either.

What is pixel scale in astrophotography?

Pixel Scale. The pixel scale is just 206 * (pixel size) / (focal length). Assuming your 30 mm guide scope is f/4 that would be a focal length of 120mm. Using a common guide camera such as the ASI120MM which has a pixel size of 3.8u, the pixel scale is 206 * 3.8 / 130 = 6.0 arcseconds/pixel.

What is image scale in astrophotography?

What we are describing with the arc sec per pixel figure is the image scale. It’s an amount of sky which will cove one pixel on your cameras sensor. To get a sense of scale the moon is approximately half a degree wide.

### What is field of view in photography?

Field of view (FOV) is the maximum area of a sample that a camera can image. It is related to two things, the focal length of the lens and the sensor size.

### What is the angle of view in photography?

“Angle of view” describes how much of the scene in front of the camera will be captured by the camera’s sensor. In slightly more technical terms, it is the angular extent of the scene captured on the sensor, measured diagonally.

What does f 10 telescope mean?

A telescope’s “f/number” is its “focal ratio”. A scope with a focal LENGTH of 1000mm and an aperture (diameter) of 100mm has a focal ratio of 10, and is designated “f/10” (divide aperture into focal length).

What is the field of view calculator?

This calculator computes the Field of View seen by your camera and lens. Field of View is an angle which depends on the focal length and sensor size, but it also computes dimensional Field of View sizes (width, height, or diagonal fields) at some specific distance, like at the subject distance, or at a background distance.

#### What is the formula for telescope focal length?

Formula: Eyepiece Field of View / ( Telescope Focal Length / Eyepiece Focal Length ) Eyepiece Field of View: Eyepiece Focal Length: mm Telescope Focal Length:

#### What does FOV mean in astrophotography?

Astrophotography Field of View Labs. Field of View (FOV) determines how big the object being photographed is in the image.

What is the equation for linear field of view?

Linear field of view = 2 (Tan (Angle of view/2) X Distance to Subject) Common Focal Lengths and Their Corresponding FOVs Since the equation for field of view contains the sensor width, which determines the crop factor of a lens, this is another way to see the effect that the crop factor of a camera has on an image.

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