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Difference between revisions of "Key Camera Specifications Explained"
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Key Camera Specifications Explained (view source)
Revision as of 21:20, 14 September 2023
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*Sensor image size rating (in MP) | *Sensor image size rating (in MP) | ||
*Effective sensor surface area (in um) | *Effective sensor surface area (in um) | ||
*Focal length | |||
*Aperture | |||
*Display size and type | *Display size and type | ||
*Image output format and video recording capability | *Image output format and video recording capability | ||
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<code>''There is absolutely no substitute for having a large number of fixed lenses or a variable one that can cover most requirements. Even complex post-processing does not create the best results. You need to understand what focal length you need for any task, through experience. Lower values are for close-ups, larger one for long distance shots''</code> | <code>''There is absolutely no substitute for having a large number of fixed lenses or a variable one that can cover most requirements. Even complex post-processing does not create the best results. You need to understand what focal length you need for any task, through experience. Lower values are for close-ups, larger one for long distance shots''</code> | ||
== Lenses, Magnification | == Lenses, Focal Length, Magnification, Aperture == | ||
===Introduction to the magnification factor=== | ===Introduction to the magnification factor=== | ||
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<code>''Keep in mind that even if you determine the magnification factor it matters much more what focal length your camera has, as this will determine how well it can focus at a specific distance from your subject.''</code> | <code>''Keep in mind that even if you determine the magnification factor it matters much more what focal length your camera has, as this will determine how well it can focus at a specific distance from your subject.''</code> | ||
=== Aperture === | |||
Knowing how much of your lens surface can be used to let the light pass towards your image sensor is known as the lense's aperture. It is usually indicated through a ratio, usually presented as F/(fractional value) or F(fractional value), where F is the focal length of the lens. The value is either fixed, as is on fixed lens systems that most smartphone cameras have, or variable, as in most lens systems for professional and semi-professional cameras. If two values are present, they are the minimum and maximum values that are available at each ends of the focal length domain. As expected, only cameras that have removable optical systems may have different focal lengths and different apertures, depending on what the manufacturer offers. | |||
Typical apertures are F/2 to F/2.5 for smartphone cameras and F/4 to F/6 for professional cameras. However, as smartphone cameras have focal lengths around 20mm, while professional cameras have 15 to 55mm, it means that a professional camera can typically work much more reliably in different light conditions, as they can adjust to overly bright or dark scenes more easily. | |||
A lense aperture also influences the way in which a subject is focused, as smaller apertures translate in better closeup focusing while larger ones are used to show specific details on a larger subject or for distant shootings. In this context, large apertures are low ratios such as F/2 while small ones are F/16. The small or large designation pertains to how wide the opening for the light is, with F/16 being a very narrow opening and F/2 signalling the widest opening. | |||
<code>''In general you note what specific apertures translate to in your pictures, and note where the best focusing occurs, at a given similar distance. On professional cameras, you evaluate results results similarly, taking into account what influence changing the lens system or focal length has on your subject.''</code> | |||
== Effective Sensor Surface Area == | == Effective Sensor Surface Area == | ||