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For those that don’t know. DSLR or Digital Single Lens Reflex. When you look through the viewfinder your looking through the lens due to a mirror and a prism

For those that don’t know. DSLR or Digital Single Lens Reflex. When you look through the viewfinder your looking through the lens due to a mirror and a prism that sits on top of the camera. When you take a picture the mirror flips out of the way and the image goes straight onto the film/sensor (after the shutter opens for a precise amount of time). There was some interesting tricks with light path to the the autofocus sensor. The prism is great because it un reverses the image. https://en.m.wikipedia.org/wiki/Digital_single-lens_reflex_camera https://en.m.wikipedia.org/wiki/Digital_single-lens_reflex_c... Because of digital you can read the sensor and now show the image in a small screen in the viewfinder instead.

rythie 6y ago
The ones Sony have discontinued recently, actually have a fixed mirror, known as SLT (though they can also be still called DSLRs).
brudgers 6y ago
Typical SLR cameras use a pentaprism which reverses both top and bottom and left and right optical paths to orient the image in the viewfinder to match the orientation we experience without it. However, single lens reflex cameras without a pentaprism are not unknown. [1] They typically correct top-bottom orientation leaving left-right reversed. They are simpler, needing only a single mirrored surface. Most twin-lens reflex cameras also operate this way. Though SLR designs became popular, rangefinder cameras avoid a great deal of the complexity and bulk of SLR designs at the potential expense of parallax issues. On the positive side, a rangefinder camera will typically allow seeing elements outside of the film area and tend to be more compact. One reason for Lecia cameras popularity. [1]: The Graflex reflex cameras are an example, http://camera-wiki.org/wiki/Graflex_reflex_models http://camera-wiki.org/wiki/Graflex_reflex_models

rythie 6y ago

The ones Sony have discontinued recently, actually have a fixed mirror, known as SLT (though they can also be still called DSLRs).

brudgers 6y ago

Typical SLR cameras use a pentaprism which reverses both top and bottom and left and right optical paths to orient the image in the viewfinder to match the orientation we experience without it. However, single lens reflex cameras without a pentaprism are not unknown. [1] They typically correct top-bottom orientation leaving left-right reversed. They are simpler, needing only a single mirrored surface. Most twin-lens reflex cameras also operate this way. Though SLR designs became popular, rangefinder cameras avoid a great deal of the complexity and bulk of SLR designs at the potential expense of parallax issues. On the positive side, a rangefinder camera will typically allow seeing elements outside of the film area and tend to be more compact. One reason for Lecia cameras popularity. [1]: The Graflex reflex cameras are an example, http://camera-wiki.org/wiki/Graflex_reflex_models http://camera-wiki.org/wiki/Graflex_reflex_models