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Gemstones, Minerals & Fossils
Gemstones and Minerals
Gemstone Photography - Technical Topic
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<blockquote data-quote="Dihusky" data-source="post: 455635" data-attributes="member: 10304"><p>To answer that in the simplest fashion, it's function of the diagonal of the image plane inside the camera. This then illustrates how wide the image the lens can capture, 18mm is wide angle (depending on the imager), 55mm always used to be considered close to a standard lens in 35mm film days. In digital cameras the imager size is all important.</p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/10304/1543472105_2000px-sensor_sizes_overlaid_inside_-_updated.svg.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>To put a specific size on these a full frame 35mm measures 36 x 24mm, lens focal lengths are based on the diagonal, so the diagonal of the 35mm full frame is 43mm which is why the 50mm lens is considered a 'standard lens', it's close to a 1:1 ratio.</p><p></p><p>My camera is a 4/3rds and is one in the M4/3 range of cameras, they have a universal mounting system for lenses which opens out a heap of options with different brands, prices and qualities.</p><p></p><p>For macro work see if you can get an extension tube, they are a cheap solution to creating a macro lens.</p></blockquote><p></p>
[QUOTE="Dihusky, post: 455635, member: 10304"] To answer that in the simplest fashion, it's function of the diagonal of the image plane inside the camera. This then illustrates how wide the image the lens can capture, 18mm is wide angle (depending on the imager), 55mm always used to be considered close to a standard lens in 35mm film days. In digital cameras the imager size is all important. [img]https://www.prospectingaustralia.com/forum/img/member-images/10304/1543472105_2000px-sensor_sizes_overlaid_inside_-_updated.svg.jpg[/img] To put a specific size on these a full frame 35mm measures 36 x 24mm, lens focal lengths are based on the diagonal, so the diagonal of the 35mm full frame is 43mm which is why the 50mm lens is considered a 'standard lens', it's close to a 1:1 ratio. My camera is a 4/3rds and is one in the M4/3 range of cameras, they have a universal mounting system for lenses which opens out a heap of options with different brands, prices and qualities. For macro work see if you can get an extension tube, they are a cheap solution to creating a macro lens. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Gemstone Photography - Technical Topic
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