Un­der­stand sen­sor size

Chris Rut­ter ex­plains how the res­o­lu­tion and size of your cam­era’s sen­sor af­fects your shots

NPhoto - - Contents -

Dis­cover the dif­fer­ence your cam­era’s sen­sor size and pixel count has on pho­tos

Sen­sors can be con­fus­ing. What do your cam­era’s megapixel and sen­sor size num­bers ac­tu­ally mean?

‘Megapix­els’ are the num­ber of pix­els (or mil­lions of pix­els) in the im­age – its ‘res­o­lu­tion’, in other words. This roughly tells you how much your im­ages can be en­larged with­out in­di­vid­ual pix­els be­com­ing no­tice­able. It’s reck­oned that for the high­est qual­ity prints, the im­age should be at least 300dpi (dots per inch), and you can check the ta­ble, right, to see the max­i­mum print size at this res­o­lu­tion for a range of dif­fer­ent megapixel rat­ings. There’s no sharp cut-off – you can go larger with­out sud­denly los­ing qual­ity, but this is still a use­ful com­par­i­son.

The phys­i­cal size of the sen­sor af­fects your im­ages (and your lenses) in a dif­fer­ent way. Let us ex­plain… But if you put the same lens on a DX cam­era you cap­ture a smaller area/an­gle of view

A 28mm lens on an FX cam­era gives a wide an­gle of view

28mm lens, FX cam­era To get the same an­gle of view on a DX cam­era, you need an 18mm lens

18mm lens, DX cam­era

Newspapers in English

Newspapers from Australia

© PressReader. All rights reserved.