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Reproduction ratio 1:1

Started 3 months ago | Discussions thread
fzrTom Senior Member • Posts: 2,333
Re: Reproduction ratio 1:1
2

Hello Gilbert,

1. Reproduction ratio

reproduction ratio means the size you got on the sensor vs the real size of the subject. With 1:1 it means the same. So if you try to make a photo of an insect that measures 10mm of lenght it will have the same measure on your sensor (10mm).

2. How to get it

How to get the 1:1 ratio ? You must be at the min focus distance from the subject. If you do photo not at the min distance you will not get the 1:1 ratio, but a lower ratio. So to sum up, using a macro lens from far way of the subject is ... useless !

3. Size on the screen with a 24Mp FF camera

I understand you have a Z6, so let me explain you what will be the result.

  • Your camera is a FF : 24mmx36mm
  • its resolution is :4000x6000 pixels
  • that mean a linear resolution of : 6000 pixels/36mm = 167 pixels/mm

So if you do a photo of a subject that measure 10mm at min focus distance, on the sensor it will measure 10mm too and it will be : 10mm*167pixels/mm = 1670 pixels on the screen. On a fullHD screen (1920 pixels wide) it's almost the size of the screen.

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Franck

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