• General Chit Chat

  ISO

  Posted by Kundu Dr Arnab on March 14, 2024 at 10:26 am

  How does ISO work in a digital camera? What’s the mechanism? Aperture I understand increasing the diameter light enters more. With a first shutter speed light remaining on the screen is less, I know increasing ISO light enters more on the sensor but I am confused about how does it happen. Before in film rolls ISO was fixed and accordingly ISO was set ( Nikon FM 10) now I have upgraded to Z8 with a vast range of ISO. Please help me to understand.

  Shirish Mhatre replied 8 months, 1 week ago 3 Members · 2 Replies
• 2 Replies

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  MANOJ SAI YERRAJARLA

  Member

  March 14, 2024 at 10:59 am

  Iso is mainly depends on cropsenser Or fullframe. Fullframe sensor contains large area of photosite ,in which more photons are present more than noise.more photons >> more light sensitivity.less noise

  • This reply was modified 8 months, 2 weeks ago by  MANOJ SAI YERRAJARLA.
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  Shirish Mhatre

  Member

  March 17, 2024 at 2:04 pm

  It is nothing but amplification of the signal, received by the sensor (e.g. by CMOS or CCD) by electronic means. At 100 ISO, the amplification is 0, subsequently the amplification increases in proportion with the value, you set. E.g. at 800 ISO, the amplification of the signal, received by the sensor is 8 times.

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