High ISO Noise (DX Sensor)

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EarthMurmurs Regular Member • Posts: 471
High ISO Noise (DX Sensor)

Hi everyone,

I shoot with a Nikon D7500, which is a cropped sensor camera. I tend to have a bit of 'ISO phobia' but mostly shoot still subjects with a tripod, so ISO 100 is mostly fine. However when I do increase the ISO, even by a little, I always get quite a bit of noise/grain.

The attached image, in it's original state (RAW converted to JPG on the computer, no additional processing) illustrates the noise at a mere ISO 320, 1/200, f9

I'm keen on trying more insect photography, hopefully at f16, but that will mean an even higher ISO and... more noise. Not sure where to go from here... is this a symptom of DX sensors ? My camera allows for over ISO 50,000, which seems pointless if I'm getting these results at ISO 320

FYI this image was shot through a budget 18-55 kit lens. That said, I also use a Nikkor 60mm macro, which results in similar noise issues

Any tips or suggestions would be appreciated on how I can approach this type of photo in the future ?

Original size:

Cropped:

Nikon D7500
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