Beginner photographer, made myself a cheat sheet card I was going to keep with my camera for reference. Does this make sense? (See comment)

This isn't true. Noise has nothing to do with aperture or shutter speed. Noise is directly caused by ISO raising the sensitivity of the digital sensor.

Higher ISO allows the sensor to capture more light because it becomes more sensitive, but this also directly causes more noise, as well as less color accuracy and less fine detail recorded on the sensor.

Shutter speed and Aperture are both physical ways to obstruct and limit light in controlled ways. They don't affect the digital noise from the sensor in any way.

If you want to consistently get the sharpest and most color accurate photos possible, you should leave the ISO on the lowest setting possible with the current lighting conditions. If there's not enough light, you should first consider adjusting shutter speed or aperture, because raising ISO will have a direct negative impact to image quality.

Lowering Aperture just means you have a narrower focal plane to hit, but it's still possible to get a perfect quality photo. Using a slower shutter speed means you need to have a steady hand or a tripod, and you can get a perfect quality photo. There's no compensating for the effects of high ISO: digital noise, loss of color accuracy, and blurriness.

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