High ISO can be relative to the camera, subjective to the user or both relative to the camera, subject of interest and subjective to the user.
High ISO can be both relative to both relative to the camera, subject of interest and subjective to the user.
- If you are trying to photograph subjects where you want to see the fine details, than even ISO 2000 can be considered noisy for a D4 yet it is totally acceptable when it comes to shooting footballers challenging for a ball.
- Personally (the keyword) I wont go any higher than ISO 1250 on the D4 if I want to showcase feather details of a bird but it may differ from another photographer who uses the same body.
- For a person who uses a D7100, ISO 2000 would really lie on the high side when it comes to bird photography and as far as I know (as told) its like the "red line" limit where going beyond, the image would be too noisy. Yet, ISO 2000 on the D4 can acceptable albeit not my preference unless it means separating a photo with motion blur or a sharp one.
High ISO can relative to the camera
- Certain subjects require one to limit to certain thresholds of ISO. Examples are like Aurora Borealis where ISO 3200 is well within the native range of the D4, trying to shoot the Aurora Borealis with it probably won't yield the best results. Hence, for such subjects, I would limit it to ISO 1600 for the D800 but that would likely be ISO 2500 on the D4. So it depends on the camera
High ISO can be subjective
- Its all to our preference at times. The definitions on the specifications are as such that if the ISO is beyond the native prescribed ISO range, it is high but some of us would never use ISO beyond a certain range for a certain body out of preference. Personally, I do not use ISO more than 1600 for the D800 unless it is the case of if I get the shot off or totally not getting it at all.
Hi guys, I would like to seek some insight clarification on the above functions. Manual did not mention much. As in how high is considered high ISO? 3200? 6400? Or above? And at what shutter speed consider long? Can I just leave both settings 'ON' all the time?