|
Forum: Photographic Technique
08-03-2021, 09:45 PM
|
| |
Here are 2 sensors one is isoless and the other is not isoless
As you can see that the D5 produces more noise at iso 100 than at iso 10000 and after iso 10000 it becomes isoless (is0 invariant)
So If I am shoot the camera at with an exposure that does not saturate the sensor the best for a given iso I am letting the camera produce more noise because of that lower iso, now if I am shooting the camera at an iso that puts the saturation near to top of the clipping point than the camera will produce less noise.
Here is the D5 shot using the same exposure while lifting the shadows in post
As you can see the camera produces more noise at iso 100
Now if we look at a sensor that is isoless like K1
If I shoot the camera at iso 200 and lift the shadows in post there is very little difference to just shooting the camera iso 6400 other than protecting the highlight if you are close to clipping them when shooting at the lower iso setting.
Now going back to the D5, If my interest is to decrease noise for a given exposure I should be setting my metering system so that it using the sensor based on how it saturates the raw file for the iso setting and its clipping point.
With cameras like the D4 and D5 there is built in headroom that is used within the raw files so for the Nikon camera you can use iso 1600 when the camera tell you to use iso 800.
If you look at the graph above you can see that there is a decrease in noise as you increase your iso to 1600. So if I am not clipping my raw file at iso 1600 when the camera tells me to use iso 800 I can further reduce the noise the camera produces.
|
|
Forum: Monthly Photo Contests
12-14-2020, 01:11 PM
|
| |
Any time, if I like it! :)
|
|
Forum: Pentax K-1 & K-1 II
03-05-2019, 06:59 PM
|
| |
HD Pentax-D FA 24-70mm F2.8 ED SDM WR is the FF equivalent in angle of view to the 16-50 with is a APS-C lens.
There is NO manufactureererer , Nikon, Canon, Sigma, Tokina that offers a Full Frame Lens, from ultra wide to standard focal length, the possible closest would be the Canon EF 17-40mm F4.
|
