Originally posted by Mattox Extending ISO range to 80 I thought it fitting to raise this question in a separate thread after a discussion was raised in landscape photography using my k5. Has anyone tried extending the iso range to 80? Is there a significant different in DR from 100 to 80 with your experience? I find it strange that the camera isn't set at this range in default. Is it a true iso, or does the camera tweak the sensor into a false range. I have heard that the native iso for the k5 is 200, but I have always set the camera at 100 obviously for landscape purposes
I'm pretty sure that the K-5 sensor native ISO is 80. You won't see a difference between ISO 80 and ISO 100 unless you need to pull the darker areas of your images where you might see lightly less noise in the blacks at ISO 80 vs ISO 100. The difference in DR won't be better than 20% ( (100-80)/100 ).