Quote Originally Posted by filmguy123 View Post
Every time you double or half the ISO it’s a stop. All I meant by stop Down was reduce exposure by a stop - in this particular case I used that term to reference reducing your ISO.

Regarding how to set your ISO to 1500, just set it. All choosing “auto” under the dual native ISO setting does is let the camera choose the optimal internal processing for any ISO that you manually choose. That’s it. You still control the iso manually, the camera just automatically selects HOW it will process your chosen setting to ensure it looks best.
Thank you very much for your patience and expertise. I am grateful.