[FONT="]Hi all,[/FONT]
[FONT="]many people including me have commented how weird auto iso works with flash on nikon bodies (I have a d750).[/FONT]
[FONT="]The ideal implementation would be the camera to get a similar to an ambient exposure and then use the flash (typically I have it dialed down) to only give a slight fill.[/FONT]
[FONT="]My experience says though that with auto iso you are not sure what the camera would finally do. I have found many times that camera would use basic iso trying to illuminate the scene on flash and others use it only as a week fill light.[/FONT]
[FONT="]
[/FONT]
[FONT="]The reason I made this post is that I have noticed something that I would like to share with you, that looks to be the way to prebias the system on what to do.[/FONT]
[FONT="]When my camera is set to AUTO ISO and below it gives the number of 100 then my shot would be shot at iso 100 and the flash would only try to light the whole scene.[/FONT]
[FONT="]In cases though that I am at AUTO ISO and below it gives the number of 1600 (Typical iso for enough indoor ambient light to register) I would get a much more balanced exposure.
[/FONT]
[FONT="]For what I am trying to say here I have not found enough time to extensively test it but to me it looks like that when you are at AUTO ISO with a flash unit the iso value below (the word AUTO) somehow gives a bias to the system what to do with the ambient exposure.
[/FONT]
[FONT="]This is not how camera works in AUTO ISO when there is no flash.[/FONT]
[FONT="]Have you found the same thing? Try it shoot a scene (indoor) at AUTO ISO 100 and set flash at +0 TTL. Then pick AUTO ISO 1600 with flash at +0 TTL.[/FONT]
[FONT="]How these two look like to you?[/FONT]
[FONT="]
[/FONT]
[FONT="]I would like to thank you for your time[/FONT]
[FONT="]Regards[/FONT]
[FONT="]Alex[/FONT]
[FONT="]many people including me have commented how weird auto iso works with flash on nikon bodies (I have a d750).[/FONT]
[FONT="]The ideal implementation would be the camera to get a similar to an ambient exposure and then use the flash (typically I have it dialed down) to only give a slight fill.[/FONT]
[FONT="]My experience says though that with auto iso you are not sure what the camera would finally do. I have found many times that camera would use basic iso trying to illuminate the scene on flash and others use it only as a week fill light.[/FONT]
[FONT="]
[/FONT]
[FONT="]The reason I made this post is that I have noticed something that I would like to share with you, that looks to be the way to prebias the system on what to do.[/FONT]
[FONT="]When my camera is set to AUTO ISO and below it gives the number of 100 then my shot would be shot at iso 100 and the flash would only try to light the whole scene.[/FONT]
[FONT="]In cases though that I am at AUTO ISO and below it gives the number of 1600 (Typical iso for enough indoor ambient light to register) I would get a much more balanced exposure.
[/FONT]
[FONT="]For what I am trying to say here I have not found enough time to extensively test it but to me it looks like that when you are at AUTO ISO with a flash unit the iso value below (the word AUTO) somehow gives a bias to the system what to do with the ambient exposure.
[/FONT]
[FONT="]This is not how camera works in AUTO ISO when there is no flash.[/FONT]
[FONT="]Have you found the same thing? Try it shoot a scene (indoor) at AUTO ISO 100 and set flash at +0 TTL. Then pick AUTO ISO 1600 with flash at +0 TTL.[/FONT]
[FONT="]How these two look like to you?[/FONT]
[FONT="]
[/FONT]
[FONT="]I would like to thank you for your time[/FONT]
[FONT="]Regards[/FONT]
[FONT="]Alex[/FONT]