gf1 Auto ISO with Shutter priority and Manual lens

kahren · Feb 22, 2011

so if you put the camera in Shutter priority mode, and use Auto ISO with a fully manual lens it won't adjust iso? considering i pick whatever shutter speed i want? or am i doing something wrong? mine is stuck on iso 100

Howi · Feb 23, 2011

kahren said: ↑

so if you put the camera in Shutter priority mode, and use Auto ISO with a fully manual lens it won't adjust iso? considering i pick whatever shutter speed i want? or am i doing something wrong? mine is stuck on iso 100
Click to expand...

Hi kahren, It's because the camera cannot tell what aperture you have set and therefore cannot set the ISO.

shutter speed + aperture + ISO = exposure setting
all three are inter related, if one is missing, the relationship is broken.
just set the ISO manually.

~tc~ · Feb 23, 2011

Or use A mode or P mode with program shift

Wasabi Bob · Feb 23, 2011

Which lens

kahren said: ↑

so if you put the camera in Shutter priority mode, and use Auto ISO with a fully manual lens it won't adjust iso? considering i pick whatever shutter speed i want? or am i doing something wrong? mine is stuck on iso 100
Click to expand...

So what lens are you using? Is it a lens you've adapted using an aftermarket converter? In order for the feature to work, the camera needs to communicate with the lens.

nseika · Feb 23, 2011

Howi said: ↑

Hi kahren, It's because the camera cannot tell what aperture you have set and therefore cannot set the ISO.

shutter speed + aperture + ISO = exposure setting
all three are inter related, if one is missing, the relationship is broken.
just set the ISO manually.
Click to expand...

Considering that it can be done, that would be the manufacturer's choice or how they calculate the light

https://www.mu-43.com/f43/why-auto-iso-not-available-m-mode-9178/

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gf1 Auto ISO with Shutter priority and Manual lens

kahren Mu-43 Veteran Subscribing Member

Howi Mu-43 Veteran

~tc~ Mu-43 Hall of Famer

Wasabi Bob Mu-43 All-Pro

nseika Mu-43 Veteran