Beginner Lenses

[SsSsSsSsSnake]

I got my first camera in 1984 and the first time I went over ISO 1600 was 2004.

We’re spoiled nowadays, don’t get me wrong I love being able to shoot in natural light where it used to be impossible, but it’s not a necessity

If using AV priority,auto iso, with SS and ISO set to min and Max preferred.Does the camera always prioritise keeping ISO at lowest equiv to SS until the SS hits the lowest setting ? In other words how is it juggled?
Thinking about it,if Ss can’t go any lower to allow longer for more light ISO has to rise.if too sunny then ISO goes to min set and SS increases to let less light in.
I think I’ve answered my own question,?
?? Or does it ever happen for whatever reason that ISO goes up and SS goes up?.
Dark times ISO goes up and SS comes down

 

[Phil V]

If using AV priority,auto iso, with SS and ISO set to min and Max preferred.Does the camera always prioritise keeping ISO at lowest equiv to SS until the SS hits the lowest setting ? In other words how is it juggled?

A quick experiment appears to show that the SS is pretty much anchored to the minimum set until I hit max iso and then the iso stays put and the SS drops.
I’ve not tried the experiment in TV though where it could be a more interesting and complicated story?

Tried it, and it’s not, the camera stops the lens down ‘a bit’ and maintains that as the shutter speed and ISO climb.

I’d like to think that in a range of conditions there would be slightly more complex behaviour. But my simple experiment suggests I might be wrong, and that all the camera does is to mimic someone trying to rigidly stick to their ‘settings’.

 

[SsSsSsSsSnake]

A quick experiment appears to show that the SS is pretty much anchored to the minimum set until I hit max iso and then the iso stays put and the SS drops.
I’ve not tried the experiment in TV though where it could be a more interesting and complicated story?

Tried it, and it’s not, the camera stops the lens down ‘a bit’ and maintains that as the shutter speed and ISO climb.

I’d like to think that in a range of conditions there would be slightly more complex behaviour. But my simple experiment suggests I might be wrong, and that all the camera does is to mimic someone trying to rigidly stick to their ‘settings’.

I’ve edited my original question a bit Phil

 

[SsSsSsSsSnake]

Ok I’m thinking on the TV settings now

 

[SsSsSsSsSnake]

A quick experiment appears to show that the SS is pretty much anchored to the minimum set until I hit max iso and then the iso stays put and the SS drops.
I’ve not tried the experiment in TV though where it could be a more interesting and complicated story?

Tried it, and it’s not, the camera stops the lens down ‘a bit’ and maintains that as the shutter speed and ISO climb.

I’d like to think that in a range of conditions there would be slightly more complex behaviour. But my simple experiment suggests I might be wrong, and that all the camera does is to mimic someone trying to rigidly stick to their ‘settings’.

Phil why would the camera stop down a little in TV mode when SS goes up it less light so wouldn’t it open up a bit to compensate and if not I assume it’s because ISO going up( does the iso do that to correct the exposure),if so why is the aperture getting involved?

 

[Phil V]

Phil why would the camera stop down a little in TV mode when SS goes up it less light so wouldn’t it open up a bit to compensate and if not I assume it’s because ISO going up( does the iso do that to correct the exposure),if so why is the aperture getting involved?

There might have been some movement of SS (or conversely aperture) based on the exposure triangle trying to do the maths and picking a closer aperture or shutter speed, and I feel this might be dependent on whether your camera is set to adjust in 1/3 or 1/2 stops.

I only mentioned the change for full disclosure (and observed in AV), we're talking about (for instance) 1/320 rather than 1/250 - not 1/1000 or similar - finding the nearest available setting.

I think I was giving the camera some work to do, I have a min SS of 1/250 set, and at 2.8 the ISO was far from base. That allowed me to find a wide enough aperture to max the ISO parameter (25600?) and then start to lower the SS.

Again, completely unscientific and there may be some much fuzzier logic available that I strongarmed my way past based on my personal camera parameters.

 

[SsSsSsSsSnake]

There might have been some movement of SS (or conversely aperture) based on the exposure triangle trying to do the maths and picking a closer aperture or shutter speed, and I feel this might be dependent on whether your camera is set to adjust in 1/3 or 1/2 stops.

I only mentioned the change for full disclosure (and observed in AV), we're talking about (for instance) 1/320 rather than 1/250 - not 1/1000 or similar - finding the nearest available setting.

I think I was giving the camera some work to do, I have a min SS of 1/250 set, and at 2.8 the ISO was far from base. That allowed me to find a wide enough aperture to max the ISO parameter (25600?) and then start to lower the SS.

Again, completely unscientific and there may be some much fuzzier logic available that I strongarmed my way past based on my personal camera parameters.

Thankyou