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As an adjunct to the Tangents blog, the intention with this forum is to answer any questions, and allow a diverse discussion of topics related photography. With that, see it as an open invitation to just climb in and start threads and to respond to any threads.
What cameras are ISO Invariant?
Hi
The buzz for a while is the ISO-less approach to photography. I'm intrigued. I'm a Canon shooter so it hasn't applied to me !!
I'm contemplating getting the Sony AR7 II because it will allow me to use ISO-less techniques while using my current Canon lenses. Does anyone have a view on whether this lens with Sony idea is a good solution or not? I'm not keen on the Sony glass offerings at the moment
The other idea is the Fuji X system. Are these really ISO Invariant or not? does anyone know about these things because I've read contradictory reports online. I know Neil did a review of a Fuji a while back but I don't believe he looked at this aspect of it's function. I'd be grateful for any help you could give me.
Thank you for your help
Comments
Good read:
I just don't see the point, I mean if you seeing an almost black screen on LCD, that would scare the bejeebers outta me, so why not just get it right in the first bloody place.
This is the first time I’ve heard of ISO invariant, it sound
like you’re under exposing the image, exposing to the left limiting the amount
of information the sensor is taking in.
Isn’t it better to expose for the high lights, expose to the right and let
the sensor take in as much information as possible?
allowing you to capture shots hitherto impossible by exposing for the
highlights thus preserving them from blowing out and then raising the
shadows to an acceptable lever. ... Changing the ISO wouldn't do this because you'd blow the highlights."
Refer to what Neil just said. Setting ISO is part of the equation for a correct exposure.
From my limited reading of the topic, the idea is that for "ISO invariant sensors" adjusting ISO in camera is really no different (and possibly worse) than always shooting at base ISO and adjusting exposure in post later.
Even if it were true, it would be incredibly inconvenient to shoot like this. Even something as simple as reviewing the photo on the LCD, checking a histogram, even determining appropriate shutter speeds and apertures in the first place could be difficult if you were always shooting at base ISO and adjusting later.
So this topic makes very little sense to me and I wouldn't base a camera purchase decision around it. My $0.02 only though.