Is the 160,320,640,1250ISO optimum in the GH1 too?

PappasArts

PappasArts

Veteran
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I never did tests but I just shot a piece at 1000 iso, 50mm f2.0 and it looked alright.
I will post it soonish.
 
Huh? I just got this camera three days ago, but I only see 100, 200, 400, 800, 1600, and 3200.

Guess I better pull out the manual. :huh:
 
Just made the same shot in ISO 100, 125, and 160. ISO 100 and 125 looked very close: hard to call. ISO 160 definitely had a little more noise. So I'm not sure this "native ISO" thing is anything more than a myth at this point. If I get some time I'll test more (higher) ISO's.

Mike
 
Finster -- you can expand the ISO increments as follows:

Menu/set button >> use Up/down arrows to choose Rec >> accept Rec with the Right arrow >> use Up/down arrows to choose ISO increments >> accept it with the Right arrow >> use Up/down arrows to choose 1/3 EV >> Menu/set button to accept and exit menu.

I thought (could be wrong) that it can only be set in a still camera mode, but once set, is available to Creative movie mode.

J Davis -- look forward to seeing your 1000 ISO test: when I shoot natural light interior, ISO 500 or 640 seems to be the maximum I can use without bad grain. Maybe I'm doing something wrong...
 
TrueIndigo said:
Menu/set button >> use Up/down arrows to choose Rec >> accept Rec with the Right arrow >> use Up/down arrows to choose ISO increments >> accept it with the Right arrow >> use Up/down arrows to choose 1/3 EV >> Menu/set button to accept and exit menu.
Click to expand...

No wonder. I kept trying to find it while in movie mode. Thanks! :thumbup:
 
The way I discovered the other ISO settings was to leave movie mode and go into stills 'M' next one over on the dial. Simply press ISO button (up arrow).
I switched to a new ISO and then noticed it held true when I went back to manual Movie Mode. Even after turning the camera on and off
all my extra new options remained in movie mode. Its like a hidden switch had been flipped.

TrueIndigo said:
J Davis -- look forward to seeing your 1000 ISO test: when I shoot natural light interior, ISO 500 or 640 seems to be the maximum I can use without bad grain. Maybe I'm doing something wrong...
Click to expand...

Thanks you for your interest!
BTW – not a test, its a dramatic piece very similar to IRAQ VETERAN (see link in my signiture)
Currently in discussion about which is the best out of 18 takes and CC not started yet.
I won't be posting the original footage tho, only the final piece. Its 1080 res down to 720 so really its for getting an idea about what can be done, not for pixel peeping.
 
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I just did a test with the lens cap on, and it does seem to be a myth unfortunately. I don't think there is a such a thing as a native ISO on the GH1, and I think 'native ISO' is only applicable to dedicated video cameras.

Noise had a relatively linear increase from ISO 500 onwards. ISO 800 was noticeably less noisy than 1000. I increased in the 1/3ev steps all the way from ISO 100 to 1600.
 
There should be at least one iso settng that's a lot less destructive than all the others and it should be around 320 or 400. The only dedicated video camera that's got iso adjustments at this time is RED. Mkii works the same way.

It may just be a matter of figuring out how to test properly, if that's in still or video mode and if it's under certain conditions.

Illya said he got clean images at 400. Perhaps the gh1 is there which sounds like 100, 200, 400, 800
 
commanderspike said:
I just did a test with the lens cap on, and it does seem to be a myth unfortunately. I don't think there is a such a thing as a native ISO on the GH1, and I think 'native ISO' is only applicable to dedicated video cameras.

Noise had a relatively linear increase from ISO 500 onwards. ISO 800 was noticeably less noisy than 1000. I increased in the 1/3ev steps all the way from ISO 100 to 1600.
Click to expand...




Did you raise the black levels for analysis on the final video file in computer?

If not; You need raise that up to nearly to the ceiling for that. Yeah it looks like crap on playback. However testing the ( S/N ratio ) noise; this is how the analysis is done. If there is noise, this would affect the encoder differently.... Curios!


.
 
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J Davis said:
The way I discovered the other ISO settings was to leave movie mode and go into stills 'M' next one over on the dial. Simply press ISO button (up arrow).
I switched to a new ISO and then noticed it held true when I went back to manual Movie Mode. Even after turning the camera on and off
all my extra new options remained in movie mode. Its like a hidden switch had been flipped.
Click to expand...


Just as an FYI for those who haven't got a GH1 in front of them.
The ISO options in movie mode after doing what I did are

100, 125, 160, 200, 250, 320, 400, 500, 640, 800, 1000, 1250, 1600
 
J Davis said:
The way I discovered the other ISO settings was to leave movie mode and go into stills 'M' next one over on the dial. Simply press ISO button (up arrow).
I switched to a new ISO and then noticed it held true when I went back to manual Movie Mode. Even after turning the camera on and off
all my extra new options remained in movie mode. Its like a hidden switch had been flipped.
Click to expand...


I'm trying the same thing, when I go in the M mode there is ISO available till 3200(where as in Creative Movie Mode the max is 1600). I select the 3200 ISO in M mode and when I return to Creative Mode the ISO jumps back to 1600 and still no new list of ISOs such as 125, 160, 250, 320, 640, 1250.

The firmware version is 1.1 and its PAL.
 
BhambuNath said:
I'm trying the same thing, when I go in the M mode there is ISO available till 3200(where as in Creative Movie Mode the max is 1600). I select the 3200 ISO in M mode and when I return to Creative Mode the ISO jumps back to 1600 and still no new list of ISOs such as 125, 160, 250, 320, 640, 1250.

The firmware version is 1.1 and its PAL.
Click to expand...

3200 isn't available in movie mode anyway. Try switching to something like 125 or 160 then switch back and see what happens.
 
J Davis said:
3200 isn't available in movie mode anyway. Try switching to something like 125 or 160 then switch back and see what happens.
Click to expand...


The only ISO settings I see in the M mode are 100,200,400,800,1600,3200.

There are no such settings as 125, 160 etc when I select the ISO button.

Thanks.
 
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