GX7 - ISO greater than 3200 in video....maybe

[Tiwiliger80]

If this is common knowledge, I apologise for wasting everyone's time....and if I am wrong completely...well then once again I apologise....this is something I just noticed and thought to share with others if they have no knowledge of it as I didn't.

Set your camera in any of the movie modes where exposure compensation is available (best example to try is movie/s) and set your shutter speed and iso so that they are static (e.g. SS 100 and ISO 3200). Assuming you are in a dark environment, your aperture should be wide open, your shutter speed is set as is your iso so exposure compensation should have no effect which it does not........until you pass EV+2 where for the next 3 stops to EV+3 the exposure does in fact change which I can only assume is the sensor changing to iso 6400, 12800 and 25600 which is the sensor limit.

I assume this is the low light mode mentioned only once in the camera manual if you take video with any of the night scene guides active but having more control over the exposure variables in the other movie modes makes it a more viable option. The image is a noisy mess at those settings but for any situation where any image would be better than darkness, it could be handy.

 

[Ontario Gone]

You are correct, i actually had a thread on this a good while ago where i posted some frame grabs showing this. Everybody at the time was claiming 3200 was the max, nobody seemed to know about this. Useful if you have to have the extra "light" as 12k is pretty high. All in all the GX7 is a fairly good little video cam.

 

[shamhead]

Good to know this, very useful, just tested on the GM1 and the same applies. Pity Exposure Compensation is not available in Manual mode, so you can't get into those high iso values in full M mode.

 

[neil holmes]

If this is common knowledge, I apologise for wasting everyone's time....and if I am wrong completely...well then once again I apologise....this is something I just noticed and thought to share with others if they have no knowledge of it as I didn't.

Set your camera in any of the movie modes where exposure compensation is available (best example to try is movie/s) and set your shutter speed and iso so that they are static (e.g. SS 100 and ISO 3200). Assuming you are in a dark environment, your aperture should be wide open, your shutter speed is set as is your iso so exposure compensation should have no effect which it does not........until you pass EV+2 where for the next 3 stops to EV+3 the exposure does in fact change which I can only assume is the sensor changing to iso 6400, 12800 and 25600 which is the sensor limit.

I assume this is the low light mode mentioned only once in the camera manual if you take video with any of the night scene guides active but having more control over the exposure variables in the other movie modes makes it a more viable option. The image is a noisy mess at those settings but for any situation where any image would be better than darkness, it could be handy.

Yes you can but it is not pretty.

If you don't have any other way I suppose if you must use it.

There is a reason they put ISO 3200 as maximum in the GX7.

 

[Advent1sam]

Neil,

This was so on the gh2 too, the thing is the gh2 was hacked to oblivion and all these things got included in the patches so work around's like this became forgotten about. Like you say, it becomes a bit grainy, but in black and white becomes quite nice effect