Jay Bratcher
April 21st, 2010, 07:25 AM
Hi -
I have recently noticed something unusual with my GH1, and I'm curious if anyone else is seeing this...
First, my camera settings - I am in FHD movie mode, ISO = any (tested at ISO 100 and ISO 1600), Manual or Shutter priority mode (both exhibit this behavior), Nikon AI lens attached via Fotodiox adapter. Shutter speed is set to 1/50 (other shutter speeds do the same thing though), and the iexposure thing can be at any setting (I have it off right now). Gain - when in shutter priority mode - can be at any setting. Film mode is set to My film, which is contrast -2, saturation 0, color 0, and NR +2 (film mode doesn't seem to have any bearing though).
The behavior: If I point the camera at something dark - say, a poorly lit part of the room, then point the camera at a brighter portion of the room - say, a light, or a monitor - the camera seems to increase the gain. At first I thought nothing of this - I thought the camera was adjusting the LCD as it does in still photo mode. But then I realized that if I lock the exposure, the camera is more sensitive when I point back to a dimmer scene.
So last night, I did a quick test in my living room. I had the lights off, but had ambient light from an adjacent room (it was fairly dark). I set the ISO to 1600, set shutter priority mode, cranked the gain all the way up, then checked to see if I was still getting this behavior. Sure enough, if I pointed at the light in the next room, the camera would gain up. I locked the exposure while pointed at the light, then panned around the dark living room. The clip I got was by far the brightest image I have seen out of this camera.
The downside of course, is that it seems I don't really have as much control over the camera as I thought - it is bumping up gain when I am not expecting it ( and the wrong way it seems - why would gain increase when I point the camera at a light?). Of course, locking exposure seems to prevent it from changing, but still...
I have recently noticed something unusual with my GH1, and I'm curious if anyone else is seeing this...
First, my camera settings - I am in FHD movie mode, ISO = any (tested at ISO 100 and ISO 1600), Manual or Shutter priority mode (both exhibit this behavior), Nikon AI lens attached via Fotodiox adapter. Shutter speed is set to 1/50 (other shutter speeds do the same thing though), and the iexposure thing can be at any setting (I have it off right now). Gain - when in shutter priority mode - can be at any setting. Film mode is set to My film, which is contrast -2, saturation 0, color 0, and NR +2 (film mode doesn't seem to have any bearing though).
The behavior: If I point the camera at something dark - say, a poorly lit part of the room, then point the camera at a brighter portion of the room - say, a light, or a monitor - the camera seems to increase the gain. At first I thought nothing of this - I thought the camera was adjusting the LCD as it does in still photo mode. But then I realized that if I lock the exposure, the camera is more sensitive when I point back to a dimmer scene.
So last night, I did a quick test in my living room. I had the lights off, but had ambient light from an adjacent room (it was fairly dark). I set the ISO to 1600, set shutter priority mode, cranked the gain all the way up, then checked to see if I was still getting this behavior. Sure enough, if I pointed at the light in the next room, the camera would gain up. I locked the exposure while pointed at the light, then panned around the dark living room. The clip I got was by far the brightest image I have seen out of this camera.
The downside of course, is that it seems I don't really have as much control over the camera as I thought - it is bumping up gain when I am not expecting it ( and the wrong way it seems - why would gain increase when I point the camera at a light?). Of course, locking exposure seems to prevent it from changing, but still...