GY-HM100 Gain setting at DVinfo.net

Colin Rowe · May 20th, 2009, 05:33 PM

I have just been testing the gain setting on my GY-HM100. In auto, the gain seems to max out at around 9db. Is there a setting that will allow me to conrol the maximum gain in auto mode. I have been used to this feature on previous cameras. I tested on a wall in my average lit living room. By switching between auto, and manual with gain set at 12db. The manual setting was far better. I was monitoring through a 42" screen via HDMI. Just wondered if this auto gain can be pumped up a bit??

Tim Dashwood · May 20th, 2009, 07:01 PM

You should be able to adjust the Auto Exposure (AE± button on back) while the gain is in AGC to increase the gain. That will determine how bright or dark you want the AE to be.

Elvis Ripley · May 20th, 2009, 10:32 PM

I just tried this pointed at a book case and auto gain seemed to go all the way up to 15/18dB

Colin Rowe · May 21st, 2009, 05:13 AM

Quote:

Originally Posted by Elvis Ripley

I just tried this pointed at a book case and auto gain seemed to go all the way up to 15/18dB

This is what I would have expected, I will do some more tests this evening. It seems strange, but as mentioned the image most definately brighened up when I engaged manual mode @ 12db. Perhaps other owners could comment??

Tim Dashwood · May 21st, 2009, 10:25 AM

Colin. Let me see if I can explain this better.

When using automatic gain control (or any combination Auto Exposure features) the camera will do its best to find the "proper" exposure. In your case pointing at a wall the camera settled on an exposure that it thought was appropriate, but you think it should be brighter. When Elvis pointed at a bookcase (which I assume is much darker than a wall) the camera required more exposure and then increased the gain accordingly.

You can tell the camera what you would like it to consider the "proper" exposure when using Auto Exposure features. You can do this by pressing the AE± button on the back and then adjusting the exposure the way you like with the adjustment dial. Once you are happy you can lock it in by pressing in and holding the adjustment dial for more than 1 second.

Elvis Ripley · May 21st, 2009, 10:28 AM

I would say that is right. I purposely didn't give it enough light and used a complex shot so that it would need to turn the gain all the way up.

May 20th, 2009, 05:33 PM	#1
Colin Rowe Major Player Join Date: Jan 2004 Location: Cornwall UK Posts: 793	GY-HM100 Gain setting I have just been testing the gain setting on my GY-HM100. In auto, the gain seems to max out at around 9db. Is there a setting that will allow me to conrol the maximum gain in auto mode. I have been used to this feature on previous cameras. I tested on a wall in my average lit living room. By switching between auto, and manual with gain set at 12db. The manual setting was far better. I was monitoring through a 42" screen via HDMI. Just wondered if this auto gain can be pumped up a bit?? __________________ Colin

May 20th, 2009, 07:01 PM	#2
Tim Dashwood Wrangler Join Date: Aug 2005 Location: Toronto, ON, Canada Posts: 3,637	You should be able to adjust the Auto Exposure (AE± button on back) while the gain is in AGC to increase the gain. That will determine how bright or dark you want the AE to be. __________________ Tim Dashwood

May 21st, 2009, 10:25 AM	#5
Tim Dashwood Wrangler Join Date: Aug 2005 Location: Toronto, ON, Canada Posts: 3,637	Colin. Let me see if I can explain this better. When using automatic gain control (or any combination Auto Exposure features) the camera will do its best to find the "proper" exposure. In your case pointing at a wall the camera settled on an exposure that it thought was appropriate, but you think it should be brighter. When Elvis pointed at a bookcase (which I assume is much darker than a wall) the camera required more exposure and then increased the gain accordingly. You can tell the camera what you would like it to consider the "proper" exposure when using Auto Exposure features. You can do this by pressing the AE± button on the back and then adjusting the exposure the way you like with the adjustment dial. Once you are happy you can lock it in by pressing in and holding the adjustment dial for more than 1 second. __________________ Tim Dashwood

May 20th, 2009, 10:32 PM	#3
Elvis Ripley Regular Crew Join Date: Apr 2009 Location: OK Posts: 62	I just tried this pointed at a book case and auto gain seemed to go all the way up to 15/18dB

May 21st, 2009, 10:28 AM	#6
Elvis Ripley Regular Crew Join Date: Apr 2009 Location: OK Posts: 62	I would say that is right. I purposely didn't give it enough light and used a complex shot so that it would need to turn the gain all the way up.