Weird problem with exposure fluctuations

[Michael Solomon]

Ok, let me preface with the camera is set to everything manual. Nothing is on auto.

I have this weird problem where the camera is doing some sort of internal exposure controls when switching back and forth between dark areas and light areas. Please see the video for reference: http://www.youtube.com/watch?v=5XfSBDVzk5U&hd=1

Using a rokinon 35mm nikon mount with novoflex adapter. The problem is very noticeable on wider apertures 1.6-->5.6 Faster than that, it's still there, just to a lesser degree.

I actually noticed (see attached picture) that the figure circled in red (I actually don't know what it is) is what's changing when the exposure is changing. Do you guys know what this is and what the problem is? How do I fix it?

 

[stancemedia]

There is a gain button on the side of the camera.

If pressed it will auto set the gain and expose how
it deems fit for the scene.

I would investigate that first. It can be used with the
camera in full manual.

 

[mico]

That circled picture is your shutter speed and there is an A next to it meaning it is in auto mode that why you're seeing a change. Press the shutter button on the side of the camera and pick what shutter speed you want with the thumbwheel then press the thumbwheel to set and lock it. Reading the manual would be the right thing to do.

 

[stancemedia]

That circled picture is your shutter speed and there is an A next to it meaning it is in auto mode that why you're seeing a change. Press the shutter button on the side of the camera and pick what shutter speed you want with the thumbwheel then press the thumbwheel to set and lock it. Reading the manual would be the right thing to do.

I was close it's late and I just watched the video

And yes, the manual is pretty good. It sounds
cliche to say read it however it's always good
to know the camera's setting inside and out.

 

[Michael Solomon]

ah... must have screwed up and set it back to auto at some point. I read the manual cover to cover hehehe... Guess reading the manual doesn't protect you against your fat fingers pushing things they shouldn ^_^

 

[mico]

I think most people got accustomed to manuals where the first couple of pages had a big 2 page picture spread of the lcd display with a description of all the display info that got you up and running fast. Sony chose not to do that with the Fs100 manual so you're forced to read the thing carefully.

 

[AtticusLake]

I actually make this mistake a lot -- it's really a case of somewhat bad design.

To set a manual shutter speed, you need to press the "Shutter" button, then use the wheel to set the speed, then press the wheel to lock it. It's way too easy to press "Shutter" again in an attempt to lock the speed, but that just puts it back in auto.