D7100 'streaking'

Started Apr 7, 2013 | Discussions thread
mosswings Veteran Member • Posts: 8,957
Re: not an issue

fotolopithecus wrote:

Are you sure Fuller ain't full of it mossy? Because it doesn't appear to be there for the D5100 shot horshack posted a few hours ago.

He knows what he's talking about. It's me that likely doesn't.

The isolation between pixels in Purcell's (sorry, I remembered the name as Fuller) mechanism is basically dependent on how low you can make the parasitic capacitance between each pixel and the common row or column bus, and how well you can turn on/off the pixel buffer.  The former requires fine lines and space (vertically and horizontally), the latter stable biases at readout time and suitably sized buffer devices and tail currents.  It's entirely possible that the Sony 16MP sensor uses higher tail currents and bigger buffer devices.  It's also true that it's operating a bit slower as well, which improves settling times.  Finally, Sony's EXMOR sensor architecture is capable of balancing out row-to-row variances in conversions. This doesn't mean that it would fix this defect, but we have no idea what circuit architecture the Toshiba sensor is using.

Bottom line, Purcell's mechanism is applicable to the D5100, but the circuit operating parameters are different.

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Olympus XZ-1 Olympus Stylus 1 Nikon D90 Nikon D7100 Nikon AF-S DX Nikkor 18-105mm F3.5-5.6G ED VR +5 more
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