gradual ND electronic filter

[Lemaildetom]

I'm probably talking nonsense, I have no idea what this would involve but I saw that on some compact camera, a built in ND filter is present.

Is this an electronic filtering or an actual filter?

Would it be possible to have the same thing on SLR camera? Would it be the same thing at creating an ISO 25 / ISO 12.5 / ISO 6.25.....?

Would it be possible by twicking the iso apply to each cell of the sensor to create an electronic grad filter?

Lot's of question, but i was just thinking that it seems possible to me to change the ISO throught the sensor and it would be ideal filtering pixel by pixel!

 

[st599]

An LCD of some sort.

 

[Musicman]

I'm probably talking nonsense, I have no idea what this would involve but I saw that on some compact camera, a built in ND filter is present.

Is this an electronic filtering or an actual filter?

The Canon PowerShot G series advanced compacts have had built-in ND filters since the G3 was launched in 2002.

The current G16 has a real, 3-stop filter. The Panasonic LX-7 and Fuji X100s have one too.

Would it be possible to have the same thing on SLR camera? Would it be the same thing at creating an ISO 25 / ISO 12.5 / ISO 6.25.....?

Would it be possible by twicking the iso apply to each cell of the sensor to create an electronic grad filter?

Lot's of question, but i was just thinking that it seems possible to me to change the ISO throught the sensor and it would be ideal filtering pixel by pixel!

I think the problem would be that the circuitry to control such a filter would significantly reduce the amount of light hitting the sensor and increase noise, even if you could produce it to control light at the pixel level.