Canon Video Camera ISO 4000000 !

[John Murrell]

Apparently Canon are due to release their new video camera that has an ISO rating of 4 Million in December

 

See http://www.canonrumors.com/canon-me20f-sh-available-for-preorder/ the good news is the price has dropped by USD 10,000 to only USD 20,000

 

This is featured on the BBC click programme at http://www.bbc.co.uk/news/technology-34583397

 

Of course ISO 4 Million is not as big as it seems as the number doubles for each increase in sensitivity so it is only 11 stops faster than an ISO 1600 Camera but pretty good. Lux value is quoted as 0.0005 lux or less( Gain 75dB, f/1.2, 29.97P, 50IRE) so you need to factor in the cost of an f1.2 lens as well.

 

An idea for your Christmas Stocking ?

 

Regards

 

John

 

[John Mills]

Hi John,

At $20,000 you must be joking! At that price one could buy a Takahashi
TOA-150 APO and a high end cooled CCD camera and still have change left
over ;-)

Regards,
John

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[John Murrell]

Hi John,

I have no doubt the price will fall in due course. What is interesting is that to obtain the sensitivity they have limited the sensor to 2 M Pixels in a large format sensor. That way you get big Pixels and more sensitivity. Just the opposite ow what is happening with most other cameras where the Pixel count is the selling feature even if it means having Pixels about the wavelength of light like in a mobile phone !

Regards

John Murrell

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[Roy Easto]

Surely better to have a 20+M-pixel camera and the flexibility to 'bin'
the pixels for those times when sensitivity is more important than
resolution.

[John H K Murrell]

Hi Roy,

I am assuming you are talking about on chip binning rather than adding the outputs externally which has no real advantage.

There are still some disadvantages of binning - you have more dead areas between the pixels so you lose some sensitivity though micro lenses help with this.

The smaller pixels have the same well depth so you can saturate one of the 4 pixels while the others are 'empty' if the spot of light is around one pixel in size.

From what I read binning 2 x 2 only halves the readout time and 3 x 3 reduces it to a third so for speed big pixels win - remember this is a HDTV camera with 60 fps ?

Perhaps the biggest problem with binning this particular camera is that it is colour and binning the nearby pixels of the same colour due to the Bayer Matrix is either possible or would require a very clever chip design and very complex clock signals ( you have to bin the Red Green & Blue separately.

I guess large pixels might be cheaper to produces as well though defects may well write off the whole chip that may be acceptable on a single small pixel ???

Regards

John

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