IR sensitivity of old digital backs

[MartinN]

Is there some consensus on old ccd backs IR sensitivity, either the proposed tv remote test or some more scientific consensus, how strong are the Phase One IR blocking filters, for example ?

 

[daz7]

I do not think that the IR blocking properties of the IR filters changed with the new backs - I think that the currently used Schott IR glass is the same as with the old models and I think that the most commonly used glass is Schott BG39. Obviously, the sensor may have a different base sensitivity but I am guessing that the IR filter built in the digital back would somehow level it out.

 

[MartinN]

Yes, maybe I have to try a 720nm filter, and see if there is any registration. But my question was a bit vague, and I was mostly interested in the IR sensitivity, if any.

 

[anwarp]

I think I got this data sheet for the CCD used in the IQ 260 from phase one support a few years ago when I decided to covert it to “full spectrum”.
This is from page 12 of the data sheet for the Dalsa FTF9168C

 

[MartinN]

I think I got this data sheet for the CCD used in the IQ 260 from phase one support a few years ago when I decided to covert it to “full spectrum”.
This is from page 12 of the data sheet for the Dalsa FTF9168C

View attachment 217072

Magnificient, that is more than I would have expected.

 

[buildbot]

Full datasheet for those interested: https://www.teledynedalsa.com/download/85b355e5-c8ba-4772-b81b-f5a7ee5c07d1/

They very nicely keep all this info available

I think technically, the CCD in the IQ2 is different slightly than the public version- sensor plus + the long exposure mode.