S2 sensor

[zapp]

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Should we expect a single piece sensor in the S2 or one made up of several pieces which is often found in medium format backs. In the first case center folding would be no issue.

[jaapv]

Even the M8 sensor is read out in two sectors - this is not a specific medium format thing.

[mjh]

There are usually several (2, 4, 8, 12 …) read-out channels for parts of the sensor, but physically the sensor is always one piece of silicon. As Jaap said this is generally true, not just for MF sensors.

[delander †]

I thought DALSA could stick smaller sensors together?

 

Jeff

[mjh]

I thought DALSA could stick smaller sensors together?

I would be surprised if they could; do you have a reference handy?

[Guest guy_mancuso]

I believe the P65 + is two sensors stitched together. I have to confirm that though

[Guest guy_mancuso]

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Okay from a extremely good source , don't ask I would have to kill ya after I told ya. LOL

 

the background story here is that Leaf shipped some backs with centerfold issues a while back (3 years ago??) and got a black eye which (apparent from this post) they have not lived down.

 

Phase One has never shipped a released product with a centerfold issue

 

Also, I believe you can only see the segments (lightly defined) on a dalsa chip; the kodak chips are not visible. However, as mjh pointed out there are almost always more than one read out points and because we're talking about electrical signals having more than one read out point means that the tendancies/drift of each read out point must be very very carefully measured and counter-acted to prevent center-fold (or "stitching errors").

 

I don't know the sensor design of the S2, but given the flush times (shot to shot clearing of the sensor into the buffer) they are quoting it must have at least 2 if not 4 or 8 read out points each of which needs to be calibrated at the factory to avoid such lines.

 

So bottom line is: centerfolds have much more to do with poor quality control or insufficiently developing a product before release than with sensor design choices.

 

One more note this is what you can see by your eye looking at the sensor not what you see in the final image . That gets processed out.

 

Clear case also of a good raw processor to handle these choirs

[delander †]

I would be surprised if they could; do you have a reference handy?

 

I read this on their website under 'custom solutions'

 

'For even larger devices, we have the technology to butt wafer-scale tiles together with boundaries as small as one or two pixels, and to align these tiles for optimum flatness to extremely tight tolerances.'

 

But I have to say that I'm no expert in this area of technology so this could mean something else altogether.

 

Jeff