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Old 30-10-2017, 02:40 PM
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Slawomir (Suavi)
Going visual

Slawomir is offline
Join Date: Sep 2014
Location: North Queensland
Posts: 3,217
Your calculations look correct to me Dunk.

Closer inspection of Sony's datasheets cause even more confusion, to me anyway, and it makes it harder to compare their sensors. For example, for IMX224 they state G sensitivity, whatever that means.

We still need to wait for the final numbers for sensitivity for the mono version of IMX428, since quoted 1600mV at f8 is only an estimate, according to Sony. No doubt sensitivity is higher (3200mV vs 2350mV both at f5.6), but QE might be about the same or lower.

And whether anyone will implement these in astro cameras, that is a different story.


Just found Sony's data sheet for ICX694, with its 4.54micron pixels this excellent and popular CCD has a sensitivity of 1000mV at f8. So if the new IMX428 with its 4.5 micron pixels has a sensitivity of 1600mV at f8, that would indicate a significant improvement.

Would be interesting to see how read noise, dark current and well depth compare for the two. Perhaos saturation signal can give an indication of well depth? It is 520mV for ICX814, 800mV for ICX694 and 1000mV for IMX428.

Last edited by Slawomir; 30-10-2017 at 05:56 PM.
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