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Monochrome sensor conversion... seeking advise

Started Nov 7, 2016 | Discussions thread
petrochemist Veteran Member • Posts: 3,619
Re: Monochrome sensor conversion... seeking advise

Enginel wrote:

khunpapa wrote:

The astronomer is bolder than we think !

http://www.jtwastronomy.com/tutorials/debayer.html

Part I

https://www.youtube.com/watch?v=huTFrjfBzEw

Why would they do this, because they remove CFA with microlenses (on front-illuminated sensor), QE will surely be not any better than it was

Astronomers are working with dim light, and for nebulae are also needing a narrow wavelength range. Removing the Bayer filter allows all the sensor to be used for capturing those elusive photons, rather than just blocking around 3/4 of them (for Ha imaging at 626nm, with the hotmirror removed). Even Green O-III nebulae would have 1/2 the photons blocked by the Bayer array.

With exposures often totaling hours rather than just seconds a 4 fold sensitivity gain is understandably desirable.

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