I would be one that would vouch for the Skynix 2.0 Lumenera camera - it was way ahead of it's time and offers a very low noise CCD with really good after sales support. Lumenera has evolved their cameras to USB3 but they are very expensive. For solar work, I think the Skynix 2.0 still has some benefits.
I am finding that the ASI120mm camera offers a bigger chip, it's more sensitive and higher FPS but also depending on capture settings can also be noisy - but more frames can be stacked to overcome this.
So ASI vote from me or if you can get a second hand unit in terms of the other cameras people have recommended.
Go for mono with planetary - don't go colour if you want high resolution.
Good luck with your purchase and hope you get it in time for Mars.
John K.
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