ASI678mc

dfisherows

I bought 2 of these cameras for use as an all sky camera and planetary. The ad says it's the upgraded version of the 178mc which I use for an all sky setup and love the color. I thought the upgrade would make it better. Both of my 678s show purple on trees, grass and surroundings just like the 224 did. That is not an upgrade to the 178mc. For planetary I know I could add an ir filter, but can't do that with an all sky. Somebody want to explain to me how the purple is an upgrade.

w7ay

dfisherows but can't do that with an all sky

Why not? Just replace the clear protection window that comes with the ASI678 by this one:

https://agenaastro.com/zwo-d21-protective-dust-window-ir-cut.html

FWIW, I did that (replace its window) to a ASI294MC, which I use as my current all-sky (with a 8mm Samyang Sony E-mount lens), and I can easily adust the temperature and tint of the image (my own program using INDIGO; it interpolates temperture and tint from three (noon, twilight and night) settings to automatically get color balance for any other exposure values. This is from just now (7 pm -- 2 hours before sunset):

Other companies actually include extra filter windows in the box, when it is difficult to add filters to the imaging train. In the case of a QHY5III678 monochrome that I acquired not long ago, the extra included filter is an 850nm IR-pass window.

Chen

dfisherows

Thank you for your help. The new window fixed it. I really appreciate your help and the link. Thanks again.