AstroBin

AstroBin

AstroBin

Pixinsight Error Msg in WBPP Flat vs Dark exposure? [Deep Sky] Processing techniques · RICK · ... · 6 · 134 · 1

Rick80134 0.00
RICK
...
· 
·  Share link
This is new, never saw this before.  My Flats will always have a different exposure time vs Darks.  My Darks and Lights are both 180s.  The flats are 12.5s.



Any idea what's going on?
ASI294MC Pro.
Of Note, I recently switched from FITS to XISF.  Flats and Lights are XISF.  Darks are from an older library in FITS.


Screenshot 2025-04-03 110242.png
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
andreatax 9.89
andrea tasselli
...
· 
·  1 like
·  Share link
Uncheck "Dark" in the Flat tabs. Use "Bias" instead and add those bias frames. Either one or the other must be there and flat-darks have the same exp. length of the flats (which are waaaaaaaaaaaaaaaaaaay too long, btw).
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
Rick80134 0.00
RICK
Topic starter
...
· 
·  Share link
andrea tasselli:
Uncheck "Dark" in the Flat tabs. Use "Bias" instead and add those bias frames. Either one or the other must be there and flat-darks have the same exp. length of the flats (which are waaaaaaaaaaaaaaaaaaay too long, btw).

I ended up shooting Dark-Flats as BIAS frames.

WRT flat exposure, the ASI-294MC Pro is NOTORIOUS for producing bad flats with anything under 3 second exposure.
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
andreatax 9.89
andrea tasselli
...
· 
·  1 like
·  Share link
RICK:
WRT flat exposure, the ASI-294MC Pro is NOTORIOUS for producing bad flats with anything under 3 second exposure.


Absolutely NOT TRUE. My flats are never ever ever ever ever more than 1s. And they never fail.
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
messierman3000 7.22
Oscar
...
· 
·  Share link
RICK:
WRT flat exposure, the ASI-294MC Pro is NOTORIOUS for producing bad flats with anything under 3 second exposure.


by "bad", do you mean they're too dim, or something else?

how are you taking flats?
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
Niels_L 2.39
Niels_L
...
· 
·  Share link
RICK:
My Darks and Lights are both 180s.  The flats are 12.5s.

WBPP takes your darks as flat-darks and thus the exposure time does not correspond.  Take some darks at 12.5s to use as dark-flats.
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
JohnAdastra 1.81
JohnAdastra
...
· 
·  Share link
Having darks to match the flats is always best. My cheat is to have a series of dark masters - 0.5, 1, 5 ,10, 15, 20, 30s, then use select the closest which is just greater than the flat exposure and check off optimize master dark. This should be close enough and much better than optimizing the longer darks that match your lights.
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
 
Register or login to create to post a reply.
×

Warning!

This operation will reload the current page. If you have any unsaved information in a form, it will be lost.

You can also dismiss this window, and your operation will be applied at the next page navigation.