How can I know that...
 
Share:
Notifications
Clear all

Mar 28 2026 APP 2.0.0-beta40 will be released in 7 days.

It did take a long time to have the work finished on this and it  will have a major performance boost of 30-50% over 2.0.0-beta39 from calibration to integration. We extensively optimized many critical parts of APP. All has been tested to guarantee correct optimizations. Drizzle and image resampling is much faster for instance, those modules have been completely rewritten. Much less memory usage. LNC 2.0 will be released which works much better and faster than LNC in it's current state. And more, all will be added to the release notes in the coming weeks...

Update on the 2.0.0 release & the full manual

We are getting close to the 2.0.0 stable release and the full manual. The manual will soon become available on the website and also in PDF format. Both versions will be identical and once released, will start to follow the APP release cycle and thus will stay up-to-date to the latest APP version.

Once 2.0.0 is released, the price for APP will increase. Owner's license holders will not need to pay an upgrade fee to use 2.0.0, neither do Renter's license holders.

 

How can I know that my images are truly stacked?

6 Posts
2 Users
0 Reactions
1,147 Views
(@paul-from-northern-mi)
Red Giant
Joined: 6 years ago
Posts: 60
Topic starter  

Yesterday I ended up with disappointing results in an Orion photo processing.

There was 1 oddity that I wanted to check into to see if the reason for the disappointing results has to do with the images not being combined together.

The oddity was that the frame edge didn't have any kind of discernable rounding due to the natural earth movement applied to the star field.

I stacked 38 light frames.  Each frame was exposed for 1 minute, and there was 3 seconds of pause between shots.

Should I be seeing rounding on the integrated image within 40 minutes of exposure time?

Maybe I shouldn't but I just want to rule this out.



   
ReplyQuote
(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

Do you have an example you can upload here? If it's stacked and you preview it in the preview window, a stretch should be applied showing you a lot more signal compared to a single frame. 1 min is a quite low exposure time though, but it still should show this effect.



   
ReplyQuote
(@paul-from-northern-mi)
Red Giant
Joined: 6 years ago
Posts: 60
Topic starter  

Thank you Vincent:  What kind of example would you be looking for?  A jpeg of the completed project or a FITS after integration?



   
ReplyQuote
(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

You can post a jpeg of the final integration here, just to get a better idea of what you mean.Thanks!



   
ReplyQuote
(@paul-from-northern-mi)
Red Giant
Joined: 6 years ago
Posts: 60
Topic starter  

Vincent,

Here is the photo processed through.

I was hoping for better nebulosity and the result was somewhat underwhelming.  As mentioned above the reason I was wondering if this even stacked properly is that I didn't notice any rounding on the corners on the uncropped photo.

Orion1min 1stLNC it2 lpc cbg cbg csc St


   
ReplyQuote
(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

That looks fine to me, it's definitely stacked otherwise you would likely not see the surrounding nebulosity and a single sub is probably way darker isn't it? Getting more out of the nebulosity requires way more data, longer exposures per frame and ofcourse things like narrow band filters will help you a lot as well. But you will have to get towards 5 min and longer regarding exposure time.



   
ReplyQuote
Share: