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June 24 2026 APP 2.0.0-beta46 has been released !

Improved internal memory configuration (lower ! memory usage), fixed beta45 startup issue, fixed Set Save Directory & 2-panel mosaics.

May 27 2026 APP 2.0.0-beta45 has been released !

Fully Multi-Threaded LNC, many improvements for the registration engine, platform upgrade, and further tuning of internal memory consumption and memory release back to OS.

Apr 14 2026: Google Pay, Apple Pay & WeChat Pay added as payment options

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.

 

No free lunch?

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(@oopfan)
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Joined: 8 years ago
Posts: 109
Topic starter  

Having just broken the sound barrier with 8-minute exposures, unguided, following software changes to my Raspberry Pi's periodic error correction, I wanted to ask the question:

Are the following equivalent?
1. Seven 8-minute frames using bin2 with 2x drizzle.
2. Seven 32-minute frames using bin1 with no drizzle.

In terms of signal-to-noise are they equivalent?
Clearly #2 will have better resolution but should #1 come close?

Two nights ago I captured seven 8-minute frames of PacMan in Ha (see attachment "PacMan_Ha_7x8m_bin2_no-drizzle".) Compare that to "PacMan_Ha_7x8m_bin2_drizzle-2x".

Is the drizzled image close to what I could expect by capturing seven 32-minutes frames using bin1?

I am wondering if bin2 imaging is a better option for me considering that I have a relatively slow f/5.9 refractor and a camera that is least sensitive to red.

Thank you.

PacMan Ha 7x8m bin2 no drizzle
PacMan Ha 7x8m bin2 drizzle 2x


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

Those are very good questions to which I have no certain answer. I would think using bin 1 will always give you better details as it's the best and most direct way to gather real data, whereas bin 2 is not necessarily solved by drizzling as far as I understand it. I could be wrong though, but I thought there's a difference between upsampling and dithering in this case. Bin2 is usually used to gather color data with more sensitivity and faster and then combining that with bin1 data which has the detail. Maybe @mabula-admin has more to say about it.



   
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