MAY 4 2026: APP 2.0.0-beta44 has been released !
New improved internal memory controls should now work on all computers
May 1 2026: APP 2.0.0-beta43 has been released !
Improved internal memory controls (much more stable and faster on big datasets), fixed CPU image viewer, fixed Narrowband extraction demosaic algortihms.
Apr 29 2026 APP 2.0.0-beta42 has been released !
New improved Normalization engine, Fixed random crashes in integration, fixed RGB Combine & Calibrate Star Colors, fixed Narrowband extraction algorithms, new development platform with performance gains, bug fixes in the tools, etc...
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.
Topic starter
August 7, 2019 21:34
My image of the nebula region around the star Sadr in the constellation Cygnus. The pictures were taken on four nights with a TS-Photoline APO 360mm, using a UHC clip filter for my EOS 750Da. The total exposure time is 6 hours, which consists of 60s and 180s lights.
I hope you like it 😉Â
Clear skies, Stefan
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artem reacted
August 8, 2019 09:05
Yes, lots of details. I'm missing a bit of color though, this filter shouldn't supress too much color right?
Topic starter
August 8, 2019 12:10
I am quite satisfied with the result. It was the first time I used a UHC filter, so I can't judge yet if the filter suppresses the colors a bit. But that shouldn't be based on the filter's transmission curve.
The pictures were taken in July this year at a warm outside temperature. The chip temperature of my EOS 750Da was partly 29°C and the darks and flats of course have different temperatures. Of course this is not ideal for processing the pictures. This is the big disadvantage compared to a cooled CMOS camera.
The pictures were taken in July this year at a warm outside temperature. The chip temperature of my EOS 750Da was partly 29°C and the darks and flats of course have different temperatures. Of course this is not ideal for processing the pictures. This is the big disadvantage compared to a cooled CMOS camera.
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Maybe I should have experimented more with APP, but I don't have enough experience yet.
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Here are the technical data of the UHC filter:
- 97% transmission at 486nm (H-beta)
- 97% transmission at 496nm (OIII)
- 97% transmission at 501nm (OIII)
- 97% transmission at 656nm (H alpha)
- Optimum transmission position for devices with f/10 to f/3.5
- Passband: 480nm to 505nm and 645nm to over 700nm
- Homofocal with all other Astronomik filters
- Thickness of the filter: 1mm
- Not sensitive to moisture, not aging, scratch-resistant
- Fine-optically polished carrier material
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Transmission curve Astronomic UHC clip filter
August 8, 2019 12:19
Ah it blocks a decent amount, mainly for light polution purposes.
edit: no blue shouldn't be blocked. So interesting why that's not present here. Anyway, food for thought in a next attempt maybe. 😉 Could also be due to the exposure, if stars get saturated color is lost as well.
