elgol20

Here or here you can see that of course it is not the same for you add read noise in the single exposures, but nevertheless a 100*5 sec expsoure is not a 5 sec exposure since the total expsoure ...

maybe omit the one dark, adds too much noise, or stack more dark togther and subtract from the final stack.

could be light inside or "overprocessing". there are tutorials on that. try astropixelprocessor 30day trial with all calibration files needed. what exactly does the software do? flats might need ...

there are a lot of tutorials on youtube. the start ist hard so best would be to have the "right way" to begin with haha otherwise it'd take superb efford. depends how deep you want to dive into ...

from this

I'd say it depends. The following were meant to be test pics from bortle 8 skye done with l-enhance and a dslr chip: worst was the seeing, but not really a waste of money I believe. If you add star ...

Hi Steve, not sure if any here used a Redcat... The quality is better than my Nikon 400 f/2.8, which is really good at f/4, comparing star shapes on fullframe. Given the rather small aperture, it ...

hi peter, not really. though I was first a bit irritated by the"halo" of Hatysa in orion: OIII extraction of the ASI 2600mc. I think it is ok. for comparison the maybe a bit stronger stretched Ha: ...

thanx Peter. yes the 2600 is superb i think. i even stopped using darks and even flats for i hardly see a difference when thouroughly dithered. it is also absolutely free of dust so far. maybe ...

hi, I have the initial and the tilting adapter. with both you can instal 48mm filter inside. Means any Redcat should have this

Hi David, Sigma can have decentering problems yet rare with the Art series. I had a decentered 105 once tested yet not that strong.

Hi, just a quick bortle 8 test again: fighting to calibrate the mofoc: Must say I really enjoy this testing on the balcony in the hard times... this was done by extracting h-alpha and Oiii by astro ...

Hi, instable weather, so, playing on a bortle 8 balcony and light stuff: tried the l-enhance in front of the Sigma Art 135, thus f/2.8, on the D810a from Nikon. The star-artefacts are hopefully ...

some say with dual narrowband you cannot produce ok star colors. why not? RGB is there, so, if stars are separated, one should be able to get decent star colors Ha extraction OIII

Hi, just playing around a bit, done with ASI 2600MC at Bortle 8 sky: L-enhance, really curious what the l-extreme can do when I get it, finally.. Clearly had to remove light pollution from OIII, ...

hi, tried some new things on the Dark Doodad. I like it: 135mm, D810a 400mm

where to learn? The problem with what can be found in the net is that it omits the most crucial learning steps inbetween, all these failures and rise-agains - and... most important, there is no ...

I am still waiting if to book a flight. Not sure if these comanies will survive, maybe in a coulple of weeks give it a try, since I am part of the team next year

this is like 12 min at f/1.8. If it is worth it. Maybe I need to check again. Sigma Art lenses differ though. Good look with it. Corona numbers have gone pretty bad lately in Namibia... Let's hope ...

Hi Chris, I chose to do it with f/1.8. I see no logic in doing it at f/2.8, what do you think? Vignetting is really small and field curverture can be compensated by focussing carefully. But this ...