From the same page at Baader Planetarium:TheSkyBurner wrote: ↑Tue Sep 04, 2018 2:45 am consider the following information, directly from baader planetarium . (note that this says PROTUBERANCES - which are prominences,. impossible with astrofilm right? Yet here it is done and published by baader planetarium.de, using a garbage nikon camera.)
nd3.8, not nd5. Obviously the intensity is not the same as a true ERf system, but to say this will not image using astrofilm3.8 is literally wrong. I will post my images when Bob is done doing his thing.
https://astrosolar.com/de/informationen ... ha/#halpha
"Note from Baader Planetarium: What we have always considered impossible and have always answered in such a way with inquiries to our Narrowband filters, that succeeded in this admission of a customer. His wonderful single shot shows some shadowy protuberances on the edge of the sun - and a plane in the middle. This experiment works photographically, visually the solar disk would fade the protuberances, we have to advise against visual experiments of this kind for eye protection reasons! "
"Zur Aufnahmetechnik, das finale Bild besteht aus 2 separaten Belichtungen. Um den extremen Helligkeitsunterschied zu händeln mit zwei unterschiedlichen Belichtungszeiten. Das Bild mit der Oberfläche und dem Flugzeug ist 1/200 sec belichtet (ISO 200), das Bild mit den Protuberanzen 0.3 sec (ISO 200).
Die Bearbeitung habe ich mit Photoshop und Nik-Collektion (plug-in von google für Photoshop) gemacht.
Aufnahmeoptik war das Celestron EHD 11″ mit Reducer (x0.7), Kamera war die Nikon D810a, dazwischen war noch der 3.5nm."
"To capture technique: the final image consists of 2 separate exposures To handle the extreme difference in brightness with two different exposure times The image with the surface and the aircraft is exposed to 1/200 sec (ISO 200), the image with the protuberances 0.3 sec (ISO 200).
The editing I have done with Photoshop and Nik-collection (plug-in from Google for Photoshop).
Recording optics was the Celestron EHD 11 "with Reducer (x0.7), camera was the Nikon D810a, in between was still the 3.5nm."
Peoples, who are willing to work at F/7 and image the protuberances at 0.3sec exposure? Anyone?
Who are willing to downscale your such images in 10x to make them look barely barely acceptable for a quick glance? Anyone?
Who are willing to image the sun chromsphere surface with 0.05nm filter and Astrosolar at F/7 and about 2sec exposure at best and then downsize the image about 10x? Anyone?
Let see how may followers will try to repeat this experience or even go further in to the CaK.