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| sent on March 30, 2018 (13:54)
I started with 192 raw frames, 5184x3888px, taken in 60 frame bursts at 10 fps until the buffer was full, then I had to wait a few seconds. The moon just fits into the frame. No chance without a tracking mount. I then went through and threw out the obvious bad frames, concentrating on the terracing on the east side of Arzachel. That cut it down to about 65. A second sorting cut it down to 29 frames which I exported as tiffs and stacked in AutoStakkert3 and sharpened in RegiStax6.
The EM1 Mark II does not record video larger than 4096 x 2160px, and also not in raw.
We seldom have good seeing here, on the outskirts of Vienna, but it was not bad that night, just very windy which made for many blurred frames. I go up a hill (400 meters above sea level) a bit away from the city, close to where we live (Mauerbach) to get away from the light pollution and the bad air from the heating systems in the houses nearby. |
| sent on March 30, 2018 (18:09) | This comment has been automatically translated (show/hide original)
You did a good job, Daniel. It's true, if the barlow is not of the highest quality it can give you those problems: try the Meade duplicator and let us know the difference. If you want to further enlarge the image without adding other optics you have to increase the "draft", that is the distance between the refractor's focus and the film plane. Your ED triplet is a great tool! Hai fatto un buon lavoro, Daniel. E' vero, se la barlow non è di ottima qualità può dare quei problemi: prova con il duplicatore Meade e facci sapere la differenza. Se vuoi ingrandire ancora l'immagine senza aggiungere altre ottiche devi aumentare il "tiraggio", cioè la distanza tra il fuoco del rifrattore ed il piano della pellicola. Il tuo tripletto ED è un ottimo strumento! |
| sent on March 30, 2018 (21:33)
The Barlow I used is, from what I have read, supposed to be quite good. It is a Celestron Ultima 2x, 1.25", the short version with three elements. It seems to perform well in the center, which is all that matters for viewing, but for photography it is not so good. I could have done a mosaic, but it was the first time I tried it and didn't realize it would be so soft around the edges.
Almost full moon tonight, and calm out, but I can't even see Polaris! Too hazy.
Yes, the triplet is really good, much better than the Skywatcher 80/600 Black Diamond I had before. Mostly I use it on birds!
www.flickr.com/photos/42162009@N04/albums/72157635228747166
Second half of this bunch is with the triplet.
I just fear I have reached the limits of what I can do with it and at my age (73) I don't really want to spend a lot of money on something like a Big Mak. 
Ciao |
| sent on April 12, 2018 (22:51) | This comment has been automatically translated (show/hide original)
very very very beautiful, congratulations!
Hi Gerry. molto molto molto bella, complimenti!
Ciao Gerry. |
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