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  1. Galleries
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  3. Astrophotography
  4. » Moon at 4500 mm equivalent (color version)

 
Moon at 4500 mm equivalent (color version)...

Astrofotografia lunghe focali Fuj

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Moon at 4500 mm equivalent (color version) sent on November 27, 2020 (15:08) by Daniele Bonfiglio. 8 comments, 903 views. [retina]

1/100 f/22.0, ISO 640, tripod.

Fotocamera al fuoco diretto di un Maksutov-Cassegrain da 1500 mm di focale. Versione a colori della foto che ho postato ieri.



View High Resolution 25.2 MP  



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avatarsenior
sent on November 27, 2020 (16:32) | This comment has been automatically translated (show/hide original)

Charming and mysterious!! :-o

avatarsenior
sent on November 28, 2020 (9:53) | This comment has been automatically translated (show/hide original)

Very sharp...
A greeting Gianka

user65640
avatar
sent on November 28, 2020 (14:03) | This comment has been automatically translated (show/hide original)

Micro-blurred and micro-moved very evident, it is the limit of the single shot at such important focals due to the seeing.
Do you have to try to make at least a 30in of poses and add them in autostakker, then see what difference (this also attenuates the grain due to seeing).

avatarjunior
sent on November 28, 2020 (15:00) | This comment has been automatically translated (show/hide original)


avatarjunior
sent on November 28, 2020 (15:17) | This comment has been automatically translated (show/hide original)

For example, between copernicus and eratosthenes craters there is a dotted strip that looks like an error of stacking or noise, but if you compare it to a lunar map you can see that they are micro craters. Or the Alpine Valley in the center of which you can see a very thin darker line that is in fact the so-called rhyme in the Alpine valley, as you can see very well for example in this beautiful photo www.juzaphoto.com/galleria.php?t=374490&l=it

user65640
avatar
sent on November 28, 2020 (23:34) | This comment has been automatically translated (show/hide original)

Hi Daniele, I believe it. I brought back the effect I feel in looking at it 100%.
I'm weird, I normally stakko a 20/40 ina of images and that grain effect disappears me with the sum, maybe as you say it's a talk of decisive power, it may be I don't know.

avatarjunior
sent on November 29, 2020 (8:33) | This comment has been automatically translated (show/hide original)

Hi Mc, thank you for the clarification. Let's say that with the 2x focal multiplier I am right at the theoretical resolution limit related to the diffraction of light, which for my instrument is about 0.3 arcsec/pixel while with my instrumentation I push myself a little below, that is to 0.27 arcsec/pixel. However, yesterday I did a test of the comparison between a detail of this photo and the same area with skysafari. As you see in the screenshot at this link photos.app.goo.gl/eKJpTNxLhjhgPY2k8
I
feel like even at this level of detail (facilities in the order of 10 km) I can find a great deal.
Thank you so much for the passage, my goal is to improve more and more in lunar/planetary photos.
Buona Sunday, Daniel

avatarjunior
sent on January 22, 2021 (10:17) | This comment has been automatically translated (show/hide original)

Good morning everyone,
altho good morning also to answer the right doubts expressed above by Mc0676, I did the study reported here: www.juzaphoto.com/galleria.php?t=3846262&l=it
This
study confirms that the "artifacts" in the minute details of the photo, are neither micromoxes nor any defects of optics, but actually due to the diffraction limit of the instrument.


RCE Foto

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