Moon Photography with Petrus Kurppa


Here we see the telescope with it’s different parts.
This here is a red dot sight with the red dot sight it’s easy to
direct the telescope on a desired object The Moon, a star or some planet for example It doesn’t magnify at all, but there’s a little red dot. When you use the dot to aim at your object the telescope will also show the object because the telescope and the sight are thus aligned together Next, here at the optical axis we have a telecompressor, or focal reducer this gives us a larger field of vision the next part is simply an adapter
that provides us with a certain thread so we can attach an Amici prism The Amici prism will turn the light,
which now arrives like this it turns it 90 degrees because otherwise, we’d have to look like this which is rather uncomfortable. So the direction is turned 90 degrees,
and then we have the eyepiece into which we look And then it depends of course how high in the sky the object is… …whether the Amici prism isn’t in fact inconvenient It IS also possible to also look directly along the telescope’s optical axis.
Like this. So we can use it like this also. Now then Hear at the front of the telescope we first find a corrector lens,
it is this glass part here The light passing through it hits the
large primary mirror here at the back of the telescope which is a bit concave and therefore it gathers the light here to this secondary mirror here in the middle which in turn sends the light back along the optical axis You can see a little hole in the middle of the back through there, the light passes here, to the viewer That allows for a long focal length The light first travels back here then back to the front, and then once more back This allows for a focal length of a little over 2 meters So what exactly are we doing to these photos,
we’re “stacking” them, no? Yes. Or actually, we have here a video of which we can stack one single image A video is made up of single frames (pictures) 25% of the original number of frames is a commonly used amount of material I myself am an extremely
non-technical, non-scientific person So stacking can seem like a really difficult thing to do like it’s not gonna work So what’s good about these software is that you can do quite a lot
just by clicking the different options and studying on YouTube how they work Here’s what we did Markus: This is the end result of the process? Petrus: This is the result 158 frames were selected from the video It’s pretty good Then we can give finishing touches with
some image processing software adjust contrast, brightness to get the final pic that we can put on Instagram or just on the wall Markus: NOW we know why you’re actually doing this Petrus: That’s part of it M: So how did you become interested in astronomy? P: It started when I was a kid, from
Mauri Kunnas space book (a childrens’ space adveture) M: Right, the one where they take the bus to space P: Yeah, since I read that as a child,
I’ve been interested in space As I grew up joined the Ursa Turku branch
(Ursa is a Finnish amateur astronomy association) and this way got deeper into the circles M: So what about the Moon, how is it that you’ve
become interested specifically in Moon now? P: I was already interested in the Moon in the beginning when I went to the Iso-Heikkilä Observatory to photograph with their telescope I was especially curious about the Moon already then but back in those times I was using a film camera I sort of dropped that hobby It was quite difficult and it was harder to do methodically compared to today These days technology makes photographing
systematically is much easier than in the age of film and there’s so much more reference material that you can more easily plan
what you want to go and shoot There’s the saying about not seeing the forest for the trees. It kind of applies to the Moon as well You should have some idea
what you’re going to look for otherwise you might think, oh it’s just the Moon M: So the Moon actually offers
quite a lot to do for the enthusiast P: Yes.
M: There’s plenty to see P: But then of course, in the case of the Moon, everything is not always visible Certain topographical features
might be visible only for a few hours So you have to wait for the right moment and then make the effort to go look at something M: All right so what’s the next step in your Moon hobby?
Do you have some new equipment in mind, or…? P: Yes, next I’m planning
to get a better tripod, a more stable one Possibly a telescope with an apochromatic lens. It corrects for chromatic aberrations But these are long-term plans M: Thank you so much Petrus.
This has been extremely interesting! P: Thank you for coming, Markus.
I enjoyed talking about this hobby.

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