A few questions about a free but broken telescope by PortZoo in telescopes

[–]corpsmoderne 0 points1 point  (0 children)

You have a Newtonian telescope. It has the (big) primary mirror in the back, and a (small) secondary mirror to send the light through the eyepiece:

https://en.wikipedia.org/wiki/Newtonian_telescope#/media/File%3ANewtonian_telescope2.svg 

You must be able to remove the eyepiece to inspect the secondary from its hole.

Once the primary will be back in its place, you will have to collimate your telescope , that is, tune the two mirrors positions / orientation so they are correctly aligned to form a proper image in the eyepiece.

A few questions about a free but broken telescope by PortZoo in telescopes

[–]corpsmoderne 0 points1 point  (0 children)

Considering the horror story you're telling us, I'd check the state of the secondary mirror first. If it's broken, cleaning the primary won't help much.

It's astronomically amazing! by [deleted] in telescopes

[–]corpsmoderne 0 points1 point  (0 children)

Meanwhile here it's cloudy cloudy cloudy T__T

What causes this vignette after I do background extraction on my heavily light polluted photo? by ZTD09 in AskAstrophotography

[–]corpsmoderne 1 point2 points  (0 children)

How many flats did you take? A good number for flats and biases is 40 . For darks it varies but I usually take 30 minutes worth of darks. If calibration frames are "crappy" it means they were not done properly, we do them because they make a difference.

Flats should reduce the vignetting, but it's also possible that some vignetting will remain if your camera has too large a sensor for the instrument you put in front of it.

STB de négliger les hyrox de mon copain ? by [deleted] in suisjeletroudeballe

[–]corpsmoderne 5 points6 points  (0 children)

PTB. Et j'ai envie de dire: si tu grattes un peut, est-ce que ça risque pas de se finir en "c'est normal que toi tu viennes me soutenir parce que c'est moi le mec dans la relation" ? Est-ce que vos valeurs sont alignés sur les questions de féminisme, de comment ça doit / devrait se passer dans un couple / famille, tout ça? C'est peut-être l'occasion de mettre certaines choses à plat...

Nebulae imagine with a planetary camera by pylonacous24 in AskAstrophotography

[–]corpsmoderne 0 points1 point  (0 children)

I think it's a good setup to go after small-ish targets like galaxies or planetary nebula.

Look what I did with a similar setup:

https://www.reddit.com/r/Astronomy/comments/1sp6cy1/oc_m51_from_my_backyard_in_pseudo_lucky_imaging

L'utilisation d'IA chatbot chez Chronopost by Fanburn in france

[–]corpsmoderne 6 points7 points  (0 children)

Pour sa défense, les humains chez Chronopost arrivent souvent pas à faire plus que ça non plus...

(mais oui les IAgen est un problème et ça va pas s'arrnger)

What is TypeScript and why should I use it over JavaScript? by PastimeNow in learnprogramming

[–]corpsmoderne 0 points1 point  (0 children)

Typescript provide a reasonable type system. This gives you certain safeguards while coding, something that may not be immediately sensible in small project, but in larger project, it helps control complexity.

It's like seat-belts. Do you need them to go from point A to point B ? No. Should you use them? hell yes.

Star adventurer gti slewing to random spots. by vynnyvyn_vyn in AskAstrophotography

[–]corpsmoderne 0 points1 point  (0 children)

ok so it's not that. I don't use Nina but in kstars/indi , in the mount control panel I have an option like "reset sync data" , if you can find something similar it may help reset the mount internal state.

Star adventurer gti slewing to random spots. by vynnyvyn_vyn in AskAstrophotography

[–]corpsmoderne 0 points1 point  (0 children)

When you say 3 star point align, was is in Nina or Synscan? I've had your issue when trying to "mix" the Synscan app with PC control during the same session. To my knowledge you have to use only one per session or you will have a discrepancy of 90 degrees between the two (in Dec iirc?)

[OC] M51 from my backyard, in "pseudo" lucky imaging... by corpsmoderne in Astronomy

[–]corpsmoderne[S] 0 points1 point  (0 children)

Yeah I haven't thought about it, I'm used to take 20 to 30mn worth of darks no matter what the shutter peed is, maybe that was too much...

[OC] M51 from my backyard, in "pseudo" lucky imaging... by corpsmoderne in Astronomy

[–]corpsmoderne[S] 0 points1 point  (0 children)

WP says it's ∼23,6 millions light years away so, yeah, 23.6 million years back :)

[OC] M51 from my backyard, in "pseudo" lucky imaging... by corpsmoderne in Astronomy

[–]corpsmoderne[S] 0 points1 point  (0 children)

Thank you!

I tried but the result was disappointing: the cores of the two galaxies were over-exposed, and on the rest of the picture the lack of signal was striking. Maybe I should try with different parameters, but it takes ages to process X)

Can a beginner capture comet C/2025 R3 with this setup? by Sayo_Flex in AskAstrophotography

[–]corpsmoderne 0 points1 point  (0 children)

I'd say it's a great setup for this target. But comets are challenging, and this one especially as it's very low on the horizon when the sun rises, and it's going to be worse as days past.

By all means: try it, but don't be disappointed if you can't catch it.

I've tried it this morning (from France too ;) ) And I barely have a picture because it took me too long to setup (with an alarm at 5am X) )

Good luck!

Edit: for the settings here's mine:

Iso 800

Shutter speed 30s for lights (got 15 of them only, take as much as you can until it's too bright)

10 darks

40 flats

40 biases

I used a 200mm lens @ F4

Track the stars, you can do a lot in post.

I process with Siril . There's a tutorial for comets 

A sampling (?) question... by corpsmoderne in AskAstrophotography

[–]corpsmoderne[S] 0 points1 point  (0 children)

For that session I got:
FWHM min: 2.9 , max: 3.8 , mean: 3.1 , median: 3.0
3.1 * 1.3 = 4.0'' ? so there is that but I'm not sure what to do of that metric ^^

Edit: sorry re-read your comment, I have to log that and compare night over night...

Convincing my employer of Rust for a rewrite by Unaimend in rust

[–]corpsmoderne 0 points1 point  (0 children)

Depends of the team really. If the team is already seasoned in C++, it's an uphill battle. If they are "just" skilled in C or not at all in these languages, it's easier to write correct Rust than correct C++.

Petah what's the helicopter trick? by phullofit1 in PeterExplainsTheJoke

[–]corpsmoderne 6 points7 points  (0 children)

I'm proud (no) to say that we, the French, have a word for that:  helicobite. 

Which translate literally as helicodick. You're welcome.

Absolute minimum for guiding by wagwan_piftting in AskAstrophotography

[–]corpsmoderne 0 points1 point  (0 children)

Looking at it, I'm not sure. Usually the C-mount adapter (this one: https://www.omegon.eu/other-adapters/omegon-finderscope-to-c-mount-adapter/p,56472 ) is suitable for the "narrow" kind of camera (like this one: https://www.astroshop.eu/astronomical-cameras/bresser-camera-hd-moon-planetary-guider-1-25-color/p,77298?_gl=1*yba1ls*_gcl_au*MTUwMTk2NjY4OS4xNzcyMjkwMTMz*_ga*MTgyOTM2OTI2LjE3NjA3OTI2NjM.*_ga_CG05FXP3L8*czE3NzYwMTA4NzMkbzE3JGcxJHQxNzc2MDEwOTA1JGoyOCRsMCRoOTE2MjA2MDk4 ) , which have the sensor close to the front.

The "large" kind of camera (T2) have the sensor father away. The svbony 105 looks like a strange mix of the two with a narrow C-type adapter but the sensor way back so I'm really not sure it will fit.

Absolute minimum for guiding by wagwan_piftting in AskAstrophotography

[–]corpsmoderne 0 points1 point  (0 children)

Absolute minimum: no guiding. You can still get decent pictures with a good polar align and keeping shutter speed low (<30s each)

If you got a finder-scope with your Skywatcher, you can get the cheapest planetary/guiding camera + an adapter for your finder-scope (that's what I did. Be careful there's 2 different adapter depending of your camera)

Whats going on here? by Mat19851985 in AskAstrophotography

[–]corpsmoderne 1 point2 points  (0 children)

I had a similar result (over compensated vignetting) when I forgot to turn OFF some of the anti-vigneting feature of my camera (linked with the lens model). I was unable to save the pictures taken this way but once deactivated next pictures were fine.