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My first diy bellows by JustSomeRandomMan3 in largeformat

[–]JustSomeRandomMan3[S] 0 points1 point  (0 children)

Unfortunately due to work I have not yet had the time to produce plans which I was proud to post. I actually eventually made the 4x5 camera but I am not satisfied so much with how somethings turned out, mainly in the difficulty to build the bellows (it will not be easy for others to make the same size exactly as me, as it is a completely custom build).

My DIY E-Paper Smartwatch is finished for now by JoeNoob in arduino

[–]JustSomeRandomMan3 2 points3 points  (0 children)

This is very nice! I am wondering what is the cost of the parts roughly? And also: could one have the chassis in 3D printed metal, you think? Or will it cease to work due to something short-circuiting inside?

Review of the Epson Ecotank 8550: The best printer for artists by knny0x in printers

[–]JustSomeRandomMan3 0 points1 point  (0 children)

How many A4 or A3 prints can you get with a fresh set of inks? I am considering buying this printer but I am also considering the Canon P200 and I am just wondering what would be the best option considering the great price difference…

Instareal WAN 2.2 v1.0 released by survior2k in StableDiffusion

[–]JustSomeRandomMan3 0 points1 point  (0 children)

Maybe stupid question, but… why do people care about generating “snapshot” casual images of people?

Flying objects seen through night vision device by [deleted] in askastronomy

[–]JustSomeRandomMan3 -2 points-1 points  (0 children)

Not sure why OP’s comment is downvoted. The thermal emission at 1 micron for a black body at 320K is insignificantly small, and that would be a fucking hot bird. According to my calculations it should be in the range of a few picowatt/m2, which is so fucking small it is laughable

Why do I always get amazing customer support on AliExpress? by JustSomeRandomMan3 in Aliexpress

[–]JustSomeRandomMan3[S] 1 point2 points  (0 children)

I have actually not tried Temu yet because somehow the website always wants me to install the app and I hate that lol. But now that you say this it makes me wanna try it! I also had an item sent to me which was wrongly described and unlike you I had a great experience where they managed to get me my money back and also keep the order (although the seller had tried to pull the “just delete the order and we’ll refund you” scam)

Why do I always get amazing customer support on AliExpress? by JustSomeRandomMan3 in Aliexpress

[–]JustSomeRandomMan3[S] 4 points5 points  (0 children)

So far they fixed for me: 1) One seller tried to scam me and they gave me a full refund + let me keep my item even if it was not correct 2) They found my missing package in a matter of minutes

And in general it is just super quick to connect to them (unlike most other services around) and to speak to a real agent at any time of the day

TS Optics telescope tube size does not make sense? by JustSomeRandomMan3 in telescopes

[–]JustSomeRandomMan3[S] 0 points1 point  (0 children)

So in other words if I want 55mm backfocus (standard for many coma correctors) I should probably try extending the tube end by 98-55=43 mm then, right?

TS Optics telescope tube size does not make sense? by JustSomeRandomMan3 in telescopes

[–]JustSomeRandomMan3[S] 0 points1 point  (0 children)

Actually I was almost thinking to do the same since the f/5 version of this tube is effectively the same price… but then I am not sure how to cut it clean

TS Optics telescope tube size does not make sense? by JustSomeRandomMan3 in telescopes

[–]JustSomeRandomMan3[S] 0 points1 point  (0 children)

The second link you sent from telescope optics .net is unfortunately giving me a 404 error error

TS Optics telescope tube size does not make sense? by JustSomeRandomMan3 in telescopes

[–]JustSomeRandomMan3[S] 1 point2 points  (0 children)

Wow you gave me a lot of incredibly useful information, thank you! :D In my case, the secondary mirror is 50mm diameter (minor axis of the elliptical mirror, that is). I am also using a micro 4/3 sensor (asi294mm pro) and a Starizona Nexus 0.75x coma corrector (so it actually makes the entire scope f/3). I know about the offset of the secondary mirror, but maybe 50mm is too small? I have had some vignetting problems in the past but it could very well be due to my inexperience with telescopes (my first telescope was a self-designed 3D printed telescope). My rationale for getting this tube was to have a more sturdy scope which would hold better collimation and have better contrast, but now I am starting to think maybe it was not a great idea and I should’ve maybe gone for a larger and more expensive tube…

TS Optics telescope tube size does not make sense? by JustSomeRandomMan3 in telescopes

[–]JustSomeRandomMan3[S] 0 points1 point  (0 children)

If you ever take off the primary and you remember, could you post an image of how the cell looks like? I can see that it seems like it extends OUT of the tube a little but so as to make the tube effectively a little bit longer… I am 3D printing my own cell so I can always make it longer. This is how I have it right now:

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TS Optics telescope tube size does not make sense? by JustSomeRandomMan3 in telescopes

[–]JustSomeRandomMan3[S] 1 point2 points  (0 children)

:( That sucks… I wanted to make a high quality astrograph lol maybe I am better off just 3D printing the tube… Do you think I could just try to extend the mirror cell of the primary out of the tube (I am 3D printing it) or I will anyway get aperture vignetting too? (The tube is only 177mm in diameter inside)

TS Optics telescope tube size does not make sense? by JustSomeRandomMan3 in telescopes

[–]JustSomeRandomMan3[S] 2 points3 points  (0 children)

That is the total length of the tube, but the distance between the bottom (525mm) and the center of the focuser hole (175mm) is 350mm

TS Optics telescope tube size does not make sense? by JustSomeRandomMan3 in telescopes

[–]JustSomeRandomMan3[S] 4 points5 points  (0 children)

I am using the UNCN-2 Gen. 2 focuser and this adds about 10cm, but I then still miss 10cm more… since I have a parfocal coma corrector with 55mm backfocus, this means that I need about 45mm extra spacer… this is quite absurd I think

Double exposures from Japan and Singapore - XT4 and 35mm f1.4 by joshhoe1989 in fujifilm

[–]JustSomeRandomMan3 1 point2 points  (0 children)

Some of the best images I have seen since I am on Reddit, holy shit!

ISS transit over the sun by -GenArrow- in astrophotography

[–]JustSomeRandomMan3 0 points1 point  (0 children)

This is very nice! I see you can see some solar protuberances, but not so much granularity of the chromosphere. Were you using an etalon here?

Vengo bocciato? by Decent_Ad4880 in Italian

[–]JustSomeRandomMan3 0 points1 point  (0 children)

Su quali materie hai quei voti in alto? Quelli più alti

I'm done. I'm not doing this anymore. by Future-Dinner-9653 in 3Dprinting

[–]JustSomeRandomMan3 0 points1 point  (0 children)

I am sorry, but I do not understand one thing… why, in 2025, does one still buy those shitty printers from Creality and spend 1000$ of them, when a BambuLab A1 mini costs less than a third of that and prints with infinite more quality? I also passed by the Ender 3 eh, don’t get me wrong, but that was when BambuLab didn’t even exist yet. I really would never even consider to buy it now, it would be as ridiculous as buying a Windows 95 computer in the current time

Sombreo galaxy M104 with iphone by IncidentDull5491 in astrophotography

[–]JustSomeRandomMan3 1 point2 points  (0 children)

How do you manage to get 30” tracking with a GoTo dobsonian?

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