Making a solar eclipse projector

[@Wes12940]

Of course we watch to the end! Can't wait to see the actual eclipse now!

[@magnoliaweathershield443]

I'm not anywhere near the eclipse path, but its so good to see Matthias do his thing.

[@TheWangbolizhong]

❤

[@AssNutz]

At least on paper 🤣

[@1pcfred]

I saw the last one so I'm skipping this one. If it was passing right over where I live I'd check it out but I'd have to travel quite a distance to get in the path. Being in the path of totality is what you want.

[@Watchyn_Yarwood]

Me too! I am located just inside the area of totality. We are supposed to get 41 seconds of totality and 2 mins 30 seconds total time in eclipse.

[@JayCoww]

All the way to the end. Every time. I think many of us would gladly watch you narrate literal paint drying. Your presentation is a big part of what makes your videos interesting, as much as your insights. We love you, Matthias.

[@cobba42]

Some people don't care about the topic? Doesn't make it any less fascinating!

[@AssNutz]

It does to them

[@sssiod]

Optics topics are the best.

[@charlesenfield2192]

Find a topic almost everybody cares about, and it will almost certainly bore me to death.

[@nottimothy5994]

*Doesn't make it any lens fascinating

[@charlesenfield2192]

I can see your childrens' expressions from here. 😀@@nottimothy5994

[@DudeMcDuderson]

I watch all your videos to the end Matthias. It's less about what it is, but more about the thought process behind it.

[@aserta]

Grandpa converted the whole barn for the 2000 eclipse, made it into a "camera obscura". He took one of grandma's best white bed sheets and strung it like a drum over a frame he made, then painted it with white paint. I don't recall what exactly he used to project it, but it was a series of lenses inside a big concrete cardboard form tube. Was really neat. Pretty big, the sun was about 50 cm tall and pretty detailed, we had it project the sun for a few days before and after and you could see the solar spots, almost forming like a couple of bands. I recall that when the eclipse was in full swing, we could see details of the moon. The "seas" and very faintly a few of the larger craters. It was a neat experience. And yes, grandma wasn't happy about it, especially since he almost started a fire.

[@scotttovey]

How did he almost start a fire? That would be a good thing to avoid if one wants to recreate the viewer.

[@doughnut1107]

@@scotttovey Focused sunlight can easily light things on fire. I'd assume any misalignment is a fire hazard.

[@1pcfred]

I just stood outside with eclipse glasses on and watched it.

[@doughnut1107]

@@1pcfred Making the image 100x larger by magnifying it, changes what you see. You might believe that the glasses you used produced the same output, but you are incorrect.

[@scotttovey]

@@doughnut1107 Good point. That reminds me of when my brother used a magnifying glass to get a piece of paper smoking when we were kids.

[@rolandradius9088]

Love the way you bring the engineering into woodworking and the woodworking into engineering. NOT using a multi thousand dollar optical bench and actual formulas for explanation is a breath of fresh air.

[@genericuserid7283391]

Come for the wooden bandsaw tutorial, stay for the interesting topics. Honestly can't wait for the next sawdust collection vortex build!

[@bilexperten]

I don't understand everything you say. But it's intresting so I keep watching

[@richbuilds_com]

I for one am more than happy to watch you explore pretty much any subject. Keep on, keeping on!

[@devandestudios128]

Man, I find anything you discuss to be interesting because you break it down to a more simple to understand language.

[@RickRolling-tc7vb]

I thought we were going to cut to a spreadsheet at the end there. Damn Matthias, what a tease. Anyway, this channel is so like the random thoughts that pass through my head and never get traction, so I'm always up for curiousity and experiments on the what if, even if it's vicariously in Germano-Canadian.

[@FearsomeWarrior]

Watched to end. I have a desire to see woodworking but understand nearly everything made was because you had some need for it. Just hoping that aligns with some great projects over the next few years.

[@Jped277]

Heck yeah I watched to the end. I love your videos Mathias. You have been responsible for unknown amounts of shop experiments and projects at my house.

[@PurpleHaze2k9]

keep on making them. Do what you want! The real followers will follow!

[@jlstone55]

Matthias, look into the design of the Sunspotter Solar Telescope! It's a wooden Keplerian projection telescope that has a triangular design and uses similar lenses to what you used in your video, and mirrors to bounce it around the triangular frame so the whole thing stays compact and you can keep it aimed at the sun or move it if there's clouds. I'd be very interested to see if you could build something like that! I used one at our local Planetarium for the 2023 October Annular eclipse in Nevada, and it was really quite intuitive to use and lots of kids and adults came up to the table to ask me about it and see the eclipse, and even sunspots projected on the paper.

[@maddsmish]

You're the best, I love how enthusiastic you are when doing new (perhaps to the channel, perhaps to you, perhaps both) stuff.

[@tonythepwny]

Why wouldn't we watch until the end for such an interesting topic?

[@jonnafry]

Optics waters run deep ... love the physics and history you present here .. thanks for these. Wishing you clear skies.

[@ianbennett5245]

You have way too much time on your hands, for which I am forever grateful. As an aside, I witnessed the 1999 total eclipse in Cornwall UK, directly under the midpoint and it was unforgettable.

[@waynesinden]

I watched this again and a I can't help but think that you remembered everything you learned in high school.

[@Stebanoid]

Videos about something that the author loves are the best kind of videos.

[@superdau]

Of course I watch to the end! Even though I do a lot of woodworking myself, it's not what I care about in your videos. I like the engineering process. I am an engineer myself (IT at first, but moved to electronics and mechatronics). I couldn't care less about someone building a shelf or a table. I care about how it's built and you're one of the few who uses "non-traditional" methods. About the topic itself: optics is something I still haven't developed an intuition for. For everything else my guesses put me in the right ball park right from the start, be it software, hardware, component selection or mechanical dimensions. I just have a "feel" for what is needed and how it's done. But optics? Nope! No clue at all without going to drawings and formulas.

[@benliebhaber7099]

I watch till the end because you are a real genius and explain things in a way that works for my mind. 👍

[@syntetyczny]

Physics in real life application is the best :) That is why I watch till the end !

[@ww321]

One of my favorite telescopes is my 1969 Sears Discovery 60mm f15. It has almost no Chromatic aberration. Even with a severely damaged lens, it still gives excellent views

[@joethompson11]

Definitely a topic I never considered until you started doing videos on it, but if you're interested, I'm watching!

[@c0mputer]

Grind your own lens out of clear wood.

[@fredparsons5134]

😂

[@Glassed_in_Nature]

I’m seriously loving all these random science experiments, please continue to do more!

[@netroy]

your optics videos are great 😊. looking forward to the follow up video after the eclipse.

[@hassiaschbi]

As a kid I built such a projector using my telescope and and a music stand holding a sheet of paper. Worked great 👍🏻

[@woodfather]

I've never watched so intently while understanding so little 😄

[@sleepib]

I bought a $10 pair of binoculars and cut them in half to make a couple sun projectors, with poster tubes and some parts I 3d printed. I get about an inch wide image of the sun in a 2 foot long assembly, and the image is clear enough to see sunspots. Made them for the last eclipse but got rained out. Might be worth making it small enough that you can drive somewhere if you have bad weather the day of the eclipse.

[@presentdayjeff5790]

Fascinating. As you frequently do, you’ve stimulated a new area of interest for me.

[@DeniseSkidmore]

As someone with -14 to -17 glasses (vertex distance is a bear) I really appreciate the optics content! I think gears and optics are fine friends for channel topics, they are both fundamental engineering/physics.

[@MrXenon1977]

Optical knowledge can be so much fun if its experimental and can be experienced hands-on. So many optical "experts" always do as if it would be absolutely abstract and would be completely unaccessible for ordinary people, but videos like this really show that it is a kind of magic, but it can also be an easy going, intuitive kind of magic. Thanks a lot for this!

[@matthiasburger2315]

Very enjoyable video. For some reasons I found the term "test sun" very funny... I can hear the regret of a true natural scientist not to be able to set up a small fusion-reactor for better demonstration.

[@DB-thats-me]

I learnt more in 8min than 5 years of high school. 🤓 Of course I watched to the end AND went back to find your posts I’d missed. 👍

[@albertobelfast]

I love these videos too, even though you are condensing a 3 hour lecture material in less than 10 minutes and I need to rewatch them 18 times to understand what you are doing.

[@MasterofNoneTV]

Create what you like Mattias, KZbin is full of garbage to satisfy the algorithm. You're content is refreshing and educational. Thank you.

[@Trogdar]

That camera focus and lens demonstration helped everything make so much sense!

[@jaimeskiebel]

I love the topic, also! Thanks for continuing to make videos on the subject.

[@baconsledge]

My dad was an optometrist so I always appreciate lens related topics!

[@jeffspaulding9834]

Optics is one of those fields that I think I could have easily fallen into if my education had led in that direction. It seems to me (I might be wrong here) that it's one of those fields where our mathematical models are particularly good at reflecting reality. That's one of the things I love about electronics as well.

[@conradfjetland4970]

It is your natural curiosity and ability to explain the physics/math that I have forgotten that I enjoy. Thanks and please keep making the ones you want to make.

[@ro_yo_mi]

Loved the measurement to the camera, then you held up a lens to illustrate the point.

[@MCsCreations]

That's so freaking interesting, Matthias... Why wouldn't I watch until the end? 😉 Anyway, stay safe there with your family! 🖖😊

[@ardenthebibliophile]

Genuinely one of the best descriptions of focal lengths and diopters. Going to be a fun eclipse!

[@doggfite]

I'm just interested in watching you talk about stuff, the way you pick apart topics is very interesting

[@inspector1794]

I'd be lying if I said I understood all of this as it is way beyond my level but, I learned something and was entertained a bit too. Thanks for the infotainment, I stayed till the end too.

[@FintaruS]

I love seeing this type of video, they are becoming rare on the youtubes

[@MyGrowthRings]

Very interesting, Matthias. I stuck with ya!

[@kstarler]

I made it to the end of a Matthias video and all I got was some sunspot activity. Thanks Matthias!

[@ecsyntric]

optics and magnetism were never my weak points

[@nelsondog100]

Even though it makes my brain hurt, I love watching the way this guy exercises his mind.

[@AySz88]

2:15 About the accuracy of those, I notice it's a trial set for glasses. When used for vision correction, people also (generally) have the adjustable accommodation of the eye's lens to fine-tune focus, so a wide tolerance is fine for that purpose. Sort of rediscovering why adjustable focus is important.

[@quentinlynch]

That was very interesting! Thanks Matthias and greetings from the birthplace of Carl Zeiss!

[@DavidLindes]

I mean, I watch Huygens Optics videos, too, so... yeah, I'll for sure stay for this one. Been pondering what I'd do for eclipse viewing (and epiphenomenon viewing), too!

[@DavidtheSwarfer]

Many years ago (maybe 2000) we had an eclipse and though we had glasses and welding helmet etc to look with we had an accidental camera obscura that was very neat. The net curtain on the lounge window projected a thousand little images of the sun onto the floor, which made it very easy to see and all the kids could watch at the same time.

[@T0NGPU]

Watched to the end! As I kid i once stuffed grass into the container for my small collapsable telescope to stop it from rattling during "war games", and forgot about it. Mold grew inside and stained the lenses. I had to take it apart and clean it, forgetting in which order the lenses were placed. I had to build a simple optic table and keep swaping them to get the right combinantion. It was lots of fun, and this video brought back my memories :D

[@meeponinthbit3466]

Of course we watch to the end. You do all the cool stuff we don't have the time to mess with.

[@musthavechannel5262]

A bit satisfying to know that I'm not the only one doing during these optics videos.

[@BlairScouten]

This video is of particular interest to me for my plans for the eclipse! I have large set of binoculars that I plan to use to do what you’re doing in this video. Unfortunately, it has been cloudy each day around the time the eclipse will actually happen. Here’s hoping for clear skies this weekend when I’ll have much more time to experiment!

[@tiranul86]

Whatever you're explaining I'm gonna watch to the end 'cause you do a great job of it

[@HarmanRobotics]

Decades ago, in bootcamp, when we were standing in line waiting for (something), there was a partial solar eclipse. We saw all these crescent shaped spots on the ground of various sizes as the Sun filtered through the trees. We soon discovered that simply using your hand to create a pinhole was enough to project an image of the eclipse on the ground. While I do believe a lens system will give a sharper image, you certainly don't need a lens to watch the eclipse. When you do view the eclipse I hope you make a comparison to a simple hole in a piece of cardboard projecting the image of the Sun.

[@hipjazzbone]

I love the optics videos. I miss making tools, but I love the optics videos.

[@basapon7074]

I like the optics videos, I'm just waiting for you to make a wooden lens

[@skeleton_craftGaming]

I wouldn't be surprised if similar experiments are what led to the invention of a variable focal length lenses...

[@Squibbleses]

Very cool. We're planning to go up to Miramichi to see the eclipse. Hopefully the weather is good enough to actually see it!

[@JeffGeerling]

At what point are you going to start grinding your own precise lenses and building a new camera system?

[@chriscardwell3495]

Matthias - thanks for the video . . . it is a fascinating subject. Also my dad, nearly 93, refuses to try new glasses - even though I could give him a series of glasses to try for free. Not rockert science but being able to see, does transform our lives. Thanks for another *Optician Training* video 🙂

[@ophello]

Just swap the lenses without him knowing.

[@jcKobeh]

I'm new here, but this is fascinating. If there are more optics videos I will watch them to the end

[@JustinRoffMarsh]

The optics lesson is more interesting than the eclipse itself!

[@vsavoldi]

Keep making videos you enjoy! As long as you are having a good time your audience will change with you. Just look at the changes in your content/situation in the last 4 years. It's been a ride and we are still here!

[@WikiSnapper]

That is fascinating! I really enjoy all your videos! Thank you. I did optics in a physics class in school, but we never used lenses to see what that stuff actually meant. I would like to take another optics class with lenses to see how it all works in real time. It's much more interesting when you can see the results.

[@dhivan]

I dont know how you seem to always release a video about something that is currently relevant to me specifically, and always its super interesting

[@clark7117]

Stay tuned... Matthias efficiently channels energy through a single focal lens, powering a 240V welder at 100% duty cycle, typical household appliances, and supplying electricity for a 3000-square-foot residence for a year.

[@thesilverfamily]

I watched the end because every time I watch your videos I learn something. It's not my area of expertise, but I love to learn

[@Argoon1981]

This was very cool and don't be afraid to make longer videos.

[@headshothero13]

I don't care what you post, Matthias. Your interests and curiosity is inspiring and very interesting to watch. I'd rather you make videos you care about on topics you're passionate about!

[@Lord_Void_Raven]

it's the same reason i randomly watch construction videos, no intention of building a house, but interesting none the less

[@jbh.6257]

You are the new Mr.Wizard, love all the science topics!

[@rlsimpso]

Sounds like a wooden optical table project would be a fun series.

[@pendarischneider]

Exactly. Maybe even the full proper three element zoom lens system using wood gears. For added points the lenses could be made from transparent wood. 😉 Of course, once that is done, the logical sponsor would be one offering mental health care.

[@JohnHarmon]

I have used a welding helmet. I don't know why they say it's unsafe but my eyes are just fine. I made sure to put it on a very dark setting

[@Eric-R]

Yes, I watched right to the end, waiting for the dawn of understanding. I could be here a while.

[@Sam_596]

I'm actually going to a wedding that is located in the path of totality for the eclipse. They're making the eclipse part of the celebration, so it should be pretty fun

[@sethjensen54]

I’m an optometrist. Optics is kind of my thing. I made contraptions like these in school all the time. Yes of course I watch to the end.

[@vaalrus]

When I was a kid, I would take a surveying transit to project the sun onto a sheet of paper so I could look at sun spots.

[@vegasguy73]

You explain optics better than any professor I've ever had!

[@justindesilets3526]

been woodworking for a while and just started doing astrophotography . so please continue those videos!!

[@toddatglencovewoodworks]

Thanks for putting things into focus Matthias! 😅😂😊

[@FrankGraffagnino]

i like seeing your passion for these, even i don't fully understand the physics of optics and such

[@MarkMcCluney]

I don't get it - some folks don't like optics? Surely folks tune into Matthias's vid because they want to learn something new. This seems like the ideal opportunity. Thanks for make me look up what 'dioptre' means.

[@jamesrosko]

Great topic! I made an eclipse viewer similar to yours a few years ago with an off the shelf spotting telescope. The thing you may run into during the eclipse is the sun moves and you may need to adjust your tripod and viewing angles throughout the eclipse.

[@tiagoferreira086]

PLEASE post a video when the eclipse happens! :) Probably a time lapse would be awesome.

[@DarthRelkew]

I just learned about Optics in Physics, it’s great to see it in action!

[@alexpettigrew583]

Made it to the end! I took lots of physics classes but I don't recall we ever covered optics in any detail.

[@andygardiner6526]

As always, when finances are not the size of government military budgets, in general the less glass in the light path the better the image. Although I have to admit to using Leica zoom eyepieces on my solar scopes which feel like I've spent military budgets! For white light work, a cheap, second-user, large refractor with a cheap glass eyepiece projecting onto a screen works quite well. If there are clouds of smoke, the lens is plastic! For direct viewing, a homemade solar film filter works well with a 99.995% light reduction ...

[@MazeFrame]

Fascinating project!

[@Paulman50]

Always watch all of your videos till the end.

[@codename48122]

I’m glad you make videos you want to make instead of just trying to appeal to the masses - Optics ARE interesting - the masses obviously don’t know good content when they see it!