Video experiment: Homemade PVC macro lens
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- Опубликовано: 14 апр 2016
- Here's some better footage that I captured after some practice:
• Honey bee macro footage
It's a close-up of some honeybees.
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Sorry, no link to the lens :( I bought it years ago, and I don't remember where. Specs to it are down below, though.
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As I mention in the annotation, twisting that gray ring on the barrel adjusts the zoom of this camera. The twist-zoom feature is not impeded by this lens modification. On the screen side, the camera also has a fine adjustment for the focus (for when focus is set to manual). These two features are what make the addition of a macro lens possible, because the zoom is really just an adjustment for the internal lenses' focal point distance- it just moves the outer most lens in and out.
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What follows are the dimensions for the magnification glasses used in the demonstration. All were biconvex, and I didn't go through the trouble to approximate their radius of curvature values. let t = lens thickness (how fat), and let w = diameter of lens circle (how wide). My grading scale was simply based on a visual inspection of glass quality; the correlation between higher quality and lens thickness was mostly incidental:
Cheap: t=6mm; w=90mm
Medium: t=11mm; w=75mm
High: t=18mm; w=65mm
Note: The lens setup in my camera uses an aspherical lens to reduce aberration. That is, (at least one) lens is shaped in a special curve that is not quite a sphere to reduce those stray, scattered light beams that cause spherical aberration. Typical focal range is between 0.3m and infinity. The numbers on the barrel are 11-27.5, but I don't know what that means. Sorry to make this all so complicated, but I told you that optics was hard as hell.
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The PVC was cut to the smallest possible size that would still prevent the lenses from contacting one another. Spherical aberration is quite apparent on the edges with this setup (notice the flower pot at around 8:20), and so I would posit that the lens I am using has a smaller spherical diameter (curvature) to its face than it should have (I'm suggesting that the lens should be made out of a bigger sphere, not that it should just be bigger in size). Those smaller but "fat" looking lenses really bend the light quickly, which makes it seem as though they have a powerful magnification, but this is not necessarily the case. What you may perceive as powerful lens could just be a lens with a close focal point. I suppose that what makes a lens "powerful," ultimately, is the amount of light that it can capture and focus; in other words, its size. My approach here was to use an extremely close focal point, but I think that I would like to move it back some. Please keep in mind that this was done on the fly, without research, without buying anything, and without making any calculations or preparations at all.
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The shots at the end are my first tries ever, so they are incredibly unpolished. But this fact should give a fair indication of just how much better this could work with a little practice, and perhaps with a better shaped lens. Nevertheless, this mod costs nothing- especially relative to those pricey add-on lenses, which (reduced aberration aside) would offer little improvement for my purposes. 
Хобби
its really a pleasant surprise to see you again :)
I know this video is old, but I hope if you do see this comment you get some interest out of it. I work in manufacturing, and I put together the nessecary parts to create little devices that doctors put in people's brains so they don't die of aneurysms. I get to sit down for 10 hours a day and look down a microscope. It only goes up to 40x magnification, but it's still utterly fascinating. I work in a clean room, so don't tell anybody, but I've sneaked everything from hair to skin to boogers onto my build plate (don't worry, I sanitized and rinsed it thoroughly). I spent nearly two hours earning my paycheck diligently by playing with my hair and eyelashes, and simply catalogueing information about them to see later. I even pulled out what I think was a nerve cell (it hurt a LOT) and got a decent look at it.
I hope you play with magnification and macro film more. It's a beautiful and fascinating world. Physics changes so much on the small scale... and the big scale, to be fair.
Just yesterday I got to view a sample I prepared under an electron microscope, magnification is awesome.
another awesome and interesting video, glad to see you putting these out more.
Another great learning video - love it !!
Awesome! You were able to get some great shots with it. Another excellent video.
I think one of the coolest shots was the bee near the end; everyone knows the approximate size of a bee. That really helps to get a sense of the scale. Even so it was a really neat shot regardless. Bravo!
Very cool idea. Love the creativity of your stuff man, keep it up. :)
That bug giving you the hairy eyeball around 8:30 - that made my Friday.
My favourite video of yours to date...
I tried this last night and actually found a really good combination.
I pulled the lens out of my cheap phone vr headset, which has fairly decent Lens material, and has a little tube attached to it already.
Then i took a magnifying glass and put that to the open end of the magnifying glass, and omg that really brought out the detail in the macro lens. It allowed much better depth of feild focus compared to ur average smartphone macro lens.
great project, wonderful video! thank you!
what do you think about using the same concepts to make a multi element lens for increased zoom? feasible?
Hey pocket, just thought I'd ask, could we get the link to the high quality lens you said you might buy more from online
Great video and highly enjoyable to watch. Do you happen to have a link to where you bought the highest magnifier?
Ha! I was just looking through my eBay feedback. Nope. I purchased a lot of perhaps a half-dozen or so of those, and this is the last one left. Let me know if you can find them!
Mr.Pocket thanks for sharing this information,this was like many of your videos very interesting and explained in great detail are you planning on covering this in other videos,all the best to you and yours
cool project! nice job.
I think that it's called "macro" when a lens/sensor relationship is capable of reproduction ratios of at least 1:1. Also I think it's named relative to "micro"-photography which is necessarily smaller.
i really needed to see this video. thanks
It's possible to make an octagon out of pvc with a camera mount in the center. Doing so removes the small shakes from holding the camera.
fantastic!!!
hell this is the best video on the interent
Great video! I have a visual disability and like to make things. Could you give me some specs on the lens you used there? I use magnifiers all the time and I'm always in search of decent ones, especially lens' I can build with. Thanks for sharing!
Awesome video. I've been doing some similar testing with my cell phone(lg v10) which has a very nice camera. Adding a "macro" lens to get some really close up shots of the life inside my terrarium. fascinating stuff. I have a Pentax k01...I'm curious if this would work on that camera as well...going to have to try it out. thank you for the inspiration.
dayum that lunch looks great
Watching after 5 years
really cool vid. I wonder, can those lenses be stacked somehow?
Hollywood, with all its tricks, special effects and CG can barely match that bug toward the end. Good video. Just found your channel after a call out from John Heiz.
Thanks! And it's just a cheap camera and a magnifying glass. Well, please check my other channel, too. This one is my second channel, but most of the good stuff is on my primary channel.
I've been watching your videos for a good part of the day( Both channels). They're fascinating. The last one was the push stick center of mass. Excellent. I'm 81 and I don't get out in my shop much anymore but it's fun to keep learning. By the way, are you a mathematician, physicist are what? Your approach to everything is so scientific and informative.
I really appreciate the support. I do have a science background, but at present I'm not employed in those fields. I don't ever want another lab job! I respect people who can do it, but it is far too tedious and linear for me. Again, thank you. It's great to hear that some people find these useful and/or interesting.
Even just looking at the glass of your best lens, it's obvious how much better it is. None of that lovely green that the plain-jane soda lime of the others explodes all over the bottom!
Almost looks like lead crystal, and as a materials science nerd who's well-trained in chemistry and physics would love to know more about it 😋
Optics made my head hurt the most, then quantum. Understand ehy newton started where he did. But the general interest of the public is so vital to keep these studies going. You are doing a vital task and should be congratulated! This is such a good way to do science education!
Very nice of you. As a rural recluse, it's become somewhat rare for me to encounter people who have been well-educated. Now, whenever I do, I'll often ask them which of the courses they've experienced was the toughest. As she was removing an embedded object from me, an ophthalmologist once responded to the question (without hesitation): "Oh, optics!"
As much as I appreciate your comment, my own contribution as an educator has been somewhat sparse. I try to add a drop here and there, but mostly attention's demand around here is for novelty. People like two things in this genre: 1) tricks, and 2) a reaffirmation of their present beliefs. The only way to _really_ do the vital work, shameful as it is for me to admit it, is to do it so that they don't know it's happening; make the idea simple enough in its explanation, and they'll think they knew it the whole time.
Kudos to the uploaders who are more direct, more explicit, in their educational content. Around this genre, Matthias Wandel is supreme. But as he's happy to point out, nobody watches his optics videos! But maybe that's because it's too dry. Tell me, fellow science mind, what _is_ purple, really? The more we quantify it with explanatory rigor, the more we become detached from the ineffable sensation of seeing it feather-fade to nothing on a dark wall opposite the prism on a sunny day. Rays and waves and aberration and perspective, maybe, are just too much for us to understand. Or maybe, as they're only parts, they add up to much less than understanding. Sometimes I wonder, in spite of my lifelong obsession with it, whether I've come to understand anything about geometry at all. Tough subject is an understatement! Thanks ;)
Did you figure out a way to stabilise the lens? Maybe some rubber gaskets will absorb the vibrations
Have you tried sticking a CD player lens to your phone camera? You can’t use your CD player any more but you do get a good microscope I just used sellotape. Thanks for your videos your are very inspiring.
How power magnify glass? superb
Nice video!
"The physics has always boggled my mind"
THE MIND BOGGLES!
I'm not sure if that was meant to be an AvE reference, but you both have great channels, and you also have a great secondary channel.
Also, you have some amazing camera skills. That lens you made also gives a cool effect towards the edges when zoomed out. Also, the depth of field, were you doing all of that, or was that partially a product of the lens's focal point?
awesome
The one u chose, is it convex? Or concave?
Random note: On the assumption that you're working on a teleportation device in your spare time (aren't we all), I would recommend you not experiment with it in your "green house". Judging from the video, you appear to have insects present there... and we all know the juxtaposition of insects and teleportation does not end well.
The effects have been greatly exzzzzzzzaggerated.
...coupled with the funniest comments!
+DrPortland that is some sage advice.
+DrPortland Damn brundleflies amirite?
where can I buy these lenses? Link please?
ohh.it's really nice..
" you'll never be able to un-see" 🤣🤣😂
I think the idea behind the word Macro is about making really small items "look" really big.
You could use the Lenses out of an old projection TV
The commentary is hilarious haha
It is called a macro lens because it make small things look big
oh man i wish u had a tripod 4 this one such a crisp shot 8:23
Did you see the gas bubbles in the drop of water? Photosynthesis at work?? Love your videos
I saw that! It was pretty cool. It's hard to imagine just how tiny those were.
The term "macrophotography" is definitely confusing. The best way to think about, at least traditionally, is how large the image of the object you are observing is projected on to your detector (e.g. CCD). When the lens you are using produces a ratio that is close to 1:1, the image projected of your object is essentially life size, and you are in the "macro" regime.
Mr. Pocket, look up Thomas Shahan. You would be interested in his home brew macro photography.
Request... More "just the tip."
Thank you, man.
You should put a penny next to what ever you are aiming the camera at for scale
8:25 i feel like there should be some death metal and a red overlay on the screen at this point
Sorry, i didn't pass the mirror test, shall i conclude that i have no conscience of myself ? :O
Someone that will actually talk, instead of play music, plus 1 min in and Im laughing.
The term micro is part of he metric prefixes
deci 1/10
centi 1/100
mili 1/1000
micro 1/1 000 000
nano 1/1 000 000 000
piko 1/1 000 000 000 000
femto 1/1 000 000 000 000 000
atto 1/1 000 000 000 000 000 000
In SI it goes even further.
macro is something that is visible to the human eye without any optical help. Therefore you need something like a micro-scope.
How do you determine the length of the PVC pipe?
+Rexus King Oh, you said it in the description.
+Rexus King 11-27.5 specifies the zoom range of the lens
Yes, but what are the units of measure?
The units are millimeters!
They are "focal lengths", I think it means the distance between the lens' focal point to the camera's sensor, but since I'm not so good at optics either, here's a link to Wikipedia:
en.wikipedia.org/wiki/Focal_length#In_photography
That doesn't seem right. The zoom only has a physical movement of around 4 mm, and the difference between those two numbers is 16.5. Thanks for helping though. I'll read some more about it later ;)
weird that it's called a trefoil when it's clearly a quatrefoil
maybe it's macrolens because it makes micro, well, macro
+bradleymoc This is, in fact, the actual reason (lenses are referred to by what they do, not the subjects they're used on). But I don't disagree with +pocket83, it's just these were all named well before our time, and getting a group of photographers to change is a pain in the ass.
Millions of likes for beginning
Did you have to get closer and closer as your lense got bigger? Your glue gun skills need some practice, lol Your DOF was great with that last lens. You just saved yourself a whole bunch of money. Way to go. Thats better than the filter set I bought, 1+ 10x and almost as good as my friends 2k $ Nikon macro lens. Where it really shows up is when you enlarge it later, how sharp it ends up. Good job.
I disagree, it was nowhere near a macro lens in quality. In magnification, mayhaps getting near 1:1, but magnification does not equate to quality, though this RUclipsr seemed to use "quality" that way. Also, probably better off improving your macro with extension tubes than by adding lenses to the front, also a very cheap way to go.
Nonsense. I'm surprised you petty camera snobs didn't get here earlier. First, an extension tube would allow dust in and ruin the thing within the first hour, on top of its inconvenience. Second, the supplemental lens provides quick, cheap, and replaceable protection for high-risk, tight shots. Third, the "quality" (no matter how you parse the term semantically), is phenomenal after some tinkering: go watch the honeybee footage. You should seriously consider MY application- and not just your own- when generalizing about what's "better off."
And finally, I'm an expert with a hot-glue gun. sheesh.
Hey I was teasing you about your glue gun mess..lol I think your invention was remarkable. Like I said it was comparable to the 2k lense, (we did a comparison during harvest w/ my mafnification filters) You can laugh all the way to the bank at the nay sayers. They have to justify spending 2k on a lense they only use once in a while. I want to make one
I know that. It's just that I film carpentry operations, not BBC Nature footage. My budget is 0, so I want some slack. Thanks ;)
pocket83² Sorry champ, but an extension tube isn't camera snobbery, it is the precisely the poor man's macro, sometimes they can be found cheaper than your PVC pipe+lens solution. The quality is preserved because you aren't adding any new elements. Point 1 is nonsense, that camera is not sealed to begin with so an extension tube isn't going to be letting much more dust in. I've used extension tubes in dust storms out in the desert, they're fine, if you're really worried then just add a rubber gasket to it (pretty much all most "weather sealed" lenses do anyway) 2 is fair. I'm not talking about some imaginary ephemeral "quality." I mean that as opposed to an extension tube you're harming your sharpness (measure MTF), increasing chromatic aberrations (measure CA width in pixels), distortion (measure curvature the lens is imparting to straight lines), etc... another nice way to get a macro is to reverse a fairly wide angle lens, but with modern lenses that are focus by wire the loss of electronic connection makes it a no go. The protection aspect is also iffy though, but I suppose the extra space from the PVC makes it an overall win there. But hey, it's not like I can't do camera snobbery if you want, go buy yourself a Canon MP-E 65 you pleb, 1:1 to 5:1 magnification :P Come on dude, it's not like I even told you to get a "real" macro lens or something. Your results are not bad if we consider only the very center frame though. I wasn't trying to put down your attempt at macro, just to suggest something that does preserve more quality, but yeah, it does not add to front element protection, but your dust argument really is bollocks. Can even make bellows on the cheap if you want.
U can clearly see his face if u look close enough;)
put it on a watch
Do the uses of pvc pipe know no bounds?
WHAT!?!?! HOW DID YOU TOUCH THE HOT GLUE AND NOT DIE???????
+Aiden .C A (insert science accident) gave him the power of indestructible skin!
DID IT ALSO GIVE HIM (insert super power)??????
itu adalah lensa macro, tapi kalau micro adalah untuk microscope
Micro is too small to be seen, If you can see it it's macro. not the most technical but it works. replace seen with experienced... better. or google it then.
Macro because enlarged image
f/31
i will never unsee what you look like if we ever do know/see ☆
you're cute and adorable, youre funny too. uwu
dolphiniee time stamp please, im curious
There is an image of pocket on the internet, buried in his google+.
There is an image of pocket on the internet, buried in his google+.
If it's that picture with _The Who_ flags in the background, that is not me. I have no idea why that is attached to my g+ page. He does sort of resemble me, though.
However, one of my eggs was a selfie. Escher-esque, with me holding a reflective ball. Reddit has it, or course. Look if you must.
I've always justified it as, the lens makes the little appear large. The micro, macro. Pretty terrible explanation, and I hope that's not why they named it that.
your funny know that?
1:18 the way he smashes the lens anybody else cringe?