In this week's episode Mark Wallace explains the Inverse Square law and how it can improve your photography.
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@Ladywrip6 жыл бұрын
Peter Hurley's explanation of the inverse square law confused the hell out of me... Mark's teaching of it was so simplified I grasped the concept and technique of it almost instantly. Thank you KZfaq for making it possible for me to CHOOSE my photography instructors, and thank you Mark for making this complicated thing so simple:-).
@lilblingking14916 жыл бұрын
KZfaq University is the best haha
@sg3-h7u5 жыл бұрын
Agreed!
@MomentphotographyCoUk12 жыл бұрын
Mark, I can't tell you how thankful I am for you and your team for these videos!!! I am a professional wedding photographer, but I only got into studio photography last year and these videos are absolutely fantastic. Such friendly teaching and so well edited and easy to understand. The videos have really enriched my photography experience, given me more confidence and brought new enthusiasm to try out different things. Thank you so very much!
@billleontaritis76389 жыл бұрын
by far the best explanation of the inverse square law. thank you. your a fantastic instructor.
@TheYFlyer12 жыл бұрын
Excellent, excellent video. I was aware of the inverse square law however seeing your demonstrations really help clarify it. Thanks so much for doing this series and thanks to Adorama for sponsoring it.
@extacci13 жыл бұрын
You're the best Mark! This video is really helpful. You make inverse square law very easy to understand.
@CharlesBecket11 жыл бұрын
Mark, in my many years of photography, this is the best explanation *PLUS* practical application and demonstration of falloff I have ever seen. Great video! Thank you!
@jitu75713 жыл бұрын
Mark, this has got the be the best tutorial of all the series. Thanks so much for breaking it down with examples because it really made it easy to understand the concept. Thank you very much!!!
@twicebittenthasme55455 жыл бұрын
As an artist, I found this quite informative. I may not use fixtures to achieve a specific focus, but the light on my subject must follow the same "law" if I wish to achieve a desired effect. Nice job explaining this and showing exactly what to expect. Thank you and your lovely model for explaining, posing in position and for sharing this!
@prestonlhouse11 жыл бұрын
Wow! That was the clearest explaination and example of the inverse square law I'v ever seen! Bravo to you Mark!
@nstarbill12 жыл бұрын
Great job, Mark! Clear, concise and wonderful examples.
@WarrenAckary13 жыл бұрын
Mark.. this is unreal.. Ive learnt more in 3 episodes than in 4 weeks of photography Class! Brilliant
@Mr550d12 жыл бұрын
this is the simplest and important class i have witnessed.
@RichardAltenburg11 жыл бұрын
Even though I knew this theory for years, I am amazed to find that often I struggle with light and totally forget about this important inverse square law concept. Thanks for making this great video to remind me once more!
@ramadaxl8 жыл бұрын
I'm a photographer with a lot of years behind me ( over fifty years in fact) , and I used to manage a photo lab in Blackheath village in South east London. I had occasion to try and explain to a customer exactly why his photos taken at a concert hadn't come out as well as he expected. He'd shot some images of the stage from around 50 to 75 yards back, naturally the images ( of the people on stage ) were not very good since he was only using a compact camera. The problem came when trying to explain why the flashgun was not powerful enough....after several attempts at explaining and drawing diagrams ( none of which worked ) I asked him (politely) what his mathematical ability was like. "I'm a professor of mathematics...its what I do" was the answer. I turned and gave him a little smile , 'Inverse square law, the power of the flash diminishes over the square of the distance'. Only to get the reply "Why didn't you say that in the first place"! Then he realised what he said and burst out laughing.
@BrGr3858 жыл бұрын
+Ian Campbell-Harris What's embarrassing is that a math professor needed someone to explain him how light works....
@weboo1513 жыл бұрын
and you can see that there is a difference 11:19 ---just messin around!!!! great job mark!
@fcoizq13 жыл бұрын
WOW! Mark you are the best!!! tou explain this so well... keep up the great work man!!!
@cockerspanielhome12 жыл бұрын
Mark, Thank you sir for your very informative video, I find you very easy to understand. I really appreciate all your efforts in making these videos and I look forward to watching all of them. I definitely will consider making my next purchase from your store. I have already learned a lot from you, I thought I knew a lot about photography before but these vids show me how much I need to learn. Thank you, Eric
@sg3-h7u5 жыл бұрын
wow he always explains things so clearly! I always learn much from his tutorials!
@hugdeez13 жыл бұрын
Best explanation I've seen so far.
@urvashisthakur11 жыл бұрын
I am just starting out my professional photography and THANK YOU Mark :D You are a fantastic teacher and I look forward to more video's from you.
@insightvideo61365 жыл бұрын
Wow - these Mark Wallace videos are some of the most informational and helpful videos on photography you can find. Thanks Mark! Thanks Adorama TV! Subscribed!
@Ketandh12 жыл бұрын
hi Mark this is the best thing i came to know really great , earlier i was bit confused with this Inverse square law but u made us understand with real life examples WOW AND THANKS HATS OFF
@AndyCrawford12 жыл бұрын
Thanks, Mark. I've been reading up on it, but seeing it in action just cleared up the entire theory!
@uldistube13 жыл бұрын
Ideal episode! Thanks, Mark!!!
@MichaelChowMedia10 жыл бұрын
one of the most informative videos ive watched in quite some time.. model and photos are beautiful.
@clarencenewby7166 жыл бұрын
Best explanation so far.
@mzahid9i9 жыл бұрын
Great explanation of Inverse Square Law and awesome video with scenarios. Thanks!
@hamidsheibani80795 жыл бұрын
Mark your videos are amazing man. Thanks a lot
@vanhellcng13 жыл бұрын
ur the man, mark, very informative, can`t wait for the vid. thanks.
@PhilipLeichauer2 жыл бұрын
A complication to the inverse square law is that it is only totally true for point sources of light. Close to a large softbox, moving from 1 cm away to 4 cm away will not reduce the exposure by a factor of 16 - it'll be pretty constant. This deviation from the inverse square law will remain prominent until you're about 1 diameter of the softbox away from it. After that, it'll start to behave itself more. Perhaps a better way to put that is: The light from a softbox is fairly constant brightness out to about half its diameter, and once you're beyond about 2 diameters the inverse square law will hold well. While in between the light will blend between the constant high brightness and the inverse fall off. And to complicate things - this is for direct on-axis use of the box. For a more glancing pass of the box's output, the inverse effect will start to kick in a little earlier. If you buy me a beer, I'll write out all the equations. But nobody even vaguely sane would want to read them :)
@padlockd13 жыл бұрын
Thank you Mark! I don't even have a flash yet, but I do have a reflector (got it after seeing your vid on that) and I can't wait to try this out!
@vertusmatjaz13 жыл бұрын
i am already subscribed best tv in world... mark is the best!
@youmantube200913 жыл бұрын
Great stuff! I really learn a lot! Thanks Mark!!!
@kirankhedkar86810 жыл бұрын
I love the way u explain the things in easier way.. thanks tons!!
@catgasoline12 жыл бұрын
Excellent and useful tip to make the best of a simple light setup
@Fetor13 жыл бұрын
Learning has occurred. Great video!
@bloddynose1312 жыл бұрын
Right. area follows rules of square. If we were measuring volume we would be looking at cubed math and really make things complicated. I like it!
@popaddict13 жыл бұрын
Man, I always learn so much from the videos on this channel! Thanks for these videos. Really appreciate the clear explanations :)
@wdjgalvao11 жыл бұрын
WHAT WAS GOING TO BE OUR LIVES WITHOUT MARK WALLACE??? " NOW, WHAT I'M GONNA DO IS..." LOL :) THANK YOU VERY MUCH MARK!!!
@simplelife189210 жыл бұрын
This is useful and good info video. Thank you so much for sharing Mark
@kamalmerai13 жыл бұрын
That's the simplest i've seen it put.. thanks Markorama!
@iliassakalak10 жыл бұрын
Thanks a lot Mark! Quite clear explanation!
@damohart69099 жыл бұрын
Great explanation Mark, thanks
@paulbroderick84386 жыл бұрын
Thank you so much for your very comprehensive explanation practical demonstration.
@supervf113 жыл бұрын
Very interesting Mark, it's good to know how it actually works
@atephoto12 жыл бұрын
Your going to have severe shadows on the background if you place the subject(s) to near the background, and the light far away from both. The lightsource has become smaller, therefore you get a hard light, when you need a soft light. The best tip is to have a main light (for the subject), rim light for the hair and partly separation, and a background light for the separation it self.
@larryp858 жыл бұрын
lol i love youtube for these past 6 months i have been getting a free education in photography.
@rodneyNIKON12 жыл бұрын
Thanks for such a clear explanation!!!
@klaus2542 жыл бұрын
This helped me. Free education, people pay for this.
@MrMikeCanon13 жыл бұрын
Mark you rock!
@pijd8 жыл бұрын
Very nice way of explaining concepts Mark!
@rickywhite14848 жыл бұрын
Thanks Mark for this video
@albertsemelmann8388 жыл бұрын
Very nicely done video. One suggestion... always put the neck strap around your neck. I learned the hard way when I let my boss use my camera. He didn't have the neck strap around his neck, and the camera fell to the floor. The pentaprism shifted- cost to fix, $225! Lesson learned. (He graciously paid for it!)
@janekgreen13 жыл бұрын
This one was very interesting. Thanks for the great explanation, Mark!
@EntropiaMusic12 жыл бұрын
Very helpful! Thank you Mark!
@vertusmatjaz13 жыл бұрын
thank you God 4 Mark !!!
@CaptainChromaKey13 жыл бұрын
As brilliant as always! thx
@JoeShitTheRagMan_GravelGurdy10 жыл бұрын
amazing video. super easy to understand!
@GlennJanssen13 жыл бұрын
awesome video, once again!
@EVAn18213 жыл бұрын
Sam you are great !!
@LifeWithOme13 жыл бұрын
sam look nicer in this hair cut than longer hair ,she is so cute
@krishany975710 жыл бұрын
Great! Thanks to you I understand this clearly!
@plasticvideo12 жыл бұрын
This was incredibly helpful. Thanks Mark!
@henrymach13 жыл бұрын
Great explanation and demonstration. And I'm in love with Sam
@Sinwori13 жыл бұрын
please continue the great work. most photographers would charge money for videos like this.
@DVL150713 жыл бұрын
wow you are really good at explaining mark well done :D keep up the good work
@Claggy13 жыл бұрын
Great video... I'd never heard of this. Now I know. :) Also, Sam got a haircut! It looks great! I'm surprised no one else has said anything about it yet, haha.
@EdwardBliffin11 жыл бұрын
This helped me write a discussion paper I had in Business math about fomulas..Thanks
@jaideepsinghsidhu12 жыл бұрын
Loved it!
@josephchan4198 Жыл бұрын
Awesome instructor.
@Solarfactor13 жыл бұрын
Fantastic video.
@GianpaoloLaPaglia13 жыл бұрын
Thank you very much, very clear!!
@halshazly11 жыл бұрын
great and informative video Mark. I was wondering if you can share with us the settings for the shots, unless you have a video that talks about that in details. Thanks and look forward to more videos
@joaopauloribeiro57429 жыл бұрын
Thank you so much for this video, an amazing explanation.
@global00112 жыл бұрын
@epos85 It depends on the size of the light source. If for example you use a huge Octobox as in this video & the subjects 20 feet away & close to the background the light will be soft & cause no shadows. See Marks other video Ep 64 where he demonstrates it.
@lifeartpixels12 жыл бұрын
very interesting, you do a good job in explaining too
@raykhaled70136 жыл бұрын
Beautiful sam
@SariBarazi10 жыл бұрын
Fantastic!! Many thanks
@DrRaghavanRPanicker6 жыл бұрын
Sir,A good tutorial. Thanking you.
@oscarcll13 жыл бұрын
Imagine a sphere of radius 1 foot around the light source, and compare that to a bigger sphere of radius 2 feet. The surface area of the bigger sphere is not twice, but four times the smaller sphere (because the area is proportional to the square of the radius). So each unit area in the bigger sphere is absorbing only 1/4 of light as that in the smaller sphere. Hence the inverse square law.
@Mr.Anderson_13 жыл бұрын
good job, really well done.
@JaesarDunaGella12 жыл бұрын
If only you were there to tutor me through Algebra 2 last year ;( Seriously, you're an amazing math teacher hahah
@swapnilhitman13 жыл бұрын
thank you ... was very very clear..
@ejphoto13 жыл бұрын
I like Sam's short hair style!
@tabber0513 жыл бұрын
Great demo. Thanks
@MSTUDIO_SA13 жыл бұрын
very very very useful vid ....thanks so much
@RichardAltenburg11 жыл бұрын
It works even with no metric system at all: double the distance, and you get 1/4 (inverse of 2 x 2) the light intensity, triple the distance, and you get 1/9 (inverse of 3 x 3) the light intensity, and so on...
@StanleyParrishJr11 жыл бұрын
Thanks for making this video!
@myJTP13 жыл бұрын
Great info thanks!
@majorkriger9 жыл бұрын
Many Thanks!!
@luizbueno56616 жыл бұрын
this was so helpful! tks
@zafariqbal-js7tn7 жыл бұрын
very well explained thank you Sam
@ny1fanta13 жыл бұрын
been waiting for a week for you to upload this episode, you should do one on one twice a week =]
@AstrologerKennediGopalan2 жыл бұрын
Awesome!!
@marloon8813 жыл бұрын
Well done!!!! :)
@collincourtois85877 жыл бұрын
Hello Mark. I have a question about the inverse square law. I get that the intensity of light from a light source varies according to that law but what I don't get is why, seemingly, the light from the subject does NOT. I.e. the camera can move closer to or away from the subject and yet the exposure will remain perfectly adjusted and balanced. What am I missing here ??? Thanks for all your great videos.
@EE-cc5bd5 жыл бұрын
Hi Collin, CGI guy here. At constant FOV, when you go half way toward your subject, the quantity of light received from the subject quadruples but its area size on your sensor/image too.. so that the light per unit area remains the same ;)
@booshveg13 жыл бұрын
great job man
@yowu744613 жыл бұрын
awesome!!!
@simonmatthews275610 жыл бұрын
I learnt something! Great video, thanks :-)
@MrEvanrich11 жыл бұрын
No it would be different because light behaves in a different state in countries that do not use feet. Does this make sense?