The misconceptions about DEPTH OF FIELD 

When I take off my -5 glasses I see a silky smooth creamy BOKEH which can be replicated only with some serious L glass.

You've added a new way of visualising DOF for me. Very clear!

I had already read about this on a book called "The photography bible" by Michael Freeman. But your diagram of the lines really helped me to understand it better, so thanks for that one 👍

This helps me a lot mate thankyou - I use a 70-200 2.8 for aviation night photography and can't get over how I can take a photo at 2.8 and have it in focus

I already knew how it worked, but this explaination is just godlike

You’re the only person who explains things that shows clear understanding of what you’re talking about.

Yes! Depth of focus makes it easier! kinda difficult to explain 100mm @f2.8 is has shallow DOF than a 20mm @f2.8 With a massive DOF, both on 5 meters focusing range

Very well explained and visualisations help a lot as well. Thanks Dave!

Awesome video, simplifies and clarify's allot for me!

Great explanation, thank you!

Another great video, delighted I found your channel.

Brilliantly explained, thank you!!!

Nice vid. Takes me back to the 70's when I was reading all this in books and mags. Keep up the good work, like your style.

Great explanation. Saved it so I can refer to it again.

Super explanation!

this is amazing

That was just a remake of the Gerald Undone video. Will be good that you remake your video where you was testing full frame vs APSC, and don’t forget to take in consideration the ISO equivalence between FF and APSC

I’d like to see a part two! The problem I see people having is saying things like “f/4 is f/4 is f/4...sensor doesn’t matter, etc”. But what people don’t seem to get is while the ratio is the same regardless of sensor the physical size of the sensor makes a big difference. So F4 on my full frame is going to give me a different look in terms of DOf, out of focus area, etc. with EQUIVALENT focal distance on my mft camera. The only way a mft camera can match dof of a FF camera is to use a lens with half the focal length AND double the aperture. Or am I totally wrong?

A very good explanation - the best description I have seen on this. You need to do a part 2 to induce the concept of infinity focus with would then lead on quite nicely to hyper-focal focusing.

Suggestion: One thing that’s missing sorely is how to practically choose fstops creatively and effectively for dramatic focal effect given different typical shooting scenarios and different subjects. Ie Yes I know how to get shallow vs deep. But how to choose one that’s appropriately in between for the subject or mood? What to choose for rapid fire candid manual shooting which doesn’t spoil the photo from being too out of focus while not being too prosaically in focus. Where’s the sweet spot? Are there different schools of thought? What to choose for wispy ethereal landscapes. Is it just experience experience experience? Is there a shortcut or some rules of thumb with some justification. That’s the advanced driving course that’s missing sorely.

Came for the DoF rant; stayed for the Starfleet uniform hanging on the back of the door 😘

Thanks for this... Too many people have been sold on the idea that they need FF to get shallow depth of field

Nothing new for me, having seen Gerald Undone's videos, but it's good to see more videos getting good information out there.

Super nice video. Subscribed :D

Thanks Dave, very clear idea about the depth of field. One thing, I'm wondering about the factors that effect on the DOF, is how about the pixel size on a image sensor. If the size of pixel is shrink to quarter of other camera sensor (means each side is half), the image information slightly away from the exact focus point would be projected on four pixels in the camera when other factors are identical, I think. Then the image would look blur, unlikely the exact focus point still sharply stay in one pixel. How do you think? Thanks.

Nothing new but good explanation

Sensor size has nothing to do with DOF. Nothing. Imagine you cut the top half of the camera off. Now you can see the lens > aperture > sensor. The lens casts an image through the aperture onto the sensor. Replace the sensor with any size you want. And the only thing that changes is the field of view. That is, the amount of the image captured by the sensor. A larger sensor captures more of the image. A smaller sensor captures less of the image. The virtual image created by the lens does not change. The DOF within the image created by the lens does not change.

Getting an ef to efm speedbooster how would other lenses non ef go on it if fit the mount?

Nice explanation. There was a couple things in there I hadn't seen visualised before so it was fun to see. Going off on a slight tangent - I recently tried a panorama to emphasise the DoF and got an interesting effect on tarmac. The DoF showed up as a darker line (because it's sharper) and looks like someone painted a line there. It's fun to see where the focus plane intersects the scene of a wide angle: www.flickr.com/photos/eddnoble/43376751011

It would be better McKeggan if there is a scientific way of understanding focus. No ,there is no exact pixel shift in depth or how our eyes works.If there are ,please tell me. It is a matter of t=2Nc(v/f).

That is weird i think what yr saying is 300 mm is 300 mm on ff or apsc but the focal appearance is different that’s out their with Pluto or eye tricks the 300 apsc looks closer an optical illusion because of crop

5 minutes of applause! Thank you for the amazing explanation 👍🏻

TheBokeBros would have something to say about that pronunication..

Why only 1188 views on this brilliant video? You must find a beautiful partner, like Tony Northrup!

A couple of years ago I learn about this from this video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-34jkJoN8qOI.html He has videos for S-stop and ISO, and the rest are just family stuff for the most part (So is not your competition in youtube). Most of his subscribers are there because of those three videos. You should take a look, is really good. I especially love the F-stop video one.

i recommend you to start a account on gurushots.com, it is a nice platform where you can share images and compete in challanges. absolutley fantastic website ;) i would love to see you start some challanges in there, would also be great to draw more attention.

If you're not you should be teaching. Also you ought to write a book about photography.

4 people are out of focus...