This is a great video. Thinking about doing a similar multi-focal length/multi-f/stop pinhole for my Linhof 4x5. The focal lengths I'm considering for the 4x5 are 90mm, 150mm, and 300mm. I knew math would be a thing to know but you've explained it pretty f'ing well (even if I'll have to watch it multiple times to understand it!). Thanks and hope you're good.
Wow!! You've got an additional subscription although my brain wasn't finished with the math plug-in 😂 I can also follow the explanation. Very interesting as I am about to go out and shoot my Intrepid 4x5 with pinhole lens. Settings already plugged in the light meter, let see what comes out 🤙🏻🤙🏻
Great another good video, interesting subject. The aperture for the pinhole Intrepid sold me is f280. In lockdown here, hope not too bad in your neck of the woods.
Remember that the aperture F-number is based off of focal length. They say that that their 0.5mm diameter pinhole is best at 140mm, which makes it a f/280 aperture (F number = focal length/diameter). The optimal would actually be at 186mm which makes it an f/372 pinhole. In the video I round to 180mm f/360. Also in lockdown here, but that gives me more time to make videos. Thanks for commenting.
@11:50 get a ~$20-40 laser distance meter - will be VERY accurate vs a tape measure! (and fun! because “lasers”! 😁) They are also typically in meters and can change to feet/inches. I have the small Bosch GLM 15 / 20 (many cheap generic alternatives also online) which I keep in my camera bag and around the house! 👍 gives millimeter (1/1000 of a meter 0.000) precision... but actually just read accuracy +/- 2mm or 1/8 inch for some.
Fausto Saporito what is M??? I don’t think he mentioned all then variables... though I can recognize “f” as focal length, “lambda” and wavelength of (green) light, “d” diameter of pinhole.
Fausto Saporito what is M??? Ok @4:35 😁 “magnification” I don’t think he mentioned all then variables... though I can recognize “f” as focal length, “lambda” and wavelength of (green) light, “d” diameter of pinhole.
@bwvids I have an old video that goes over the full derivation of the formula here: czcams.com/video/n5W3qztO4os/video.html It's a little long, but it will go over all the variables and where the equations come from.
I'm going to try to make rooms into camera obscuras, testing with my living room and then continuing on travels using hotel rooms. If i use the formula for say a focal length of four meters (4000mm), I get a pinhole size of 2.3mm. Do you still think the formula is applicable for this?
I would say yes, as the formula is about diffraction at the pinhole (optimum pinhole size for maximum resolution). If you are fine with less resolution, you could always use a larger hole for more brightness; smaller sizes are not so cool, as they degrade resolution *and* diminish brightness (worst scenario ;-)).
Hi!! great video!!! a lot for experimenting... I wanted to ask your opinion, is it possible to obtain the same sharpnes a lens can produce? I believe it is not possible, but a fellow photographer told me it is, but wasn't able to support her statement... I've tried your formula and it has done a fine job for me, I use it a lot... in the other hand, I tried laser drilled pinholes but I end using the ones I make with acupuncture needles on aluminum foil... how has been your experience?? thanks!!!
A good lens will always be sharper than a pinhole, but a pinhole produces a rectilinear image where some lenses can have distortions. Check out this video of mine where I test the limits of sharpness with a pinhole and compare it to a lens: czcams.com/video/VPzAAzEb1wE/video.html
This is a sample, using M=1.5 and a light bulb. I am not very happy with focus, maybe the "do" setting was not perfect. My camera had an inclination towards to object, maybe this needs a change in the way how to measure the "do", maybe a cosine factor? Anyway this is the photo: flic.kr/p/2iRA9tH
This is a great video. Thinking about doing a similar multi-focal length/multi-f/stop pinhole for my Linhof 4x5. The focal lengths I'm considering for the 4x5 are 90mm, 150mm, and 300mm. I knew math would be a thing to know but you've explained it pretty f'ing well (even if I'll have to watch it multiple times to understand it!).
Thanks and hope you're good.
Wow!! You've got an additional subscription although my brain wasn't finished with the math plug-in 😂
I can also follow the explanation. Very interesting as I am about to go out and shoot my Intrepid 4x5 with pinhole lens. Settings already plugged in the light meter, let see what comes out 🤙🏻🤙🏻
Great video, please show us some of the pics you took.
I was going to supplest a episode on making a macro pinhole camera, but you pretty much covered it here.
Great another good video, interesting subject. The aperture for the pinhole Intrepid sold me is f280. In lockdown here, hope not too bad in your neck of the woods.
Remember that the aperture F-number is based off of focal length. They say that that their 0.5mm diameter pinhole is best at 140mm, which makes it a f/280 aperture (F number = focal length/diameter). The optimal would actually be at 186mm which makes it an f/372 pinhole. In the video I round to 180mm f/360.
Also in lockdown here, but that gives me more time to make videos. Thanks for commenting.
Ive often wondered how apertures with focal distances are calculated.
Thank you for this....... Really interesting :-)
Glad it was helpful!
@11:50 get a ~$20-40 laser distance meter - will be VERY accurate vs a tape measure! (and fun! because “lasers”! 😁)
They are also typically in meters and can change to feet/inches. I have the small Bosch GLM 15 / 20 (many cheap generic alternatives also online) which I keep in my camera bag and around the house! 👍 gives millimeter (1/1000 of a meter 0.000) precision... but actually just read accuracy +/- 2mm or 1/8 inch for some.
Good tip. Those laser measuring devices are pretty sweet.
Very very interesting. I am trying right now, with the same Intrepid, a M=1,5 with daylight is 2hr exposure with a ISO200 film.
Fausto Saporito what is M???
I don’t think he mentioned all then variables... though I can recognize “f” as focal length, “lambda” and wavelength of (green) light, “d” diameter of pinhole.
Fausto Saporito what is M???
Ok @4:35 😁 “magnification”
I don’t think he mentioned all then variables... though I can recognize “f” as focal length, “lambda” and wavelength of (green) light, “d” diameter of pinhole.
@bwvids I have an old video that goes over the full derivation of the formula here: czcams.com/video/n5W3qztO4os/video.html
It's a little long, but it will go over all the variables and where the equations come from.
Great one! love to hear about pinhole cameras! Are you going to release some vid. about solarigraphy in the future? :)
I haven't done any serious solarigraphy yet, but it's definitely on my project list. When I do it I will definitely make videos about it!
I'm going to try to make rooms into camera obscuras, testing with my living room and then continuing on travels using hotel rooms. If i use the formula for say a focal length of four meters (4000mm), I get a pinhole size of 2.3mm. Do you still think the formula is applicable for this?
I would say yes, as the formula is about diffraction at the pinhole (optimum pinhole size for maximum resolution). If you are fine with less resolution, you could always use a larger hole for more brightness; smaller sizes are not so cool, as they degrade resolution *and* diminish brightness (worst scenario ;-)).
Hi!! great video!!! a lot for experimenting... I wanted to ask your opinion, is it possible to obtain the same sharpnes a lens can produce? I believe it is not possible, but a fellow photographer told me it is, but wasn't able to support her statement... I've tried your formula and it has done a fine job for me, I use it a lot... in the other hand, I tried laser drilled pinholes but I end using the ones I make with acupuncture needles on aluminum foil... how has been your experience?? thanks!!!
A good lens will always be sharper than a pinhole, but a pinhole produces a rectilinear image where some lenses can have distortions. Check out this video of mine where I test the limits of sharpness with a pinhole and compare it to a lens: czcams.com/video/VPzAAzEb1wE/video.html
This is a sample, using M=1.5 and a light bulb. I am not very happy with focus, maybe the "do" setting was not perfect. My camera had an inclination towards to object, maybe this needs a change in the way how to measure the "do", maybe a cosine factor? Anyway this is the photo: flic.kr/p/2iRA9tH
Please take some example pictures.
I will in future videos. Stay tuned!
The girl told me, "Take off your jacket"
I said, "Babes, man's not hot"
I'm glad someone got the reference!
@@TheScienceofPhotography Haha, wonderful reference!😆
I stop when I see 2+2=4-1=3 --'
No, I don't stop, but.... :P
quick maths
what you talking about? keep it simple