Last year I created a plastic version of the quick disc, and am in the (slow) process of making a video about it - what a coincidence, that you mention the original quick disc in this video! For a long time I thought, that it is obsolete, but the resurgence of film photography over the last years, made me think about the quick disc again!
There's also the f-stop method, where the lens focal length represents the baseline f-stop, and the bellows extension represents the delta f-stop. In your example at the 15:55 mark, your 210mm lens would be f/21 and the 457mm bellows length would be f/45, which is a difference of just over 2 stops. It's not difficult to find or make a chart of the less common f-stop numbers and their relationships to the ones we're accustomed to seeing on our lenses. I suppose it's a close-enough-for-government-work logarithmic approximation. Thanks for the videos. You look a bit like Alex Honnold's fun uncle.
Hi, I love your Chanel and your videos! I would like to share a really simple rule of thumb someone shared with me. The Guy I have the rule from has been into photography for decades and teaches courses. I know him from a analog photo project at a local public school. The Rule isnt about beeing acurate but for beeing simple and to be able to guess the correct factor. If the size of the area in the picture is 10 times larger then the negative size, the time is corrected by 1 stop. If the size of the area in the picture is about the same as the negative size, the time is corrected by 2 stops. Every thing in Between is guessed. So if shoot 4x5 and the picture area is about 40x50" I would add 1 stop. If I shoot Macro, and the area is about 4x5 on my 4x5 Kamera I would adjust the time by 2 stops. The nice thing is, it can also be adjusted for different film sizes, if I use a 6x7 back to shoot medium format, I can just use 60x70 and 6x7 as the Area. Its not a Perfect solution, and some guesswork is involved, but its quick and easy for when I'm in the field.
thanks Tony, a great explanation of the concept, and tools to use to use; fyi sinar had a "pen" style quick disk system that not only did this, but calculated macro magnification at the same time.
Tony, good job! I love your humorous presentation style. You are able to simplify complex tech. problems for "ordinary Joe's" understanding. Have you ever considere commercializing your skill set through a recorded online masterclass in large format photography?
My Prefered Method to use a tape measure using inches. Lets assume you know the common f/stop numbers F4, 5.6, 8, 11, 16, 22, 32, 44, 64 etc... 1. Convert your lens into inches. (i.e. 11.8 inches. I would tell myself 11 inches and a bit - no need to be percise) 2. Measure my bellows (i.e 21 inches.) 3. Use the inches to measure the differences in stops. about for the 11.8 inches and 21 inches, it is about a stop and a half. I use a stop and a half of exposure compensation. If I don't mind over exposing, I might just increase it by 1 stop. Question: Is there a way to we calculate the maximum possible bellows length? i.e How do we get the smallest subject to lens distance? And based on lens to subject distance, how do I calculate the length of the bellows?
Thanks for sharing your clever way of determining BEF! In my experience, you can get the lens really close to the subject, within just a few inches. The limitation will be the amount of bellows your camera has. There probably is a formula for determining what you are asking but I am not aware of it. Sorry. Thanks for watching!
@@tonysantophotography Tony, sorry but I assumed that you spoke my language... Anyway, I was asking from which zone/city are your parents from? I'm from the Capital, Lisboa...
Screw all the math, Tony, where'd ya get that Swedish Road Runner? I'll trade you for a regular chicken.... I'll carve and paint it custom, ya shore ya betchya.
Tony thank you very much, excellent tutorial,great contribute for the community of Large Format Photography!!!!!
Thanks Nat! I appreciate your continued support!😎
Last year I created a plastic version of the quick disc, and am in the (slow) process of making a video about it - what a coincidence, that you mention the original quick disc in this video! For a long time I thought, that it is obsolete, but the resurgence of film photography over the last years, made me think about the quick disc again!
Wow! How cool! It’s great to have you here Philipp! The creator of the Quick Disc! It’s an honor. Thank you for taking the time to watch! 😎
THX a lot for sharing this ...
You are very welcome! Thanks for your support . 😎
There's also the f-stop method, where the lens focal length represents the baseline f-stop, and the bellows extension represents the delta f-stop. In your example at the 15:55 mark, your 210mm lens would be f/21 and the 457mm bellows length would be f/45, which is a difference of just over 2 stops. It's not difficult to find or make a chart of the less common f-stop numbers and their relationships to the ones we're accustomed to seeing on our lenses. I suppose it's a close-enough-for-government-work logarithmic approximation.
Thanks for the videos. You look a bit like Alex Honnold's fun uncle.
Thanks for sharing! I wasn’t aware of that method. I”ll have to take it for a test drive. Thanks for your support!😎
using inches instead of mm will be easier to figure out the f-stop relationship :)
Hi, I love your Chanel and your videos! I would like to share a really simple rule of thumb someone shared with me. The Guy I have the rule from has been into photography for decades and teaches courses. I know him from a analog photo project at a local public school. The Rule isnt about beeing acurate but for beeing simple and to be able to guess the correct factor.
If the size of the area in the picture is 10 times larger then the negative size, the time is corrected by 1 stop.
If the size of the area in the picture is about the same as the negative size, the time is corrected by 2 stops.
Every thing in Between is guessed.
So if shoot 4x5 and the picture area is about 40x50" I would add 1 stop. If I shoot Macro, and the area is about 4x5 on my 4x5 Kamera I would adjust the time by 2 stops.
The nice thing is, it can also be adjusted for different film sizes, if I use a 6x7 back to shoot medium format, I can just use 60x70 and 6x7 as the Area.
Its not a Perfect solution, and some guesswork is involved, but its quick and easy for when I'm in the field.
Thank you for sharing that technique with our community! Very interesting. I appreciate the kind words and your support! Happy shooting.😎
thanks Tony, a great explanation of the concept, and tools to use to use; fyi sinar had a "pen" style quick disk system that not only did this, but calculated macro magnification at the same time.
Thanks Andy! That’s good to know. I’ll have to search for one. Thanks for your continued support. 😎
Thank you
You are most welcome! Thanks for watching!😎
Tony, good job! I love your humorous presentation style. You are able to simplify complex tech. problems for "ordinary Joe's" understanding. Have you ever considere commercializing your skill set through a recorded online masterclass in large format photography?
Thanks John! I appreciate your support! 😃
Thank you for making these videos Tony.
My pleasure! I appreciate you taking the time to watch!😎
My Prefered Method to use a tape measure using inches. Lets assume you know the common f/stop numbers F4, 5.6, 8, 11, 16, 22, 32, 44, 64 etc...
1. Convert your lens into inches. (i.e. 11.8 inches. I would tell myself 11 inches and a bit - no need to be percise)
2. Measure my bellows (i.e 21 inches.)
3. Use the inches to measure the differences in stops. about for the 11.8 inches and 21 inches, it is about a stop and a half. I use a stop and a half of exposure compensation. If I don't mind over exposing, I might just increase it by 1 stop.
Question:
Is there a way to we calculate the maximum possible bellows length? i.e How do we get the smallest subject to lens distance? And based on lens to subject distance, how do I calculate the length of the bellows?
Thanks for sharing your clever way of determining BEF! In my experience, you can get the lens really close to the subject, within just a few inches. The limitation will be the amount of bellows your camera has. There probably is a formula for determining what you are asking but I am not aware of it. Sorry. Thanks for watching!
I always have a metric ribbon with me. After this video, I wont need any app anymore. It's easy actually.
Glad to hear it! Thanks for taking the time to watch! 😎
I have a question: why did you use a Portuguese rooster ( Galo de Barcelos) in the shot? Are you Portuguese?
Paulo, Sim. os meus pais são de Portugal. Thanks for watching!
@@tonysantophotography Fazes bem rapaz! De que zona são eles?
@@tonysantophotography Tony, sorry but I assumed that you spoke my language... Anyway, I was asking from which zone/city are your parents from? I'm from the Capital, Lisboa...
@@paulodefeyter Obrigado! Sao da Beira Alta. 😀
@@paulodefeyter I grew up speaking both languages. Where part of Portugal are you located?
Screw all the math, Tony, where'd ya get that Swedish Road Runner? I'll trade you for a regular chicken.... I'll carve and paint it custom, ya shore ya betchya.
LOL!😂 I appreciate your support! 😎