Why is exposure so confusing? (Page 13): Hey, watch yer language. Stibs? In public? My left brain side says thanks for the fun OP.

Red in Colorado

Bipod wrote:

True enough. Just imagine the cost of everyone ... (show quote)

Hey, watch yer language. Stibs? In public?
My left brain side says thanks for the fun OP.

Red in Colorado

I am really curious. Why do people not move on from this particular discussion rather than threaten to leave the entire forum? A threat like that would only be useful if it didn't sound like the new kid coming to the game in progress and saying this, "you won't play by my rules, so I am going home". The threat has no force.
Also, the bitching about a math discussion is just... small.
Maybe my comment belongs in the cc section.

Red in Colorado

BebuLamar wrote:

I do noticed because I am more familiar with the decimal system. I had to write a program for my programmable calculator to do math with those fractions.

Geez. I am nowhere near that. Lol.

Bobby Howard

I recently read an interesting article concerning “f stops” and shutter speeds. I am a believer in the KISS Principal”: Keep It Simple, Stupid.
The combination of “f stop” ( size of the aperture ) and shutter speed ( time the aperture is open ) determines the amount of light that enters the camera. The ISO number determines the imaging sensor sensitivity to light. These 3 numbers must be balanced in order to get the proper exposure for your picture. One unit change in each of these elements is either twice or half of the previous sitting. Therefore, if you have the correct combination of these 3 elements for a proper exposure and change one of them by one unit; you can change one of the other 2 by one unit in the opposite direction to maintain the same exposure. Think of water flowing through two pipes at the same velocity. Pipe A’s cross sectional area is twice that of pipe B. In order to get the same amount of water through pipe B as pipe A, pipe B must flow twice as long. The same is true with aperture (size) and exposure (shutter speed) in your camera. But why would you want to change one of these settings if you had the proper exposure? We need to understand how each setting affects the photo. This will be slightly over simplified but it will be instructive. The “f stop” (larger the number, the smaller the aperture) determines the depth of field (amount of photo in focus). About 1/3 of the depth of field is located in front of the focal point and 2/3 is located behind the focal point. Now, the smaller the aperture, the greater the depth of field and visa versa. Ansel Adams used a very small aperture to get an infinite depth of field in many of his outstanding photos, such as “Moon over Hermosa”. In order to accent a face in a crowd, use a large aperture (small “f stop”) for a shallow depth of field. Every other face will be out of focus. The shutter speed is used to freeze motion. However, on some action photos, you do not want to freeze all the action. This could lead to a whole article on action photos. The ISO Number can be increased when you are challenged with the amount of available light. Unfortunately, nothing you get is free. The higher the ISO Number, the less clarity of the photo. Therefore, if you want the sharpest photos, you use the low ISO Numbers. In order to make this more understandable, I have an old Kodak, Retina Reflex IV, film camera. The light meter is not thru the lens. When you center the needle in the light meter by independently adjusting the “f stop” you have the proper exposure. Now assume the setting are ”f stop” = 5.6 and shutter speed is 1/60. If I change the shutter speed to 1/125, the “f stop” automatically slides to 4 (faster shutter speed, larger aperture). If I had changed the shutter speed to 1/30, the “f stop” would slide over to 8. This keeps the exposure the same.
Hopefully, if a young photographer understands this, they would not have to memorize numbers. Keep it simple, stupid.

Blenheim Orange Loc: Michigan

Bobby Howard wrote:

I recently read an interesting article concerning “f stops” and shutter speeds. I am a believer in the KISS Principal”: Keep It Simple, Stupid.
The combination of “f stop” ( size of the aperture ) and shutter speed ( time the aperture is open ) determines the amount of light that enters the camera. The ISO number determines the imaging sensor sensitivity to light. These 3 numbers must be balanced in order to get the proper exposure for your picture. One unit change in each of these elements is either twice or half of the previous sitting. Therefore, if you have the correct combination of these 3 elements for a proper exposure and change one of them by one unit; you can change one of the other 2 by one unit in the opposite direction to maintain the same exposure. Think of water flowing through two pipes at the same velocity. Pipe A’s cross sectional area is twice that of pipe B. In order to get the same amount of water through pipe B as pipe A, pipe B must flow twice as long. The same is true with aperture (size) and exposure (shutter speed) in your camera. But why would you want to change one of these settings if you had the proper exposure? We need to understand how each setting affects the photo. This will be slightly over simplified but it will be instructive. The “f stop” (larger the number, the smaller the aperture) determines the depth of field (amount of photo in focus). About 1/3 of the depth of field is located in front of the focal point and 2/3 is located behind the focal point. Now, the smaller the aperture, the greater the depth of field and visa versa. Ansel Adams used a very small aperture to get an infinite depth of field in many of his outstanding photos, such as “Moon over Hermosa”. In order to accent a face in a crowd, use a large aperture (small “f stop”) for a shallow depth of field. Every other face will be out of focus. The shutter speed is used to freeze motion. However, on some action photos, you do not want to freeze all the action. This could lead to a whole article on action photos. The ISO Number can be increased when you are challenged with the amount of available light. Unfortunately, nothing you get is free. The higher the ISO Number, the less clarity of the photo. Therefore, if you want the sharpest photos, you use the low ISO Numbers. In order to make this more understandable, I have an old Kodak, Retina Reflex IV, film camera. The light meter is not thru the lens. When you center the needle in the light meter by independently adjusting the “f stop” you have the proper exposure. Now assume the setting are ”f stop” = 5.6 and shutter speed is 1/60. If I change the shutter speed to 1/125, the “f stop” automatically slides to 4 (faster shutter speed, larger aperture). If I had changed the shutter speed to 1/30, the “f stop” would slide over to 8. This keeps the exposure the same.
Hopefully, if a young photographer understands this, they would not have to memorize numbers. Keep it simple, stupid.

I recently read an interesting article concerning ... (show quote)

Welcome to UHH.

Mike

BebuLamar

Bobby Howard wrote:

I recently read an interesting article concerning “f stops” and shutter speeds. I am a believer in the KISS Principal”: Keep It Simple, Stupid.
The combination of “f stop” ( size of the aperture ) and shutter speed ( time the aperture is open ) determines the amount of light that enters the camera. The ISO number determines the imaging sensor sensitivity to light. These 3 numbers must be balanced in order to get the proper exposure for your picture. One unit change in each of these elements is either twice or half of the previous sitting. Therefore, if you have the correct combination of these 3 elements for a proper exposure and change one of them by one unit; you can change one of the other 2 by one unit in the opposite direction to maintain the same exposure. Think of water flowing through two pipes at the same velocity. Pipe A’s cross sectional area is twice that of pipe B. In order to get the same amount of water through pipe B as pipe A, pipe B must flow twice as long. The same is true with aperture (size) and exposure (shutter speed) in your camera. But why would you want to change one of these settings if you had the proper exposure? We need to understand how each setting affects the photo. This will be slightly over simplified but it will be instructive. The “f stop” (larger the number, the smaller the aperture) determines the depth of field (amount of photo in focus). About 1/3 of the depth of field is located in front of the focal point and 2/3 is located behind the focal point. Now, the smaller the aperture, the greater the depth of field and visa versa. Ansel Adams used a very small aperture to get an infinite depth of field in many of his outstanding photos, such as “Moon over Hermosa”. In order to accent a face in a crowd, use a large aperture (small “f stop”) for a shallow depth of field. Every other face will be out of focus. The shutter speed is used to freeze motion. However, on some action photos, you do not want to freeze all the action. This could lead to a whole article on action photos. The ISO Number can be increased when you are challenged with the amount of available light. Unfortunately, nothing you get is free. The higher the ISO Number, the less clarity of the photo. Therefore, if you want the sharpest photos, you use the low ISO Numbers. In order to make this more understandable, I have an old Kodak, Retina Reflex IV, film camera. The light meter is not thru the lens. When you center the needle in the light meter by independently adjusting the “f stop” you have the proper exposure. Now assume the setting are ”f stop” = 5.6 and shutter speed is 1/60. If I change the shutter speed to 1/125, the “f stop” automatically slides to 4 (faster shutter speed, larger aperture). If I had changed the shutter speed to 1/30, the “f stop” would slide over to 8. This keeps the exposure the same.
Hopefully, if a young photographer understands this, they would not have to memorize numbers. Keep it simple, stupid.

I recently read an interesting article concerning ... (show quote)

What you said is quite complicated!

Bobby Howard

Sorry. This is about as simple as I can explain the relationships between these 3 settings. Why not use the built in characteristics of the camera to determine the proper exposure and then modify the settings to get the final results that you are looking for. Thanks, Bobby

Bobby Howard

Thanks. I read it faithfully but have never contributed. BH

Bobby Howard

Thanks. I read it faithfully but have never contributed. Thanks for the welcome. Bobby

Blenheim Orange Loc: Michigan

Bobby Howard wrote:

Sorry. This is about as simple as I can explain the relationships between these 3 settings. Why not use the built in characteristics of the camera to determine the proper exposure and then modify the settings to get the final results that you are looking for. Thanks, Bobby

You did well.

Mike

Bobby Howard

Concentrate on the pipes and water. In order to get the same amount of anything through a hole. moving at the same speed, twice the hole size, half the time. Light travels at the same speed and it is very fast. Therefore, twice the hole, half the shutter speed. bobby

topcat Loc: Alameda, CA

rmalarz wrote:

A fun read. Exposure isn't that confusing. It's actually quite simple, until this sort of thing comes along. Nothing like obsfucating a simple topic.
--Bob