Who thinks they know Photography? TEST

[Canon88]

*Please, when responding to this post, address each question with a number preceding the answer*

These questions pertain to digital photography specifically - f-stop and shutter speed limits are taken into account.

Question One: The exposure of your camera is determined by three factors: The ISO, the F-Stop, and the speed of the shutter. True or False? Why?

Question Two:
Scenario: It's the middle of a clear, sunny day. The wind is blowing, and you want to capture the movement of a tree's branches. Even at f/22, ISO 100, their is still enough light to fire the shutter at 1/80th of a second - too fast to capture the sway of the branches. Firing the shutter any slower will cause the picture to be over-exposed. What do you do?

Question Three:
Scenario: You're in a city, say, Time Square. It's night time, and you want to catch the rush of the taxi cabs in motion. Here, the cabs are stop and go, because of traffic lights. At the same time, you can't leave the shutter open for too long because lights from the signs will over-exposure the image. Firstly, what do you expose for, the sky, or the city lights? Secondly, what settings might you potentially use in this scenario?

Question Four:
Scenario: You want to photograph the stars on a clear night. However, the stars are dim, so you will need a long exposure, lasting minutes, or possibly hours. Firstly, how do you determine if the stars are in focus? Secondly, because the exposure is so long, your digital camera can not display the proper length of time the shutter should be left open (you are using a cable release). What device do you use to determine exposure time? And, finally, what f-stop number would you use?

[Concisus Cognatus]

Originally Posted by Canon88

*Please, when responding to this post, address each question with a number preceding the answer*

These questions pertain to digital photography specifically - f-stop and shutter speed limits are taken into account.

Question One: The exposure of your camera is determined by three factors: The ISO, the F-Stop, and the speed of the shutter. True or False? Why?

Question Two:
Scenario: It's the middle of a clear, sunny day. The wind is blowing, and you want to capture the movement of a tree's branches. Even at f/22, ISO 100, their is still enough light to fire the shutter at 1/80th of a second - too fast to capture the sway of the branches. Firing the shutter any slower will cause the picture to be over-exposed. What do you do?

Question Three:
Scenario: You're in a city, say, Time Square. It's night time, and you want to catch the rush of the taxi cabs in motion. Here, the cabs are stop and go, because of traffic lights. At the same time, you can't leave the shutter open for too long because lights from the signs will over-exposure the image. Firstly, what do you expose for, the sky, or the city lights? Secondly, what settings might you potentially use in this scenario?

Question Four:
Scenario: You want to photograph the stars on a clear night. However, the stars are dim, so you will need a long exposure, lasting minutes, or possibly hours. Firstly, how do you determine if the stars are in focus? Secondly, because the exposure is so long, your digital camera can not display the proper length of time the shutter should be left open (you are using a cable release). What device do you use to determine exposure time? And, finally, what f-stop number would you use?

I'm an amateur but I'll bite.

1) I guess True albeit I'm not fluent enough in photgraphic technology to say with certainty why, but, I believe ISO(exposure speed), F-Stop(aperture opening), and shutter speed all mesh together to achieve a desired exposure

2) Raise the ISO, stop down the exposure by 1, maybe 2 stops

3) Too advanced for this amateur

4) Largest F-Stop your lens can achieve...view the stars through the view finder...set menu option for long exposure and set the time for the maximum allowed by the camera options

Hey quit laughing ...

[Michelle Allmon]

Question One: The exposure of your camera is determined by three factors: The ISO, the F-Stop, and the speed of the shutter. True or False? Why?
true, because that is the Creator's will

Question Two:
Scenario: It's the middle of a clear, sunny day. The wind is blowing, and you want to capture the movement of a tree's branches. Even at f/22, ISO 100, their is still enough light to fire the shutter at 1/80th of a second - too fast to capture the sway of the branches. Firing the shutter any slower will cause the picture to be over-exposed. What do you do?
pinhole that sucker

Question Three:
Scenario: You're in a city, say, Time Square. It's night time, and you want to catch the rush of the taxi cabs in motion. Here, the cabs are stop and go, because of traffic lights. At the same time, you can't leave the shutter open for too long because lights from the signs will over-exposure the image. Firstly, what do you expose for, the sky, or the city lights? Secondly, what settings might you potentially use in this scenario?
the lights. exposure compensation +/-2, 3 shots and then get around to combining them in about 5 years right before i delete them because they are NOT ART!


Question Four:
Scenario: You want to photograph the stars on a clear night. However, the stars are dim, so you will need a long exposure, lasting minutes, or possibly hours. Firstly, how do you determine if the stars are in focus? Secondly, because the exposure is so long, your digital camera can not display the proper length of time the shutter should be left open (you are using a cable release). What device do you use to determine exposure time? And, finally, what f-stop number would you use?[/QUOTE]
focus is overrated.
for the length of time, i would use my internal brain meter. it goes something like this: the shutter speed is determined by how much light there is getting in, which is ironically perfectly equal to how long i can be naked outside and get away with it. if it is really dark, i can get away with it for a few hours, so that is how long i will take my picture. if it is a full moon, maybe i can only go undetected for a few minutes so that is how long i will take my picture. in review, take your clothes off and when you feel like you are about to get caught, stop the exposure. it's foolproof.

[Michelle Allmon]

their is still enough light to fire the shutter at 1/80th of a second

ps - it's there, not their
i don't care, i just want the extra credit

[rockpics]

1. ISO is a measure of light sensitivity of the digital sensor or of the film. The lower the ISO, the lower the sensitivity. Fstop and shutter speed control the amount of light reaching the sensor or the film. If you want to use a faster shutter, for instance, raising the ISO will allow you to do so, because at a higher ISO less light is needed to register an
image.
2.Use of a neutral density filter will allow you to decrease the shutter speed, because the
filter will decrease light reaching the sensor or film.
3. If its night, you won't expose for the sky -- there's no point and you'll blow the image.
Expose for the other lights. Use a lens hood to block unwanted city lights. Bracket exposure. With digital you can preview what you're getting, so it's not too hard.
4. Stars are a point light source at infinity. A higher Fstop will not bring them into focus.
They are already in focus. Shoot wide open. When I did this with film I used ISO400 film
at f5.6 for 45 minutes. That was a guess and it worked pretty well.

[jonnydonut]

1. Yes, assuming the light is consistent, but the expose is really determined by the amount of light read by the light meter. ISO, SS and F-stop are the only on camera adjustments.

2. put a pinhole the lens cap and take the picture with the cap on, or try a ND filter?

3 . expose for the lights. I'd say, maybe ISO 100, f/8, 15 seconds. That's just a rough guess.

4. alright, don't know this one, but I will say the f-stop doesn't matter really, I'd open it up almost all the way for brightness, the depth of field is a matter of light years away, so it's not like stars will appear shallow. Focus, no big deal either, the stars are dots, just put it on infinity and be happy with it if you want them thin and sharp. If you want the stars to appear "thick" make the pictuer out of focus. shutter speed really only matters how long you want the streaks of stars to be.

any more?

[Michelle Allmon]

Originally Posted by rockpics

2.Use of a neutral density filter will allow you to decrease the shutter speed, because the
filter will decrease light reaching the sensor or film.

oh yeahhhhh

well, cardboard and duct tape is cheaper

[srwatters]

Let's keep this civil folks. No need for name calling or other personal attacks.