1 stop

yogestee wrote in post #10271622
^^^^^^

E=IxT

I can't remember how many times I wrote that when studying commercial photography all those years ago..

And this?

defines the effects of macro extension tubes. The longer the lens the longer the tubes you will need for the same change in magnificat

krb wrote in post #10271942
defines the effects of macro extension tubes. The longer the lens the longer the tubes you will need for the same change in magnificat

Bellows factor for a view camera and how much more exposure needed when the bellows is extended longer than the FL of the lens.

krb wrote in post #10271942
defines the effects of macro extension tubes. The longer the lens the longer the tubes you will need for the same change in magnificat

And when calculating view camera exposures..

Woops,,I posted this before reading your post Allen..

yogestee wrote in post #10273363
And when calculating view camera exposures..

Woops,,I posted this before reading your post Allen..

Jurgen, I knew that you had seen this formula MANY times before, thats why I posted it.

Sheesh, going through my photos, I feel so bad 20K and I have only had a few that are really good exposures:o

400dabuser wrote in post #10280352
Sheesh, going through my photos, I feel so bad 20K and I have only had a few that are really good exposures:o

Good exposure in what way? Exposed correctly or good photograph?

Good exposure comes with practise and isnt always the "corect exposure", sometimes going 1 stop over or under "correct" can be used well for effect.

Taking good photographs takes time, experience and a certain amount of analysis (both of yourself and your pictures).

neilwood32 wrote in post #10281081
Good exposure in what way? Exposed correctly or good photograph?

Good exposure comes with practise and isnt always the "corect exposure", sometimes going 1 stop over or under "correct" can be used well for effect.

Taking good photographs takes time, experience and a certain amount of analysis (both of yourself and your pictures).

I was using the theory, and I don't even know where I got it from, that what now appears to me as 1/3 stop, was what I thought was 1-stop or two stops in the case of 2/3rds, that again I have to re-iterate was until 2 weeks ago:o Likewise with the shutter speed, you can understand me looking at my photos again and I start to wonder why so many of them turned out naff, because I didn't understand this 1-stop exposure theory

I had not been to college, never studied this at school, or the opportunity until I picked up my Canon powershot s50 to understand, it was only a workshop that I had been too, had I realise where I was going wrong..I did have the internet, but internet is too distracting for me to concentrate on things

That said, I didn't even realise the difference until last year, when I got the Bryan Peterson book then understood the difference between slr and compacts aperture

..grant that some of them look nice on my flickr accounts, but that not to say I have been very amateurish in my approach towards photography

400dabuser wrote in post #10281937
I was using the theory, and I don't even know where I got it from, that what now appears to me as 1/3 stop, was what I thought was 1-stop or two stops in the case of 2/3rds, that again I have to re-iterate was until 2 weeks ago:o Likewise with the shutter speed, you can understand me looking at my photos again and I start to wonder why so many of them turned out naff, because I didn't understand this 1-stop exposure theory

I'm not sure what you are referring to here. Are you saying that when you moved your aperture or shutter speed by 1/3 stop on the camera you thought that you were really moving it by a full stop? I can see how this is confusing to someone just learning, but are you saying that it was causing you to get bad exposures? In what way?

Well, we all start off in pretty much the same "boat" -- no need to berate yourself! And, if your photos have been looking nice on Flickr, then you are off to a good start! Learning about technical details is good, in fact pretty necessary if you want to get better results from your camera, but what you can't learn from books is the motivation to shoot and the inspiration to create.

tonylong wrote in post #10281985
I'm not sure what you are referring to here. Are you saying that when you moved your aperture or shutter speed by 1/3 stop on the camera you thought that you were really moving it by a full stop? I can see how this is confusing to someone just learning, but are you saying that it was causing you to get bad exposures? In what way?

Yup, I thought the 1/3 stop was 1-stop and so on, I can't explain why I thought that.

Most of them are either overexposed or under, with the rare exception of both

400dabuser wrote in post #10282002
Yup, I thought the 1/3 stop was 1-stop and so on, I can't explain why I thought that.

Most of them are either overexposed or under, with the rare exception of both

Well, that's part of the learning process. Even if you were to shoot in the Auto mode you will still see a variety of results exposure-wise. You are learning though, grasshopper!

400dabuser wrote in post #10282002
Yup, I thought the 1/3 stop was 1-stop and so on, I can't explain why I thought that.

Most of them are either overexposed or under, with the rare exception of both

That is quite normal these days - with most cameras now adjustable in 1/3 stop increments, a lot of people haven't learned what the full f-stops actually were. Which is a shame as they coincide with the doubling/halving of light which actually makes things easier to understand.

If you say to someone "one stop= half the light" its easy, however "1/3 stop= 1/6 the amount of light" it somehow doesn't seem as straight forward!

As for under/over exposed, this is a moot point. An image can be technically exposed correctly however it might not be the best artistically. An over/underexposed image can add to the emotion of a shot.

Think of a model looking at the camera with smouldering eyes - shooting that underexposed 1 stop might actually create more of a mood than being "correct".

tonylong wrote in post #10282066
Well, that's part of the learning process. Even if you were to shoot in the Auto mode you will still see a variety of results exposure-wise. You are learning though, grasshopper!

I tried to go to a college to understand photography, but they didn't want to know, because they felt I knew too much, perhaps it was the way I was trying to explain things that they didn't quite get me

neilwood32 wrote in post #10282100
That is quite normal these days - with most cameras now adjustable in 1/3 stop increments, a lot of people haven't learned what the full f-stops actually were. Which is a shame as they coincide with the doubling/halving of light which actually makes things easier to understand.

If you say to someone "one stop= half the light" its easy, however "1/3 stop= 1/6 the amount of light" it somehow doesn't seem as straight forward!

As for under/over exposed, this is a moot point. An image can be technically exposed correctly however it might not be the best artistically. An over/underexposed image can add to the emotion of a shot.

Think of a model looking at the camera with smouldering eyes - shooting that underexposed 1 stop might actually create more of a mood than being "correct".

I don't get why cameras have 1/3 and 1/2 stops

400dabuser wrote in post #10282207
I tried to go to a college to understand photography, but they didn't want to know, because they felt I knew too much, perhaps it was the way I was trying to explain things that they didn't quite get me

Maybe they were confused by all the commas...

What is there to "get?" Finer control of exposure than full stops but not so fine that you spend all day spinning the wheels to get the desired settings.

400dabuser wrote in post #10282207
I don't get why cameras have 1/3 and 1/2 stops

Would you rather your iPod have volume settings 0-2, with 0 being off, and two being the loudest? So it's either, off, quiet, or loud?

Or 0-25?

I'd prefer my iPod go to 11, but.....