for anyone who hasn't noticed, read the word down the middle of the stack
mmmn very clever but is the "r" one a £2 coin by any chance?
Dont think theres any "r"s on a pond coin edging?
I'm assuming its a crop
Great shot, very clear!
Like the "MACRO: wording as well!
Spence
Cooooooooool photo. How do extension tubes work?
The light loss has nothing to do with the magnification letting less light in, it's because the light has to travel further and the inverse square rule starts to have an effect.
I might not know much about photography but I know about Physics!
With a small tube the sensor is effectively at pos B. Just like you said the inverse-square law applies BUT all that is saying is what I was saying it was just that I was explaining it in laymans terms. Less of the light coming from the lens hits the sensor making the picture darker. (and this percentage is related to the magnification)
You're still hung up on the magnification but it's got nothing to do with the reduction of light.
If you put a 25mm tube on a 50mm lens the magnification is greater than putting the tube on a 100mm lens. But the light loss is the same for both. The light loss has NOTHING to do with the magnification only the distance the light travels - the further it travels the more it will spread (and that's got nothing to do with the magnification).
nice diagram btw cowasaki
girlfriends.
The light spreading out is what CAUSES the magnification the reduction in amount of light is caused by this spread (not caused by the distance) but it is completely linked to the amount of magnification.
If I understand the above you're saying that because the image being resolved is spread further out (magnified) less light reaches the sensor?
Yes?