Tech Size

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Telephoto lens, Use the formula -1/f=1/0+1/i to find the image diatance i for an object that is 2,000,000 mm?

from a 250 mm telephoto lens.

your missing the medium (film or sensor size)

anyway i found this type of thing counter productive to producing decent work, i see far to many people can tell you the square root of a 50mm F1.4 on a pink d1d but there images are terrible - - - - to much time in the tech size......

i have never bothered with these techy equations they lead to retarded image making

so go here and get your answer:

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