New answers tagged zoom
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No, the Olloclip Macro 21x lens allows you to get very close to your subject to make small things look bigger. It will not let you shoot objects far away.
It will magnify things sort of like a microscope, not a telescope.
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I agree with user86418's assessment that Jerry Coffin's answer has this backward, though he in turn seems to have conflated numerical aperture with ƒ/number.
Quoting outdoorphotographer.com
In a variable-aperture zoom ... elements in front of and behind the
diaphragm move (and the diaphragm itself moves), so the entrance pupil
doesn’t vary in ...
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