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6
votes
1answer
797 views
How can I calculate the change an extension tube makes to the maximum magnification of a lens? [duplicate]
Possible Duplicate:
How can I calculate what the effect of an extension tube will be?
My understanding is that extension tubes increase the magnification of lenses by reducing their minimum ...
7
votes
3answers
308 views
How much distance should one move so that a shot that can be framed at xx mm be framed at yy mm?
Is there a website / app that will tell you approximately how much distance a person should move so that they are able to frame the same shot at different focal lengths?
Say for example, I'm ...
2
votes
3answers
2k views
Calculate object size when I have physical pixel size
How do I calculate the object size when I have
focal length = 25mm
distance to object = 700mm
CCDs pixel size = 4,4µm ?
My camera is this one.
Appreciated!
Edit: Could this work:
real height ...
2
votes
2answers
491 views
Can we measure size of an object using EXIF data from a photo?
A lot of people have asked if we can measure the distance of an object in photo. But I was wondering if we can measure the size of an object in photo. Of course assuming we know everything from sensor ...
