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Nice idea. A difficult one from implementation standpoint: When I change the distance, it just scales the girl's face as a 2D image -- no perspective. :-) I'
by alok-g 16y ago
Nice idea.
A difficult one from implementation standpoint: When I change the distance, it just scales the girl's face as a 2D image -- no perspective. :-) I'm not being picky, just that this is sometimes a consideration for me when clicking...
Wish someone can point me to the mathematics behind this stuff. I figure ISO means gain of some amplifier inside so less photons would be needed to get to the same voltage at the expense of more noise. I can see how with the two auto modes, aperture size and shutter speeds relate to each other (basically you need to gather a similar number of photons, given the ISO setting). Yet do not know the mathematics behind why aperture size affects the depth of focus. Likewise, why focal length does the same. What's the mathematical definition of Fstop. And last but not the least, what role the sensor size play into all of this.
- sbierwagen 16y agohttps://secure.wikimedia.org/wikipedia/en/w/index.php?title=F-number https://secure.wikimedia.org/wikipedia/en/w/index.php?title=... https://secure.wikimedia.org/wikipedia/en/wiki/Focal_length https://secure.wikimedia.org/wikipedia/en/wiki/Focal_length https://secure.wikimedia.org/wikipedia/en/wiki/Depth_of_field https://secure.wikimedia.org/wikipedia/en/wiki/Depth_of_fiel... https://secure.wikimedia.org/wikipedia/en/wiki/Film_speed#Digital_camera_ISO_speed_and_exposure_index https://secure.wikimedia.org/wikipedia/en/wiki/Film_speed#Di...
- alok-g 16y agoThis helped: https://secure.wikimedia.org/wikipedia/en/wiki/Depth_of_field#Derivation_of_the_DOF_formulas https://secure.wikimedia.org/wikipedia/en/wiki/Depth_of_fiel... Still do not know how sensor size affects things. Will read more, and hopefully will be able to construct a single mathematical model that couples all of these together.