Fresh Dew on a Rose

by adarsha joisa

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4

The focal length of a lens only applies to objects at infinity, and is the distance (𝑓 in the diagram below) between the lens and the sensor when such an object is in focus. The focal point (F) would actually be ON the sensor. (image cropped from Wikipedia page) As an object gets closer to the sensor, the focal point moves away from the lens, meaning the ...


2

You could reverse stack two lenses, which can give you an effective lens length of 2000mm (that's the right number of zeros) or more.I recently did this with the only two lenses I have - a 55-250 mounted on the camera, and a 18-55 reverse mounted onto that: The trade of with using this method is that the focusing plane of the finished setup will be ...


0

I am not familiar with any app of that sort, but it might help you to consider Macro Photography as an optical capability (i.e. phone hardware) rather than a software one. It all depends on the initial capabilities and characteristics of your phone's camera. Often do mobile phones manufacturers just specify the camera's resolution, that is - how large and ...


4

These lenses work basically like a magnifying glass (or reading glasses) in front of the lens. In fact, not just basically — actually exactly. That has the effect of decreasing the distance from the back of the lens to where an in-focus image is formed, which gives the lens more freedom to focus more closely. And focusing more closely is inherently all ...


3

Because most smartphones without an additional external macro lens do not have optical systems capable of taking photos at close enough minimum focal distances to produce macro photographs. Even if you define macro as the equivalent magnification needed for the tiny sensors found in most phones to produce a print comparable to one made when the image of a ...



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