On Sat, 9 Jun 2018 06:48:43 +0100, David Taylor
wrote:

On 08/06/2018 12:09, Sammy wrote:
What exactly is different about a lens in Macro mode? Does the lens alter
its optics in some way to focus more closely?

My Galaxy S7 lens doesn't seem to have enough space inside to shift any
elements in a different way. Although my point and shoot has a lens which
comes forward and is made of 6 elements in 5 groups. How do these cameras
provide Macro mode?

If a camera can provide close up macro focusing then why isn't it provided
as part of Normal mode?

In some cases, it's because it would slow down focussing if the software
had to search from a very close macro out to infinity each time to
determine the best focus point. In other cases - e.g. a macro lens for
a interchangeable lens camera - the lens may be designed to work best
when focussing close (have fewer imperfections), and of course it has
that closer focussing range.

My oild Nikon 105mm Macro lens has a switch to limit the focus range
to the closer distances. When this is 'off' the camera can spend an
extrordinary amount of time focussing in and out without ever finding
macro focus. The lens is of the old screw driver drive which is
relatively slow.
--

Regards,

Eric Stevens