Hi all cs-er,
i've a question which i still yet to have a conclusion or a clear answer to it ...
i notice there is a infinity symbol on the 15-85mm lens ... i've google it and it seems like it is 'infinity focus' ..
but under what kind of situation will it be useful for?
quoted from wiki
'In optics and photography, infinity focus is the state where a lens or other optical device forms an image of an object an infinite distance away. This corresponds to the point of focus for parallel rays. The image is formed at the focal point of the lens.
In practice, not all photographic lenses are capable of achieving infinity focus. A lens used with an adaptor for close-up focusing, for example, may not be able to focus to infinity.'
some forum say
'Scenery at night where the autofocus might work poorly (e.g., expanses of
city lights, where the autofocus zone happens to be empty)...
Photography through scientific instruments where you want to aim the camera
into the eyepiece, with the camera's focus locked...
And if you are going to have manual focus at all, infinity has to be the end
of its range.'
'just means the focus is onto infinity ( most often for landscape style stuff )'
so what is the accurate way for explaning it?
really appreciate your time to explain for me ...