Digital Photography > Learn Photography

Getting Sharp Images

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aniltulsi:
Thanks Somnath, for the tip. I had read about use of zoom with Live-View for focusing, but never used it. I tried it last evening, and found it quite effective.

Vimal, yes, missed the important point on speed. Updated the text above.

Yes Henry, many great photographers do not bother about sharpness, but focus on the concept, like for many painters, the visual impact and story, is more important than the painting figures accurately. But I am not anywhere near those greats, and 'am happy if the image is sharp enough, and that itself is a achievement for me.

Right arun, light is the basic requirement of photography...

dutta.debasish:
Mostly lenses are the sharpest when stop down 2 steps from the max aperture.
If subject is moving, the maximum possible shutter speed is good.
If still subject, use the focus mode One Shot for Canon or Single Servo for Nikon
AI Servo or continuas Servo is best when the subject is moving
some time AI Focus (on Canon, I don't know what it says in nikon) that are good for when you have a subject that is still, but has the possibility of movement like a small child or eyeball. The AF will lock on the subject but if the subject moves it will go into AI Servo mode to keep track of the subject.
Unless you are in an extremely fast situation (like flying bird) that just requires incredibly fast focusing, it’s best to avoid using the All Point Focus.
if you are zooming a distant moving object (like a flying bird) keep the aperture smaller, which increase the hyper focal distance.

....above information is scattered as I just typed as came in mind, may be the sequence is not proper.

Hankosaurus:

--- Quote ---...if you are zooming a distant moving object (like a flying bird) keep the aperture smaller, which increase the hyper-focal distance.
--- End quote ---

It seems that "depth of field" would be a better fit in that phrase, IMO.

If I am not mistaken, the point defined as the hyperfocal point and also the closer edge of the hyperfocal distance move closer to the camera with smaller apertures. Likewise, the distances from those same points increase with respect to infinity. The principle advantage of the smaller aperture is the increased depth of field, and which may or may not reach to infinity as defined within the hyperfocal context.

This is not a bad discussion about hyperfocal distance. I was surprised to see that there are at least two popular definitions of it:
http://en.wikipedia.org/wiki/Hyperfocal_distance

iamsomnath:
one article which has helped even a dummy like me to understand hyperfocul ...

http://www.cambridgeincolour.com/tutorials/hyperfocal-distance.htm

regards

somnath

matbhuvi:
Slight OT on sharpness during post process.

Is it required to change the pixel density before printing or saving for web? Like 96 / 72 PPI for web?

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