How can I get sharp landscape photos with a point-and-shoot without losing detail to diffraction?
Asked 9/30/2011
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I’m shooting distant landscape scenes with a point-and-shoot camera. My camera stops down to f/8, but I’ve read that on small-sensor cameras f/8 can soften detail because of diffraction. If I use a wider aperture such as f/5 or f/3, the image doesn’t seem as sharp.
Can I use a wider aperture and compensate with a faster shutter speed to get the same sharp result as f/8, or does that only keep the exposure the same? What settings or focusing approach should I try for the sharpest landscape photos?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
14y ago
2 Answers
5
On your sample photo, fog or smoke in the air seems to be the reason why further landscape is not sharp. Nothing in your camera can help against that. Try coming back at another time to see if the air is more clear. Above a city with polluted air, this might never happen.
A wider aperture with faster shutter time will result in equivalent exposure, but depth of field will be smaller, because it is determined only by the large aperture. Opening up all the way is bad for sharpness because most lenses are getting sharper when aperture is smaller than maximum by a stop or two (unless you hit diffraction limit).
To get maximum depth of field, you should focus to something far away to ensure that you are covering hyperfocal distance. You might also still decide to use f/8, because you might prefer even overall sharpness to better sharpness at smaller range. In technical side of photography, compromises have to be made quite often.
Another thing you could try is sharpening in post processing (e.g. using Unsharp mask).
Originally by user4390. Source · Licensed CC BY-SA 4.0
user4390
14y ago
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A wider aperture plus faster shutter speed can give the same exposure, but not the same depth of field. Depth of field depends mainly on aperture, so f/3 or f/5 will not match f/8 for front-to-back focus.
For landscapes on a point-and-shoot, try these basics:
- Focus far away or near the hyperfocal distance so distant subjects stay within depth of field.
- Avoid shooting wide open if possible; many lenses are sharper stopped down a stop or two from maximum.
- But stopping all the way to f/8 on a small sensor can introduce diffraction, so the best compromise is often somewhere in the middle rather than at the smallest or largest aperture.
Also, in your sample image, haze, fog, smoke, or polluted air may be the main reason distant details look soft. No camera setting can fix poor atmospheric clarity. Shooting the same scene in clearer air or different weather can make a bigger difference than changing shutter speed.
So: shutter speed compensates exposure only; it does not replace a smaller aperture’s depth of field.
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