What should be the f - number and focus range for 'Macro' of a point and shoot camera ?
I saw that point and shoot camera usually have f-6.3 at max. But Canon says it can go upto f-20 at telephoto. Is it possible ?
- Rob BLv 47 years agoFavourite answer
The f-stop controls the Depth of Field (DoF) in an image. This is the range that the photo is in focus. It is a percentage of the focal range. So, if you are using small f-stop (large aperture) at, say, 100 feet, that depth could be several feet. If you're using it at a macro range, of inches, it's going to be a very narrow band of focus. It can be narrow enough to get the face of a butterfly in focus, and the rest not in focus. If the subject is moving slightly, it can also cause it to go in and out of focus quickly. That is why you want the largest f-stop you have light for.
Now, the questions is when you are talking about the maximum f-stop, are you talking about the actual aperture, or, are you using the range most lenses indicate, such as f/3.5-6.4? That range is not the maximum f-stop. That is the range of minimum f-stops based on the telephoto lens. With the lens set for wide angle, you would have a minimum f-stop of 3.5. At full telephoto range, you'd only have 6.4. Most lenses will go up to an f-stop of f/18 or higher.
Also keep in mind, Canon is probably discussing actual macro lenses, while a point and shoot is shooting a macro-like image. It's more of a close focus range, rather than true macro.
- B KLv 77 years ago
If the camera has manual mode or aperture priority mode - you can set any f/stop you like as long it is narrower than f/6.3 - the upper limit only kicks in if you use the telephoto zoom at maximum, your widest aperture would then be f/20.
For macro shots you don't want wide open apertures, you want the narrowest aperture you can work with. Otherwise you will get such a shallow depth of field, you will have difficulty focussing on anything.
Tutorial: How to set the aperture for macro shots: http://www.digitalcameraworld.com/2013/06/17/how-t...