Discussion in 'Photography Beginners' Forum' started by six-five-two, Sep 25, 2007.
problem solved: f/22
It depends on the lens.. but for the typical lens, increased sharpness usually starts 1-2 stops in from the max aperture. Some lenses are sharp even wide open.
For landscapes with max depth of field, I'll shoot usually at f/11 or f/16.
The term "F8 and be there" was coined for a reason. Most glass has a "Sweet Zone" around f/8-11. But as mentioned above, some are designed to be sharpest wide open. The old MF Nikkor 400 f/3.5 comes to mind. Every lens is differant, ever the same model lens from the same production run will have piece to piece variations. Use it, test it, and decide what works best for you and your style and equipment.
If you read the lab reports on particular lenses as I do, then you realize that it is often f2.8 or f4.
Skieur what kind of lenses are you using that are sharpest at f/2.8???? Mostly the sharpness curves follow the standard bell curve for a reason.
Normally they are sharpest 2-3 stops from wide open. On an f/1.8 lens it may be f/4-5.6 is sharpest. On my 18-70 it's around f/8. One thing important to note is that at f/11 diffraction on a digital camera causes a loss of sharpness. On a film camera or a full frame sensor camera like the Canon 5D this is around f/16.
Minolta and Tokina.
Many Leica lenses are sharpest at maximum aperture.
"F8 and be there" means you can turn your camera into a nice Point-and-Shoot whereby your DOF makes almost everything more than five-to-six feet away in focus.
Specifics.? I'm curious too.... not too many lenses that have their sharpest aperture at max aperture.
Leica have some sharp lenses at max but even those show improvement as you stop down. 35mm f/1.4 Summilux asph for example.. >>read<< expensive.
The two lenses I have is the Pentax 75-300mm f/4.5 f/5.8 (my zoom lens) and my primary lens: Pentax 18-55mm K100D Kit Lens.
Where can you get the reports / data / graphs and how do you interpret the data? Can you share more information.
Everyone says each model lens has a different sweet spot. Where's the site that reports lenses and their sharpest apertures.
f22-f32 for my stuff.
Noob post engage..
So basically Fstop is Aperture? And Aperture is the amount of light let into a lens when taking a picture?
So basically higher Aperture settings make for a sharper, more clear image?
When a lens says f/4-5.6 does that mean the HIGHEST Aperture setting that lens can be set to is 5.6?
Sorry for the noobish questions, we all have to start somewhere.
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