One of the first pictures I ever made with a DSLR, how to get all sharp?

Started Apr 24, 2014 | Discussions thread
WryCuda Senior Member • Posts: 7,275
Re: Ohne of the first pictures I ever made with a DSLR, how to get all sharp?

Cingen wrote:

BobSC wrote:

It's hard to figure out. But here's what you can do:

Set the camera to manual focus. Perhaps 1 foot off the ground. Focus on something about 8 feet out. Now when you look at the photo there will be something that is in focus. That's the best your lens can do. You'll see the grass out of focus, in focus and back out. Like so:

Is this technique used to test a lens his "sweet spot", or to actually spot technical issues that may be wrong? I don't mind the lens not being the best of the best, I'd be crazy expecting a kit lens to be. My main worry is an actual technical problem with either my camera or lens.

For some reason, you seem reluctant to photograph something that will give you an answer to your possible focus problem. Pictures of flowers and grass aren't going to help if you can't get a sharp shot of a flat test target. The test shots of the shed etc. were promising, but black windows are hardly a good contrasty subject. If you can't find a proper res. chart, try a newspaper or magazine.

Try AF through the viewfinder, also try live view and manual focus. the latter should demonstrate what your system is capable of.

Here's a little friend from Australia. As an exercise, find what parts of the subject are slightly out of focus, and suggest how I could have done it differently. Same 18-140mm lens BTW, on an overcast afternoon; Auto-ISO.

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