Show me how to sharpen a photo, please

Dear Sirs/Madame
1. Please teach me how to sharpen photos taken from Canon 10-22 3.5-4.5 which is only sharp in the center but not sharp on the edge and corners (which is the lens nature)
2. Can we use some kind of software to make the whole picture as sharp as the photos taken from Tokina 11-16 f2.8.
3. Thank you so much
Langin

Some of it will be technique, i.e., using the right aperture and shutter speed to get the best from the lens. Some of it is just the nature of the lens. UWA lenses tend to have fall off towards the edges, it's hard to cram that wide of a view through a lens, correct for distortion and CA, and still keep the image sharp. One thing you could try is the Digital Lens Optimizer in the latest version of Digital Photo Proffesional. Beyond that you'll just have to live with the nature of the lens.

If you have Ps you can try some of the more advanced sharpening techniques in this thread:
https://photography-on-the.net …ht=sharpening+t​ips+tricks

I'm not sure why you think the 10-22mm isn't a pretty darned sharp lens across the frame... or that the Tokina 11-16mm is much better. Compare for yourself.

Do you have a "protection" filter on your 10-22mm? If so, that might explain the softness toward the corners you are seeing. If using one, try the lens without any filter and see if there's a difference.

You might already be aware, most lenses also give the best results at their middle apertures. Try using f8 or f11 at the wide end of the zoom, if not already doing so, whenever light allows.

Sharpness isn't the only consideration... The 10-22mm's biggest "problem" is some vignetting at the largest apertures, which can be controlled in camera with Peripheral Illumination or in software in post production, or simply by stopping the lens down to the middle apertures. The Tokina shows less vignetting at the same focal lengths and larger apertures.

On the other hand, the 10-22mm minimizes flare far better than the Tokina 11-16mm.

The 10-22mm's hood is so large and shallow it doesn't seem like it would have much effect, but it does. It's often important to use it to help prevent flare and help keep colors nicely saturated.

There are many ways to sharpen images... I use Lightroom and Photoshop... first applying a bit of sharpening when converting RAW images in Lightroom. (Note: It depends upon the camera, too. I shoot with 7D mostly, which need more sharpening than some other cameras... I also use 5DII, and don't apply any more than default sharpening initially, when converting RAWs). I then finalizing sharpening as a very last step in Photoshop, once the image has been completely optimized and sized for it's intended use.

i really like the sharpening i get from Lightroom, u can get copy pretty cheap.

A lens question?

The sharpening filters included in LightRoom and also CS5 are quite good. But it's hard to beat the NIK's plugin Sharpener Pro 3.

Rafromak wrote in post #15852396
The sharpening filters included in LightRoom and also CS5 are quite good. But it's hard to beat the NIK's plugin Sharpener Pro 3.

I haven't tried that plugin yet, is it better the DPP?