Today I've had good luck. A few day ago I perceived group of waxwings but I haven't camera with me. Later saw them but from long distance in the cloudy weather and only today although was late afternoon the birds perched on apple-trees and then in the small puddle.
Artifacts are the little bits of digital noise that you can spot in magnified digital images in areas of shadow or large areas of even colours (a big blue sky for example). Below there are two photos. First photo have visible in magnification artefacts and second photo is after get rid artefacts. If we reduce them with the reduce noise filter in the Photoshop not only remove the noise, but also reduce details. There are many programs for reduce noise better or worse but all ones have this defect. How there can avoid of it I found on site of Dave'a - American photographer . There is link to this site Photos4u2c . I must admit that isn't too easy used his method but effect was admirable. Now I use his way very often even when artefacts aren't too visible.
You can see result when you peer at left side especially at left bottom corner. It will be more visible when you will copy photos and peer in your browser in magnification.
Above photo of Сергей Евдокимов from Russia. We see all the corners of this photo are greyed a little. It's example of optical vignetting. This defect can be due to the lens limitations or by camera settings. The camera settings refer to the lens aperture and can often be cured by a reduction in aperture of 2–3 stops.
I met this trio roe deers incidentally about the field road driving the car. These photos are taken from the car window. It's enough hard against the sun to have good result. The animals look too dark, although result isn't too bad.
Enough often there is happen that on the photo, which include water, surface don't have horizontal position and me don't perceive it. Using Photoshop or other program for photo processing we can correct it. It's proper remember about it for accuracy. Above photo as example such situation.
