[hkstc]

http://www.amigobbs.net/dispbbs.asp?boardID=38&ID=433&page=1

[philip5cf]

有一點要先認知！執過唔同整過！執係還原為前題！整係無中生有，我所講暨平面設計！執相對某些 DC 機呢講係完成之中暨一部份！有個亞 sir 同我講過，用 DC 影暨相係應該一定 sharp 暨！唔 sharp 係唔 Arm！普通小形至 prosumer級機都(應該)一定 sharp。D-slr 就唔一定，因為要做好雜訊控制加左 filter。所以要執番 sharp佢！至放爆光問題更簡單因如果你過爆就冇得搞！under 還有得加番小小。所以我唔讚成加野，轉色之類動作但正常暨加光，sharpen 之類就會做。至於你話暨幾張相我唔覺有咩唔正常！有錯請指教！謝謝。

[kkyy]

philip5cf

Agree.

[wchak47]

>http://www.amigobbs.net/dispbbs.asp?boardID=38&ID=433&page=1 <

[tam_dominic]

philip5cf

I guess your 'sir' says is "in focus" not sharp.
Since the sensor of point and shoot DC is small thus the depth of field is very large.

With 38mm wide focus on 10 feet the object are likely in focus from 3 feet to infinitive even it is F5.6.

All sensors except Foveon(Sigma using it) use 3 photo cells to represent one dot of image that is why they are not sharp when display 1:1 ratio on screen.

Most consumer DC images are sharpened to make it look sharp right out of the camera. The white line around the edge of high contrast object is the result of sharpening which give illusion that the image is sharp.

Happy discussion !

[philip5cf]

oh, base on the instrutor of Canon digital school informed, that is intented by the design of the Canon DC engineer that the 3 Low Pass Filter will soft out the edge of image to compansated the appearing of the noise. so even you feel satifly about the sharpless, it still room for inproved. and I did experience this happen. and I do agree and understand you advise and with thanks. :-) (hope you forgive my bad spelling)