我大約都明佢X, Y axis同埋spatial frequencies 點解
亦都大約明白點解要用10lines/mm and 30lines/mm
1. 想請問呢兩樣點解, 係睇D咩(Sagittal, Meridional) 好似同astigmatic affection有關, 對嗎??
2. contrast, sharpness, resolution 呢三樣有咩分別?
3. Vignetting, Chromatic Aberrations 又點解?? y axis係ev單位代表咩?
呢皇的MTF圖又點睇?因我只係明由0-1做range, 如果變晒absolute value又點解讀??
http://photozone.de/nikon--nikko ... 8105_3556vr?start=1
4. MTF 50%又咩意思
望有心解答, 謝