佢地係原 size crop image 出黎, 你是一樣嗎?天狼星 寫:溫度影響真係咁大?
我係一月時試過用350d,iso1600暴左5分鐘都冇你地咁誇張...
350D, 400D & 30D Hotpixel Test
你呢張相咪正正証實溫度影響有幾咁大!天狼星 寫:溫度影響真係咁大?
我係一月時試過用350d,iso1600暴左5分鐘都冇你地咁誇張...
一月時試 <-- 我相信溫度比我地試的低差不多 10 度, 而明顯 noise 少好多.
假如你影果陣係 15 度. 可以同呢個 topic 0既 darkframe 比較下:
http://www.hkastroforum.net/viewtopic.php?p=32320#32320
1. 100% crop or not (100% crop show most noise)
2. temperature (the lower the temperature, lesser noise)
3. JPG or RAW (the hot pixels, random noise are all burr in JPG format due to compression and looks much cleaner)
All three will affect seriously the among of noise. I suggest Mr. Sirius to try one more time at ~ 30 degree C, RAW, and 100% crop again. Surely it will surprise u lar.
2. temperature (the lower the temperature, lesser noise)
3. JPG or RAW (the hot pixels, random noise are all burr in JPG format due to compression and looks much cleaner)
All three will affect seriously the among of noise. I suggest Mr. Sirius to try one more time at ~ 30 degree C, RAW, and 100% crop again. Surely it will surprise u lar.
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