[canonfans007]

本人用開7D,但聽聞5DMKII好PQ,所以便岀番部5DMKII,但我發覺同一環境及同一距離下各影一幅相比較(當然FF相會WIDE好多),在CROP大兩相比較之後,發覺5DMKII張相居然完全不比7D清晰,是否與7D像素較密有利CROP相有關呢?唔知有無師兄發覺這問題呢?

[9997074]

可唔可以放兩張相黎比較下...
另外7D有兩粒D4,5d2得一粒....可能咁有影響.

[wesleyyau]

我會估係景深問題... 你如果用50.2 o係7D 同5D2... FF 機景深淺... 你會覺得唔清o既地方多o左... 當然冇相冇setting... 只可以純粹靠估... =p

[h0001244]

For same focal length same distance and crop 5D2 photo, 7D will be more dense than 5D2. That's why infact APS-c has higher requirement on lens on centre spot.

As you are using 5D2 (FF), you will probably walk a bit closer than 7D with same lens. Then you will get same magnification but shallower depth of view. That's the beauty of FF.

If you only test the sharpness, then you are doing lab test but not photography with art sense.

[DCMASTER]

用咩鏡比?

[photowing]

post 相上來一齊討論下

[hotfire009]

h0001244講得幾make sense, 本人已用328試,相要遲点先有,我平時喜歡鳥攝後CROP相,睇0黎用x1.6高像素 CROP機好過FF.

[hktsoi]

這對於盲目相信FF會比APS-C的相機質素優勝的人來說是一大事實上的說明, APS-C並不比FF差的

[petercyc]

講sharp就係7d, 但講細節保留既能力, 一定係5d2. 用途唔同, 兩部有晒就最好.

[hotfire009]

有樣0野講漏,由於crop factor關係,我係要張5DMKII幅相放大160%先等於7D放大100%一樣size,所以5DMKII幅相先比較無details.自今次兩機比較,發覺5DMKII在CROP相方面並不是人家講到0錦天下無敵,只係影得wide点,散影好d而已.

[h0001244]

If you want to know how detail a sensor can sense, you should refer to the pixel size

eg. 5D2 pixel size is 8.4um x 8.4um, 21MP
in aps-c, 30D is also 8.4um x 8.4um, 8.2MP

Without considering the Digic 4, 12 bit or 14bit

For same lens, same distance, same focal length, 30D photo should be as same as 5D2 cropped.

Since 7D has more pixel than 30D, pixels are denser and smaller, then you can get more detail from it if you compare with 5D2

But the above is only physics testing method. We are making arts by photography. You will probably walk a bit closer with 5D 2 than 7D with same lens. Finally you will get similar magnification for same object. 5d2 will be more shallow, more pixel in representing your object.

For 鳥攝, even 400mm is nothing to many people, most of the time you cannot get closer. Cropping photo is a way to help getting a respectively larger object on the frame. Therefore higher pixel density is in advantage.

[hotfire009]

Thanks to h0001244's very pro explanations. Both bodies have their own advantages in different situations.

[cow_size]

Any Photo share??

[hotfire009]

coming later, don't 急!

[petercyc]

做個簡單比較
(相片只係轉自其他網站, 唔係我影既. 只作參考)

FOR SHARPNESS (7D SHARP D)



原相
5D2
http://75.126.132.154/PRODS/E5D2/FULLRES/E5D2hHOUSE.JPG
7D
http://75.126.132.154/PRODS/E7D/FULLRES/E7DhHOUSE.JPG

FOR DETAILS (5D2 DETAILS 多D)



原相
5D2
http://75.126.132.154/PRODS/E5D2/FULLRES/E5D2hSLI00100.JPG
7D
http://75.126.132.154/PRODS/E7D/FULLRES/E7DhSLI00100_NR_2D.JPG