http://www.lensrentals.com/blog/2014/06/comparing-rangefinder-and-slr-50mm-lenses-version-0-7#more-18865
Lensrentals.com的Roger Cicala所發表的新文章
他用新設置好的Optical bench來做不同一般的鏡頭測試
個人積分：22分
文章編號：50444591
個人積分：3528分
文章編號：50445358
Actual Focal Lengths
The Imagemaster contains a grid that lets us measure the exact focal length without a lot of calculations. It isn’t particularly important to note that the Sigma 50mm f/1.4 Art lens has an actual focal length of 49.5mm, while the Zeiss 50mm f/1.4 is 51.5mm and the Canon 50mm f/1.2 is 51.8mm. But I found it amusing when I saw the Zeiss 55mm Otus is actually 54mm, because I’d just read a comment that someone found the Canon 50mm focal length much more usable than the 55mm of the Otus. Really, 52mm is much more usable than 54mm?
It does become slightly interesting with zooms. For example, the 24-70 f/2.8 zooms are between 66 and 67.5mm at the long end, while all 70-200 f/2.8s we’ve tested start at 74 to 76mm.
//////
上次稍有爭議的視角問題。
看他們應該也測試過很多50mm的鏡頭，怎麼canon大廠還沒列上?
Otus 55mm F1.4在這裡好像感覺就變普通了
個人積分：871分
文章編號：50445537
個人積分：871分
文章編號：50445574
個人積分：3528分
文章編號：50445700
個人積分：871分
文章編號：50445823
個人積分：871分
文章編號：50445929
http://www.imx.nl/photo/leica/apo-summicron-m-250-mm-asph.html
數據是怎麼來的他沒細講，但結果顯然跟Roger的不同
我的相簿 http://www.flickr.com/photos/calatravayang
個人積分：871分
文章編號：50507735
Horology wrote:
研究Leica的專家...(恕刪)
也許這就是原因？
http://www.lensrentals.com/blog/2014/06/the-glass-in-the-path-sensor-stacks-and-adapted-lenses
我的相簿 http://www.flickr.com/photos/calatravayang
個人積分：3528分
文章編號：50508520
沒想到M43是用這類型的low pass filter。
