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發表於 2016-2-12 19:38:21
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本帖最後由 Keroro88 於 2016-2-12 22:22 編輯
Leica Summar 5cm F2 的鏡頭規格:
Leica Order No. - SUMAR (1933) SUMUS (1934) KUP or CHROM LLC - 117
Production era - 1933-1940 < 127,950 lenses
Variants - Rigid (ca.2000 lenses), tropical (with extra front element), collapsible, nickel, chrome, black front ring, metric and foot versions
Lens mount - Leica Screw-thread (L39)
Number of lenses /groups - 6 /4
F stop range - f/2-f/12.5
Closest focusing distance - 1 m
Diaphragm setting /type - 6-blade / 10-blade
Angle of view diagonal - 45 degrees
Filter type - A36
Accessories - Hood: SOOMP Viewfinders: VIDOM, VIOOH, SBOOI 12015
Materials - Nickel or chrome plated brass
Dimensions (length x diameter) - 50mm x 46mm
Weight - 205 g /7.23 oz
Summar出廠的時候, 都是沒有鍍膜的鏡頭,Summar 成像有點類似柔光鏡,反差非常低,適合黑白攝影,還有弱光下面呈現細膩的灰度,晴天彩色色散很強,但仍然有其特色。
當把光圈收細後,可以看到呈六角形的雙層光圈葉!
光圈全開,背後散景光點呈現橢圓形
收一級光圈後,背後散景光點呈現六角形
F2 光圈全開
F4
F12.5 最細光圈 |
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