XF185518mmF2.8 by ldg52121, on Flickr1. 場景我家裏的一面對稱的格子狀廚櫃
2. 上腳架, 關防手震 , 拔掉保護鏡, 全部都有上遮光罩
3. 對焦分別用彈性定點, 對準中央畫質那幾個字
4. 晚上拍攝,ISO改採200
5. 採A模式, 在各個光圈拍照, 由相機決定曝光時間,
6. 過片模式採2秒定時自拍
以下是我盡量讓相機面與廚櫃形成兩個平行面方法, 希望整個儲櫃都能成為焦平面
1. 雲台上有三個水平儀, 先讓這三個水平儀的氣泡在中間, 保持與地面的水平
2. 因為XM沒有內建方格+兩對角斜線, 先用A7內建的電子水平儀及相機格線採方格+兩對角斜線, 將整個雲台腳架的三維空間擺到適當位置, 盡量讓相機面與牆面形成兩平行面, 以減少誤差
DSCF1441 by ldg52121, on Flickr腳架固定後不再移動, 先後測四支鏡頭, 測的順序是XF18135, XF1855, XC1650, XF14 ,如果有焦平面沒對好, 應該四隻鏡頭同時受到影響
其中XF18135, XF1855, XC1650廣角都測18端, 望遠端XF18135, XF1855測55mm, XC1650測50mm端
以下在18mm端三鏡各光圈都有的部分做比較, 拍攝過程腳架都沒動過
拉XF14進來, 主要是知道這隻鏡頭沒有光軸偏移, 可以和其他鏡頭做比較 如果圖太長, 你沒有時間看完, 請把焦點放在左邊畫質
到光圈3.5前只有XF1855及XF14, 在這裡讓人很意外的是在光圈3.5之前, XF1855竟然表現的比XF14好
XF1855 18mm端 F2.8 中央畫質
XF185518mmF2.8_C by ldg52121, on FlickrXF14 F2.8中央畫質
XF14F2.8_C by ldg52121, on FlickrXF1855 18mm端 F2.8 右邊畫質
XF185518mmF2.8_R by ldg52121, on FlickrXF14 F2.8 右邊畫質
XF14F2.8_R by ldg52121, on FlickrXF1855 18mm端 F2.8 左邊畫質
XF185518mmF2.8_L by ldg52121, on FlickrXF14 F2.8 左邊畫質
XF14F2.8_L by ldg52121, on FlickrXF1855 18mm端 F3.2 中央畫質
XF185518mmF3.2_C by ldg52121, on FlickrXF14 F3.2 中央畫質
XF14F3.2_C by ldg52121, on FlickrXF1855是支很優秀的鏡頭, 中央與周邊畫質在光圈全開即可使用, 在這裡發現XF14在光圈全開的時候左右兩邊畫質都不理想,直到縮兩級光圈以後周邊畫質才獲得改善
XF1855 18mm端 F3.2 右邊畫質
XF185518mmF3.2_R by ldg52121, on FlickrXF14 F3.2 右邊畫質
XF14F3.2_R by ldg52121, on FlickrXF1855 18mm端 F3.2 左邊畫質
XF185518mmF3.2_L by ldg52121, on FlickrXF14 F3.2 左邊畫質
XF14F3.2_L by ldg52121, on FlickrF3.6以後, 四隻鏡頭一起出現
四隻鏡頭的中央畫質在光圈全開的時候都沒有甚麼問題
XF1855 18mm端 F3.6 中央畫質
XF185518mmF3.6_C by ldg52121, on FlickrXF18135 18mm端 F3.5中央畫質
XF1813518mmF3.5_C by ldg52121, on FlickrXC1650 18mm端 F3.6 中央畫質
XC165018mmF3.6_C by ldg52121, on FlickrXF14 F3.6 中央畫質
XF14F3.6_C by ldg52121, on FlickrXF1855 18mm端 F3.6 右邊畫質
XF185518mmF3.6_R by ldg52121, on FlickrXF18135 18mm端 F3.5右邊畫質
XF1813518mmF3.5_R by ldg52121, on FlickrXC1650 18mm端 F3.6 右邊畫質
XC165018mmF3.6_R by ldg52121, on FlickrXF14 F3.6 右邊畫質
XF14F3.6_R by ldg52121, on Flickr請注意XF18135及XC1650都有光軸偏移的問題, 兩隻鏡頭的左邊畫質尤其糟糕
XF1855 18mm端 F3.6 左邊畫質
XF185518mmF3.6_L by ldg52121, on FlickrXF18135 18mm端 F3.5 左邊畫質
XF1813518mmF3.5_L by ldg52121, on FlickrXC1650 18mm端 F3.6 左邊畫質
XC165018mmF3.6_L by ldg52121, on FlickrXF14 F3.6 左邊畫質
XF14F3.6_L by ldg52121, on FlickrXF1855 18mm端 F4 中央畫質
XF185518mmF4_C by ldg52121, on FlickrXF18135 18mm端 F4 中央畫質
XF1813518mmF4_C by ldg52121, on FlickrXC1650 18mm端 F4中央畫質
XC165018mmF4_C by ldg52121, on FlickrXF14 F4 中央畫質
XF14F4_C by ldg52121, on FlickrXF1855 18mm端 F4 右邊畫質
XF185518mmF4_R by ldg52121, on FlickrXF18135 18mm端 F4 右邊畫質
XF1813518mmF4_R by ldg52121, on FlickrXC1650 18mm端 F4右邊畫質
XC165018mmF4_R by ldg52121, on FlickrXF14 F4 右邊畫質
XF14F4_R by ldg52121, on FlickrXF1855 18mm端 F4 左邊畫質
XF185518mmF4_L by ldg52121, on FlickrXF18135 18mm端 F4 左邊畫質
XF1813518mmF4_L by ldg52121, on FlickrXC1650 18mm端 F4左邊畫質
XC165018mmF4_L by ldg52121, on FlickrXF14 F4 左邊畫質
XF14F4_L by ldg52121, on FlickrXF1855 18mm端 F4.5 中央畫質
XF185518mmF4_C by ldg52121, on FlickrXF18135 18mm端 F4.5 中央畫質
XF1813518mmF4.5_C by ldg52121, on FlickrXC1650 18mm端 F4.5 中央畫質
XC165018mmF4.5_C by ldg52121, on FlickrXF14 F4.5 中央畫質
XF14F4.5_C by ldg52121, on FlickrXF1855 18mm端 F4.5 右邊畫質
XF185518mmF4_R by ldg52121, on FlickrXF18135 18mm端 F4.5 右邊畫質
XF1813518mmF4.5_R by ldg52121, on FlickrXC1650 18mm端 F4.5 右邊畫質
XC165018mmF4.5_R by ldg52121, on FlickrXF14 F4.5 右邊畫質
XF14F4.5_R by ldg52121, on FlickrXF18135左邊不清楚的狀況在光圈縮了兩級F4.5之後獲得了改善, 但XC1650右邊畫質還可以, 左邊畫質從頭到尾都一直很糟糕
XF1855 18mm端 F4.5 左邊畫質
XF185518mmF4.5_R by ldg52121, on FlickrXF18135 18mm端 F4.5 左邊畫質
XF1813518mmF4.5_L by ldg52121, on FlickrXC1650 18mm端 F4.5 左邊畫質
XC165018mmF4.5_L by ldg52121, on FlickrXF14 F4.5 左邊畫質
XF14F4.5_L by ldg52121, on FlickrXF1855 18mm端 F5 中央畫質
XF185518mmF5_C by ldg52121, on FlickrXF18135 18mm端 F5 中央畫質
XF1813518mmF5_C by ldg52121, on FlickrXC1650 18mm端 F5 中央畫質
XC165018mmF5_C by ldg52121, on FlickrXF14 F5 中央畫質
XF14F5_C by ldg52121, on FlickrXF1855 18mm端 F5 右邊畫質
XF185518mmF5_R by ldg52121, on FlickrXF18135 18mm端 F5 右邊畫質
XF1813518mmF5_R by ldg52121, on FlickrXC1650 18mm端 F5 右邊畫質
XC165018mmF5_R by ldg52121, on FlickrXF14 F5 右邊畫質
XF14F5_R by ldg52121, on FlickrXF1855 18mm端 F5 左邊畫質
XF185518mmF5_L by ldg52121, on FlickrXF18135 18mm端 F5 左邊畫質
XF1813518mmF5_L by ldg52121, on FlickrXC1650 18mm端 F5 左邊畫質
XC165018mmF5_L by ldg52121, on FlickrXF14 F5 左邊畫質
XF14F5_L by ldg52121, on FlickrXF1855 18mm端 F5.6 中央畫質
XF185518mmF5.6_C by ldg52121, on FlickrXF18135 18mm端 F5.6 中央畫質
XF1813518mmF5.6_C by ldg52121, on FlickrXC1650 18mm端 F5.6 中央畫質
XC165018mmF5.6_C by ldg52121, on FlickrXF14 F5.6 中央畫質
XF14F5.6_C by ldg52121, on FlickrXF1855 18mm端 F5.6 右邊畫質
XF185518mmF5.6_R by ldg52121, on FlickrXF18135 18mm端 F5.6 右邊畫質
XF1813518mmF5.6_R by ldg52121, on FlickrXC1650 18mm端 F5.6 右邊畫質
XC165018mmF5.6_R by ldg52121, on FlickrXF14 F5.6 右邊畫質
XF14F5.6_R by ldg52121, on FlickrXF1855 18mm端 F5.6 左邊畫質
XF185518mmF5.6_L by ldg52121, on FlickrXF18135 18mm端 F5.6 左邊畫質
XF1813518mmF5.6_L by ldg52121, on FlickrXC1650 18mm端 F5.6 左邊畫質
XC165018mmF5.6_L by ldg52121, on FlickrXF14 F5.6 左邊畫質
XF14F5.6_L by ldg52121, on FlickrXF1855 18mm端 F6.4 中央畫質
XF185518mmF6.4_C by ldg52121, on FlickrXF18135 18mm端 F6.4 中央畫質
XF1813518mmF6.4_C by ldg52121, on FlickrXC1650 18mm端 F6.4 中央畫質
XC165018mmF6.4_C by ldg52121, on FlickrXF14 F6.4 中央畫質
XF14F5_R by ldg52121, on FlickrXF1855 18mm端 F6.4 右邊畫質
XF185518mmF6.4_R by ldg52121, on FlickrXF18135 18mm端 F6.4 右邊畫質
XF1813518mmF6.4_R by ldg52121, on FlickrXC1650 18mm端 F6.4 右邊畫質
XC165018mmF6.4_R by ldg52121, on FlickrXF14 F6.4 右邊畫質
XF14F6.4_R by ldg52121, on FlickrXF1855 18mm端 F6.4 左邊畫質
XF185518mmF6.4_L by ldg52121, on FlickrXF18135 18mm端 F6.4 左邊畫質
XF1813518mmF6.4_L by ldg52121, on FlickrXC1650 18mm端 F6.4 左邊畫質
XC165018mmF6.4_L by ldg52121, on FlickrXF14 F6.4 左邊畫質
XF14F6.4_L by ldg52121, on FlickrXF1855 18mm端 F7.1 中央畫質
XF185518mmF7.1_C by ldg52121, on FlickrXF18135 18mm端 F7.1 中央畫質
XF1813518mmF7.1_C by ldg52121, on FlickrXC1650 18mm端 F7.1 中央畫質
XC165018mmF7.1_C by ldg52121, on FlickrXF14 F7.1 中央畫質
XF14F7.1_C by ldg52121, on FlickrXF1855 18mm端 F7.1 右邊畫質
XF185518mmF7.1_R by ldg52121, on FlickrXF18135 18mm端 F7.1 右邊畫質
XF1813518mmF7.1_R by ldg52121, on FlickrXC1650 18mm端 F7.1 右邊畫質
XC165018mmF7.1_R by ldg52121, on FlickrXF14 F7.1 右邊畫質
XF14F7.1_R by ldg52121, on FlickrXF1855 18mm端 F7.1 左邊畫質
XF185518mmF7.1_L by ldg52121, on FlickrXF18135 18mm端 F7.1 左邊畫質
XF1813518mmF7.1_L by ldg52121, on FlickrXC1650 18mm端 F7.1 左邊畫質
XC165018mmF7.1_L by ldg52121, on FlickrXF14 F7.1 左邊畫質
XF14F7.1_L by ldg52121, on FlickrXF1855 18mm端 F8 中央畫質
XF185518mmF8_C by ldg52121, on FlickrXF18135 18mm端 F8 中央畫質
XF1813518mmF8_C by ldg52121, on FlickrXC1650 18mm端 F8 中央畫質
XC165018mmF8_C by ldg52121, on FlickrXF14 F8 中央畫質
XF14F8_C by ldg52121, on FlickrXF1855 18mm端 F8 右邊畫質
XF185518mmF8_R by ldg52121, on FlickrXF18135 18mm端 F8 右邊畫質
XF1813518mmF8_R by ldg52121, on FlickrXC1650 18mm端 F8 右邊畫質
XC165018mmF8_R by ldg52121, on FlickrXF14 F8 右邊畫質
XF14F8_R by ldg52121, on FlickrXF1855 18mm端 F8 左邊畫質
XF185518mmF8_L by ldg52121, on FlickrXF18135 18mm端 F8 左邊畫質
XF1813518mmF8_L by ldg52121, on FlickrXC1650 18mm端 F8 左邊畫質
XC165018mmF8_L by ldg52121, on FlickrXF14 F8 左邊畫質
XF14F8_L by ldg52121, on FlickrXF1855 18mm端 F9 中央畫質
XF185518mmF9_C by ldg52121, on FlickrXF18135 18mm端 F9 中央畫質
XF1813518mmF9_C by ldg52121, on FlickrXC1650 18mm端 F9 中央畫質
XC165018mmF9_C by ldg52121, on FlickrXF14 F9 中央畫質
XF14F9_C by ldg52121, on FlickrXF1855 18mm端 F9 右邊畫質
XF185518mmF9_R by ldg52121, on FlickrXF18135 18mm端 F9 右邊畫質
XF1813518mmF9_R by ldg52121, on FlickrXC1650 18mm端 F9 右邊畫質
XC165018mmF9_R by ldg52121, on FlickrXF14 F9 右邊畫質
XF14F9_R by ldg52121, on FlickrXF1855 18mm端 F9 左邊畫質
XF185518mmF9_L by ldg52121, on FlickrXF18135 18mm端 F9 左邊畫質
XF1813518mmF9_L by ldg52121, on FlickrXC1650 18mm端 F9 左邊畫質
XC165018mmF9_C by ldg52121, on FlickrXF14 F9 左邊畫質
XF14F9_L by ldg52121, on FlickrXF1855 18mm端 F10 中央畫質
XF185518mmF10_C by ldg52121, on FlickrXF18135 18mm端 F10 中央畫質
XF1813518mmF10_C by ldg52121, on FlickrXC1650 18mm端 F10 中央畫質
XC165018mmF10_C by ldg52121, on FlickrXF14 F10 中央畫質
XF14F10_C by ldg52121, on FlickrXF1855 18mm端 F10 右邊畫質
XF185518mmF10_R by ldg52121, on FlickrXF18135 18mm端 F10 右邊畫質
XF1813518mmF10_R by ldg52121, on FlickrXC1650 18mm端 F10 右邊畫質
XC165018mmF10_R by ldg52121, on FlickrXF14 F10 右邊畫質
XF14F10_R by ldg52121, on FlickrXF1855 18mm端 F10 左邊畫質
XF185518mmF10_L by ldg52121, on FlickrXF18135 18mm端 F10 左邊畫質
XF1813518mmF10_L by ldg52121, on FlickrXC1650 18mm端 F10 左邊畫質
XC165018mmF10_L by ldg52121, on FlickrXF14 F10 左邊畫質
XF14F10_L by ldg52121, on FlickrXF1855 18mm端 F11 中央畫質
XF185518mmF11_C by ldg52121, on FlickrXF18135 18mm端 F11 中央畫質
XF1813518mmF11_C by ldg52121, on FlickrXC1650 18mm端 F11 中央畫質
XC165018mmF11_C by ldg52121, on FlickrXF14 F11 中央畫質
XF14F11_C by ldg52121, on FlickrXF1855 18mm端 F11 右邊畫質
XF185518mmF11_R by ldg52121, on FlickrXF18135 18mm端 F11 右邊畫質
XF1813518mmF11_R by ldg52121, on FlickrXC1650 18mm端 F11 右邊畫質
XC165018mmF11_R by ldg52121, on FlickrXF14 F11 右邊畫質
XF14F11_R by ldg52121, on FlickrXF1855 18mm端 F11 左邊畫質
XF185518mmF11_L by ldg52121, on FlickrXF18135 18mm端 F11 左邊畫質
XF1813518mmF11_L by ldg52121, on FlickrXC1650 18mm端 F11 左邊畫質
XC165018mmF11_L by ldg52121, on FlickrXF14 F11左邊畫質
XF14F11_L by ldg52121, on FlickrXF1855 18mm端 F13 中央畫質
XF185518mmF13_C by ldg52121, on FlickrXF18135 18mm端 F13 中央畫質
XF1813518mmF13_C by ldg52121, on FlickrXC1650 18mm端 F13 中央畫質
XC165018mmF13_C by ldg52121, on FlickrXF14 F13 中央畫質
XF14F13_C by ldg52121, on FlickrXF1855 18mm端 F13 右邊畫質
XF185518mmF13_R by ldg52121, on FlickrXF18135 18mm端 F13 右邊畫質
XF1813518mmF13_R by ldg52121, on FlickrXC1650 18mm端 F13 右邊畫質
XC165018mmF13_R by ldg52121, on FlickrXF14 F13 右邊畫質
XF14F13_R by ldg52121, on FlickrXF1855 18mm端 F13 左邊畫質
XF185518mmF13_L by ldg52121, on FlickrXF18135 18mm端 F13 左邊畫質
XF1813518mmF13_L by ldg52121, on FlickrXC1650 18mm端 F13 左邊畫質
XC165018mmF13_L by ldg52121, on FlickrXF14 F13 左邊畫質
XF14F13_L by ldg52121, on FlickrXF1855 18mm端 F14 中央畫質
XF185518mmF14_C by ldg52121, on FlickrXF18135 18mm端 F14中央畫質
XF1813518mmF14_C by ldg52121, on FlickrXC1650 18mm端 F14中央畫質
XC165018mmF14_C by ldg52121, on FlickrXF14 F14 中央畫質
XF14F14_C by ldg52121, on FlickrXF1855 18mm端 F14 右邊畫質
XF185518mmF14_R by ldg52121, on FlickrXF18135 18mm端 F14右邊畫質
XF1813518mmF14_R by ldg52121, on FlickrXC1650 18mm端 F14右邊畫質
XC165018mmF14_R by ldg52121, on FlickrXF14 F14 右邊畫質
XF14F14_R by ldg52121, on FlickrXF1855 18mm端 F14 左邊畫質
XF185518mmF14_L by ldg52121, on FlickrXF18135 18mm端 F14左邊畫質
XF1813518mmF14_L by ldg52121, on FlickrXC1650 18mm端 F14左邊畫質
XC165018mmF14_L by ldg52121, on FlickrXF14 F14 左邊畫質
XF14F14_L by ldg52121, on FlickrXF1855 18mm端 F16 中央畫質
XF185518mmF16_C by ldg52121, on FlickrXF18135 18mm端 F16 中央畫質
XF1813518mmF16_C by ldg52121, on FlickrXC1650 18mm端 F16 中央畫質
XC165018mmF16_C by ldg52121, on FlickrXF14 F16 中央畫質
XF14F16_C by ldg52121, on FlickrXF1855 18mm端 F16 右邊畫質
XF185518mmF16_R by ldg52121, on FlickrXF18135 18mm端 F16 右邊畫質
XF1813518mmF16_R by ldg52121, on FlickrXC1650 18mm端 F16 右邊畫質
XC165018mmF16_R by ldg52121, on FlickrXF14 F16 右邊畫質
XF14F16_R by ldg52121, on FlickrXF1855 18mm端 F16 左邊畫質
XF185518mmF16_L by ldg52121, on FlickrXF18135 18mm端 F16 左邊畫質
XF1813518mmF16_L by ldg52121, on FlickrXC1650 18mm端 F16 左邊畫質
XC165018mmF16_L by ldg52121, on FlickrXF14 F16 左邊畫質
XF14F16_L by ldg52121, on FlickrXF1855 18mm端 F18 中央畫質
XF185518mmF18_C by ldg52121, on FlickrXF18135 18mm端 F18 中央畫質
XF1813518mmF18_C by ldg52121, on FlickrXC1650 18mm端 F18 中央畫質
XC165018mmF18_C by ldg52121, on FlickrXF14 F18 中央畫質
XF14F18_C by ldg52121, on FlickrXF1855 18mm端 F18 右邊畫質
XF185518mmF18_R by ldg52121, on FlickrXF18135 18mm端 F18 右邊畫質
XF1813518mmF18_R by ldg52121, on FlickrXC1650 18mm端 F18 右邊畫質
XC165018mmF18_R by ldg52121, on FlickrXF14 F18 右邊畫質
XF14F18_R by ldg52121, on FlickrXF1855 18mm端 F18 左邊畫質
XF185518mmF18_L by ldg52121, on FlickrXF18135 18mm端 F18 左邊畫質
XF1813518mmF18_L by ldg52121, on FlickrXC1650 18mm端 F18 左邊畫質
XC165018mmF18_C by ldg52121, on FlickrXF14 F18 左邊畫質
XF14F18_L by ldg52121, on FlickrXF1855 18mm端 F20 中央畫質
XF185518mmF20_C by ldg52121, on FlickrXF18135 18mm端 F20 中央畫質
XF1813518mmF20_C by ldg52121, on FlickrXC1650 18mm端 F20 中央畫質
XC165018mmF20_C by ldg52121, on FlickrXF14 F20 中央畫質
XF14F20_C by ldg52121, on FlickrXF1855 18mm端 F20 右邊畫質
XF185518mmF20_R by ldg52121, on FlickrXF18135 18mm端 F20 右邊畫質
XF1813518mmF20_R by ldg52121, on FlickrXC1650 18mm端 F20 右邊畫質
XC165018mmF20_R by ldg52121, on FlickrXF14 F20 右邊畫質
XF14F20_R by ldg52121, on FlickrXF1855 18mm端 F20 左邊畫質
XF185518mmF20_L by ldg52121, on FlickrXF18135 18mm端 F20 左邊畫質
XF1813518mmF20_L by ldg52121, on FlickrXC1650 18mm端 F20 左邊畫質
XC165018mmF20_L by ldg52121, on FlickrXF14 F20 左邊畫質
XF14F20_L by ldg52121, on FlickrXF1855 18mm端 F22 中央畫質
XF185518mmF22_C by ldg52121, on FlickrXF18135 18mm端 F22 中央畫質
XF1813518mmF22_C by ldg52121, on FlickrXC1650 18mm端 F22 中央畫質
XC165018mmF22_C by ldg52121, on FlickrXF14 F22 中央畫質
XF14F22_C by ldg52121, on FlickrXF1855 18mm端 F22 右邊畫質
XF185518mmF22_R by ldg52121, on FlickrXF18135 18mm端 F22 右邊畫質
XF1813518mmF22_R by ldg52121, on FlickrXC1650 18mm端 F22 右邊畫質
XC165018mmF22_R by ldg52121, on FlickrXF14 F22 右邊畫質
XF14F22_R by ldg52121, on FlickrXF1855 18mm端 F22 左邊畫質
XF185518mmF22_L by ldg52121, on FlickrXF18135 18mm端 F22 左邊畫質
XF1813518mmF22_L by ldg52121, on FlickrXC1650 18mm端 F22 左邊畫質
XC165018mmF22_L by ldg52121, on FlickrXF14 F22 左邊畫質
XF14F22_L by ldg52121, on Flickr1. XF18-135的18端, 最大光圈F3.5並不是可用光圈, 而是要縮兩級到F4.5才是可用光圈, 這時候周邊畫質就會獲得改善
2. XF1855是隻非常優秀的鏡頭, 光圈全開時， 周邊及中央畫質都是可用畫質, XF14在光圈全開時, 周邊畫質(兩邊都一樣)較差, 縮了兩級光圈之後, 周邊畫質才獲得改善, 但隨著光圈繼續縮小, XF14的畫質就逐漸的勝過XF1855
3. 我同時測四支鏡頭, 腳架固定沒有任何移動, 先後測的順序是XF18135, XF1855, XC1650, XF14 , 結果XC1650及XF18135都有很明顯的有右邊清楚, 左邊模糊的現象, 如果是焦平面沒對好, 那應該四隻都有, 可是第2及第四順位測的鏡頭卻沒有, 我懷疑XF18135, XC1650有光軸偏移的問題, 這不知道是個別組裝的問題, 還是鏡頭本身的特性就不得而知了, XF18135縮兩級光圈, 左邊畫質不佳就獲得改善, XC1650卻從頭縮到尾都沒改善, 果然便宜沒好貨, 下次再也不買XC鏡頭了
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