關於leica dg 25mm f1.4 是否需要買減光鏡呢?

小弟感恩節訂購了25mm 目前應該正在寄件的途中~
印象中有看過有人說25mm f1.4這顆在白天光圈全開~好像會過曝??不知道是否正確
那在早上又希望能開到f1.4 來拍照~得到大光圈的效果的情況下~是不是就需要買到減光鏡呢??
那是的話該如何挑選這個減光鏡呢??
小弟有看到這樣幾總選擇~那請問他的 1stop, reduces iso 1/2 是甚麼意思呢??
是否應該買大一點的尺寸的減光鏡再加上口徑轉接環轉接到不同的鏡頭這樣比較划算一點呢??
感謝幫忙解答的各位網友~


ND.3 (exposure adjustment = 1 stop, reduces ISO 1/2)

ND.6 (exposure adjustment = 2 stops, reduces ISO 1/4)

ND.9 (exposure adjustment = 3 stops, reduces ISO 1/8)

ND 1.8 (exposure adjustment = approx. 6 stops, transmits 1% of light,)

ND 3.0 (exposure adjustment = 10 stops, transmits 0.1% of light)

ND 4.0 (exposure adjustment = 13-2/3 stops, transmits 0.01% of light)

ND 6.0 = (exposure adjustment = approx. 20 stops)