oliver119911 wrote:
Sony 135mm 1.8GM vs Sigma 135mm 1.8 ART | This may SURPRISE YOU!
https://www.dpreview.com/articles/1478096987/roger-cicala-tests-new-sony-fe-135mm-f1p8-gm-confirms-insanely-good-mtf-results
"The MTF drops away from the center, of course, but even at the very edges, the readings are still quite high.
Let’s compare it to the Sigma 135mm f1.8, which until today was the sharpest 135mm we had tested. In the outer 1/2 of the image they’re pretty even, but in the center half, the Sony GM is dramatically better, especially at higher resolutions."


Summary
"But as far as the test goes, the results are pretty simple. This is the sharpest lens we’ve tested. Period. (At last count, that’s out of 300+ lenses tested.)"



完全不明白接寫環的應用才有這種想法.看到別人用在400GM + X2 + X1.4 就想學著用在135GM ? 400GM 加了兩個加倍鏡等效焦段1120mm ,"最遠" 對焦距離只剩下40公尺 ;而且可對焦成像區僅限接近40M 的位置,距離太近還對不了焦; 用在135mm 上加上x2 鏡不過270mm , 你想要多遠的對焦距離? 300mm 加接寫環拍花花草草對焦距離不超過5米, 記得135GM 驗證後再提供對焦距離出來啊...
另外這與MB5 轉接兩個加倍鏡是完全不一樣的事...實在不想讓人看到你的發言一頭跳進來買個Kenko 的16mm接寫環及Sony 加倍鏡...
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