[h0001244]

我常用大光圈，因深明中間點對焦再recompse於大光圈下出事率高，故選定了41 point cross type 選最近的點對焦再recompose，咁就準好多了。
但礙於太多點數用 joy stick 選擇時較慢，試過改到 15 point，但第二及四排好似不是 cross type，失敗率又高番。
兩難！師兄有無高見？

[chrisma282]

15 point okay!

[viovanda]

如果冇近視，半hold 住，構圖再全時手adjust

[h0001244]

都有難處，因為常於夜間室內影，多時燈光不足，日間就室內大背光多，故VF肉眼看不清的多，所以我要靠AF多

[viovanda]

我用85.2 日頭影都有20%走,除非用腳架加平移滑輪,冇計了

[Obi-Wan]

I use 15 points to speed up. Do not use FOCUS-AND-RECOMPOSE on large aperture especially tele lens

http://www.visual-vacations.com/Photography/focus-recompose_sucks.htm

[h0001244]

I use 50.2, therefore I don't rely on FOCUS-AND-RECOMPOSE, especially the centre point .
Obi Ching, for 15 points, the 2nd and 4th columns might not be cross-type, do you suffer from focus problem under adverse situations when using large aperture lens?

[Vertax]

Agreed