[ognirringo]

放大d 照計會貴d 喎

[bhcs3867]

係就係會放大D，但係會減兩級光圈，即2.8變成5.6，而1.4X只會減一級，即2.8變成4。

[lightcreator]

1.4x is normally more preferable. 1.4x lose ONE stop, but .2.0x lose TWO stops.

[王迦南]

枝野同鏡頭一樣，唔係淨係話越長就越好既，仲要講影像質素和有冇自動對焦。

[ognirringo]

其實我想玩打雀

開頭諗住買400mm f5.6 再加 2x 都有800mm

但唔減兩級光圈冇自動對焦好煩

如果400mm + 1.4x 打雀夠唔夠呢

我用400d 乘埋1.6 都有896mm

同埋得f8會唔會唔夠光呢

[kingkonghk]

直接買支600/4囉

[王迦南]

打雀恩物。

[BomBoy-W]

kingkonghk 兄,
毒得你丫, 600/4 都 up 得出 !! 哈哈哈哈

[kingkonghk]

up得出唔緊要, 拎出街先吃力呀

[lightcreator]

1.4x is much better anyway that you only lose 1 stop and 2.0x you will lose "TWO".

Also 2x is physically slightly longer and may have slightly more loose space between the lens and camera - vibration and movement concern.

Most F1 photographers in the world I know only use 1.4x II most of the time for this reason. EF 600mm + 1.4x is their usual prefer longest focal length combo.