[playforfun]

不知何故, 對焦總是掙d...

情況1:
室內, bb高速迎面爬來

情況2:
室內, 影bb玩類似打秋千的動作

用d90 + 50.8(舊版) 自動(中間一點)對焦(afs 及afc)都試過, iso已推至1600, 光圈已到f2, 好多時af都追唔到bb, 連拍時, 相片總是好難對到焦(講緊係bb塊面), 又不想用mf, 眾位師兄在拍攝上的建議?

如果換機(如d7000或d300s) 或 鏡(如17-55 f2.8,或35.8), 或其他(如o記ep3) 可有機會改善情況?

[oklee]

I had similar experience as you before, I tried,
1. Use lens with build-in motor, e.g AFS or HSM...
2. Use smaller f value e.g., 5.6, 8
3. Increase the distance between you and your BB.
4. Increase the internal lighting, and increase the ISO (for D90, I feel that 1600 is still ok)
5. Use external flash and shorter the shutter speed.

>>>
The best way is to make your BB don't more., your case 1, I will gave a toy (DC) to my daugther, so, she play the DC of the play my DSLR.

[playforfun]

Thanks for your advice. Using smaller f value is not an option due to not-enough lighting. Using external bounced flash (I have one) is ok but I don't want it fire all the time. Will you share your experience with what lens to use with build-in motor in your situation, and are you satisfied with it?

[whispermakers]

你咁既情況比支神鏡都未必ok.
室內(對焦距離短), 大光圈(景深淺), 仲要加上對焦物高速前/後移動(對焦距離不斷改變). 用d3都唔一定對到焦.
收光圈+推高iso係唯一方法, 再唔係就用連拍, 希望可以中到焦.

[IpKKin]

我都認為收細返光圈會好D。

[playforfun]

多謝各位賜教... 看來我要另外想下辦法了...

[kingkonghk]

加強室內照明最好, 要影相時開燈, 影完關左佢

[playforfun]

加室內照明, 看來是最正經濟實惠的一條路了