speed on #11 is perfect

so what speed did you try? 

My previous calculation was wrong.  At 2400 RPM, it is 40 turns per second.  So, at 1/40 speed, you would have gotten one full turn.  In other words, speed at 1/160 give you the 1/4 turn.

Some of your shot (#4  for example) the speed was too slow to see the propeller. 

Overall, these are all very nice pictures.  Not many people have a chance like this in their life time. 

所有跟帖： 

• 快门速度，我从1/30秒试到1/250 秒。 -HawaiiBlue- ♀ (189 bytes) () 08/07/2011 postreply 20:22:13