[sunny4791]

本人有canon 7d,有15-85mm，70-200mm小小白is，10-22mm请问ching什么是安全快门谢谢！

[underwong]

簡單d講, 如果你用緊200mm焦段影野, 快門就要大慨高過1/200s 為之安全快門!

[alewong]

For 7D, safety shutter of 200mm should be 1/320 (x 1.6 factor of APS-C)

[Laza]

>>For 7D, safety shutter of 200mm should be 1/320 (x 1.6 factor of APS-C)

That would be the on the safe side, but for a lens with "Image Stabilization
", I believe the lowest safety shutter speed can be even slower.

I mean for a 70-200 F4 IS lens claiming to have a 3-step advantage of IS, at the tele end of 200mm, the lowest shutter speed should be (1/320) x 2 x 2 x 2 = 1/40s.

[叮噹仔]

簡單d答,
"請善用google search , 或wikipedia"

[reflexboy]

究竟何謂安全？你嘅安全同吾同我嘅安全？影靜態相嘅安全等唔等如影動態嘅安全？一時話關crop factor事，跟住又話關pixel事？其實係咩一回事？

[layer]

關人忍事

[sunny4791]

谢谢各位ching我会慢慢学习！