One more question. Is servo a tool to cope with shake? Does it refocus fast enough?
One more question. Is servo a tool to cope with shake? Does it refocus fast enough?
By @Mark30Croton
If, by servo, you mean the stabilization built into cameras or lenses, then yes, stabilization will help by giving you a couple of stops of additional room. If you could hold steady at 1/250s without stabilization, you may be able to get shake-free images at 1 stop (1/125s) or two stops (1/60s) lower than without (possibly more, depending on your gear and your personal steadiness).
If, by servo, you mean the servo mode of focusing, this probably won't help against shake, because shake is usually a side-to-side problem, while servo focus compensates for distance (toward and away).