Last edited by fess67; 16-09-2011 at 10:26pm.
Australia never used the SA80, I think you meant the F88 Aus-Steyr rifles - more accurate but lacked the killer punching power of the old SLRs - which used to strike fear into North Vietnamese and VC troops in VN for its ability to punch through vegetation and cover unlike the M16s the Americans had back then.
Just use Da Grip! http://www.joemcnally.com/blog/2008/03/10/da-grip/
It varies every time. I have hand held the H2 & 55-110 (all 3. something kgs of it) at 1/30th - but it was not a windy day, I was fresh not tired and the light was good. Other days I've had problems at 1/320! As was said, test yourself and your lens and don't push the boundaries if the photo is a special/unrepeatable. And even if you do not have a tripod with you, there is often a rock/pole/sign/fencepost etc to steady yourself or the camera against.
Odille
“Can't keep my eyes from the circling sky”
My Blog | Canon 1DsMkII | 60D | Tokina 20-35mm f/2.8 AF AT-X PRO | EF50mm f/1.8| Sigma 150-500mm F5-6.3 APO DG OS HSM | Fujifilm X-T1 & X-M1 | Fujinon XC 16-50mm F3.5-5.6 OIS | Fujinon XC 50-230mm F3.5-5.6 OIS | Fujinon XF 18-55mm F2.8-4R LM OIS | tripods, flashes, filters etc ||
The OP's original question was does this rule of thumb change because you are using a zoom lens. The answer is no, if you are shooting at 50mm with a prime or a zoom set to 50mm they are still both 50mm. As said it is only a rule of thumb and many variables come into the equation, the main one being the user some are unable to handhold anywhere near the rule of thumb level while others such as experienced shooters can handhold at much slower speeds. My best shooting was a 10 shot 3/8" group at 100 yards using a self built 222 rimmed on a single shot Martini Cadet Action with a 24" x 1" dia. heavy barrel. As with a rifle I find the heavier the weight of the camera the easier it is to hand hold.
Keith.
Joking aside, the ability to effectively use a firearm and take photo's hand held have a lot in common.
I.e. stance, brace, aim, breathing and trigger technique.
Thanks to everyone for the various answers.
Robert
4WD Exposure - capture the image!