I have shot hand-held with a variety of small format cameras,* some quite light (Olympus XA, 225g) and others fairly heavy (Minolta SRT 101, 1kg) and all have been quite hand-holdable with reasonable care given to technique and adequate shutter speed. Yes, there are endless discussions regarding mirror slap (should be ancient history by the time the shutter opens unless one's person is incredibly resonant), shutter shock, and SR-induced blur. Strangely, ground movement is seldom a matter of concern.
My technical rules go something like this:
- Follow the 1/focal length rule for hand-hold or at least keep it firmly in mind as you break it
- If you can see the jiggles in the viewfinder, use a tripod
- If the lens/camera combo feels heavy or poorly balanced, use a tripod
- If one is unclear as to good hand-hold technique and/or has a history of shots being ruined by camera movement, use a monopod or tripod as rule of course
- If no tripod, give it a try anyway
As for hand-hold technique:
- Don't get old. I could hand-hold reliably to 1/15s with a 50mm lens when I was 18, but no more.
- Pay attention to shutter release stroke. What we think happens with the finger alone may involve actual movements in the full arm and shoulder.
- Be relaxed. The body at tension tends to involuntary movement.
- There are several schools of thought regarding breathing and timing. My practice is to avoid shooting when breathing hard or while not breathing. If possible, I tend towards quiet slow breathing with shutter release towards the end of exhale.
- In the decisive moment, simply take the shot. It worked for Cartier-Bresson, but he was famous for lapse of technique.
As for tripods:
- Ground movement is real, particularly if ground is a city street or a bridge
- Don't use a wimpy tripod. If you don't know if your tripod is wimpy, it probably is.
- Tripod and head capacities are usually wildly overstated
- An unbalanced load is a load at tension and tension has the potential of amplifying camera vibrations
- Adding weight (usually at the "spider" or wrapped around the legs) may help defeat wind-induced hum
- Suspending weight is controversial
- More rules and concerns than might reasonably be imagined...stuff like moments of inertia, center of mass, etc. etc. etc.
- Tripod spikes may be used to good advantage when confronted by predators. If the predators are human, use of the tripod as a club is often effective.
Steve
(...has no inclination to do a controlled study of added weight to a Pentax K-3...)
* Twenty-some models at last count.