Camera Shake / Resonance of Tripod
On the previous post, the top photo taken by 200 mm Lens which was
held against the Camera body, was inevitably shaky and couldn’t been
properly focused. When I realized that there is Catkins, I set-up a tripod
and 500 mm lens —– but after few clicks, I discovered that the photos
were utterly fuzzy. => I increased ISO speed hence shutter speed, still
the situation wasn’t get any better.
Have look the information of the photo, left bottom under the Histogram =
O mm lens mean Non-Canon lens, ISO 1600 and Shutter speed 1/2500 Sec.
This was not off-focused image. ( no double line, typical to Mirror lens there)
As the photo on the tripod showed the funny shake, I resorted with
hand held. And strangely (you say), it produced much sharper image.
This time, ISO 400 and the Shutter speed was 1/ 320.
It was well known only to few people = a Shake caused by the Resonating
equipment. = In here, 500 mm lens, Canon 5D, and Gitzo Reporter Tripod
almost fully extended has happened to resonated and gave very fine vibration.
(If the extension of the tripod was shortened, there may not be a vibration.
= that is the tricky part of the [Resonance] = hard to predict though, it is
possible to test => hit the set-up of the tripod with a stick and listen the
sound = if they makes good long sound “Boom” = Resonation suspected ! )
The photo above (heavily clopped image) by the
Tamron 500 mm Mirror lens, hand held and
ISO 1600, the Shutter speed was 1/8000 ! = I like a glare of branches.
(Human body is a dumper = wouldn’t resonates —– thanks goodness !)
May be I should find the frequency of this resonating vibration, because
Anti-Vibration system in the lens may not have an effect to higher frequency.
(I tested it with Anti-vibration of 70~200 F2.8 lens though as it got totally
different weight and the balance, the same resonance wasn’t replicated.)
May be I should talk about the Tripod in near future.
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[…] (And I don’t think this photo is showing any good quality —– never mind If I needed I could have used proper Lens. —– and I wouldn’t insist “fuzzy image” for this kind of picture ! —– You can see properly photographed catkin’s image.) […]