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Re: [OM] Forbidden Shutter Speeds

Subject: Re: [OM] Forbidden Shutter Speeds
From: Moose <olymoose@xxxxxxxxxxxxx>
Date: Thu, 01 Jan 2004 15:35:37 -0800
This seems to vary a great deal with different tripods.

1. I inherited from my father a very nice Cullman tripod. It has those small QR plates someone was recently praising, quick, convenient flip locks for legs and leg angle supports. Really nice...but it almost rings like a bell with vibration from the shutter of an OM. Still quite usable with hand damping and/or weight damping, but one must pay attention. This one has an integral head.

2. The Velbon 343e is tiny, light and a bit spindly, but vibrates no more than the Cullman and is easily damped with hand pressure. This comes with a tiny, but actually usable Velbon ball head and cna accomodate others.

3. The Hakuba HG-6240C has twist locks and is slower to set up and adjust than the first 2, but the carbon fiber is important for more than just weight. This tripod seemingly doesn't support harmonic vibration at all, very 'dead', seemingly more so than the Bogen CFs I tried in the store. The Bogen leg locks were more convenient, but they were so obviously less steady, especially with that thin bottom section extended, that I chose function over convenience. The Bogens were also pretty pricey, as I recall. The Hakuba CFs seem to be identical to but cheaper than the Velbons, except for an aluminum spider, rather than magnesium. A very fine tripod. For travel it sports a Velbon PH-253 head, a way better performer than the cheap/small Bogen junk, and small and light to boot. At or near home, it sports a Manfrotto 410 geared head.

4. The Bogen/Manfrotto 475(B) tripod is massive enough that the shutter of an OM doesn't seem to excite vibrations in it, even with the center column extended a bit. Don't want to carry this thing very far though. Has a 3047 head.

AG Schnozz wrote:

Ah, to start the new year off with real OM content:

There is a range of shutter speeds that I generally try to
avoid.  Namely the 1/30 - 1 second range.  When using a tripod,
these speeds tend to create vibration induced image degradation.

I haven't gotten very scientific on this, but I'm curious if we
have specific harmonics being setup with certain combinations of
lenses, bodies, winders/mds and tripods/monopods?

I'm sure such specific differences exist, but testing would rival or exceed Gary's lens test efforts. The number of combinations is staggering.

Moose



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