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本帖最后由 motor 于 2010-5-19 00:16 编辑
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1 V+ @- Q4 Z7 k0 G+ VI have considerable field time with both the BH-55 (which I own) and the M20 (which my neighbour owns). Both are exceptionally good ballheads and imo represent the cream of the ballhead crop right now. I havn't noticed a huge difference in smoothness or 'sweet spot' between them in my use. I would say with larger lenses, a larger sweet spot is slightly more noticeable on the M20 but the BH-55 has a better panning lock in my opinion (never had it creep when locked down tight and carrying a heavy set-up over my shoulder, the M20 has creeped - though ever so slightly). 2 [* t. y/ E( W( G
5 z9 y% T) F& NAs for cold weather shooting, I have used the BH-55 by the Red River in Winnipeg at a temperature of about minus 40 with windchill and not had a lock-up problem. I have only read a few complaints (which are getting quite dated now) about Markins locking up in the cold, and even then it was from breathing on the head while looking through the viewfinder, composing the shot. I am in Toronto now and have only used my neighbour's M20 since coming here. I have used it by Lake Ontario in the winter here at well over minus 20 temperatures with the windchill and not had a lock-up problem. Safe to say my experience supports it as a good cold weather ballhead in that regard.. z' I5 P, h2 W3 |
U# F- o. d6 h {- |These are 2 great ballheads that are mainly different in my experience in ergonomics. The M20 has a small form factor, smaller knobs, and an inset thumb tension limiter. From a weight to load ratio and compact size point of view it is a clear winner, although weight to load ratios are a little over done (I mean who is going to load more than 40 pounds on their ballhead? What tripod supports 80 pounds?). If I am going on a hike I likely want to go as light as possible and take the Markins. The RRS heads are bigger, squatter and have large knobs and an independent tension limiter knob. I like using the RRS head better in the cold because it is easier to use it with mitts on (gloves do nothing in Canadian winters). That being said, the Markins is not hard to use, but if you have to make changes to the tension, you will have to use your bare hand in my experience, and touching cold metal is never fun The pan lock as well is hard to use with mitts on.# Z4 w F2 _. [ r2 b
$ [. H3 {# `2 e+ D/ T. }; { s3 {I suppose in summary if I lived in a purely warm climate and I hiked all the time I would likely favour the Markins for its smaller form and weight. However I don't and for cold weather shooting I prefer the RRS for the large knob size, and ease of use with mitts on. Bottom line though is you cannot make a wrong choice here, you will be happy with either. |
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