JacktheMassey wrote:
So why do some RSS travel tripod top leg section only 28mm?
From their website, the intended purpose of their "Travel Tripods,"
"Travel and general photography; the perfect choice for compact gear combos. Common compact gear includes mirrorless system and standard dslr cameras with 70-200mm/f2.8 & 300mm/f4 equivalent telephotos."http://shopping.na1.netsuite.com/s.nl/c.3705077/it.A/id.7822/.fYou probably don't need (nor want) a tripod with 37-43mm legs, that weigh 4 lbs or more, when traveling, when all you will be using is a shorter lens. This is the kind of research you should be doing, not reading Amazon user comments from the unqualified, but well-intentioned readers wanting to share their experiences.
I personally have two tripods - a "travel" tripod that weighs 2.3 lbs with 28mm top tubes that I have used with a 100-300 F4. It is light, easy to pack or attach to my camera backpack, and a decent solution for shorter focal lengths, like when I am doing landscape and even closeup and flower photography. I've tried to use it with my longer lenses and found it had too much vibration. For that I use a "big lens" tripod with 37mm top tubes. It weighs 4 lbs, and I have used it with great success, with up to an equivalent focal length of 1260mm (600mm+1.4X TC on a Nikon D300 1.5 crop camera). To be honest, the shots with that combination are not ones I would take every day, and did require some discipline and flawless technique - but I got the shots anyway.
For what it's worth, the smaller tripod has a load rating of 55lbs and the bigger one 66 lbs. So as you can see, even though the smaller $300 tripod can "hold" 55 lbs, it is not even close to suitable to providing the necessary stability to keep an 8.5 lb load (Sigma 150-600 Sport with a D800) from vibrating. Load capacity has NOTHING to do with stability. I do use either a beefy Arca-Swiss Z1 ball head or a Mafrotto 393 gimbal which works surprisingly well for my purposes. I suppose if I wanted a gimbal that locks I would get a Wimberley or similar, but I think that defeats the purpose to some degree. I wanted a gimbal that was not a cantilever design, and would have no trouble with a 14 lb lens and camera combo, and did not require a home equity load to purchase. So I got the 393 as a stopgap, thinking I'd wait a few years and upgrade. That was 11 yrs ago.
The image below is a 2976x2474 (7.4 mp) crop from a 4288x2848 (12.1 mp), using a D300, 600mm F4, 1.4 TC, 1/10 sec, F8, ISO 400. Equivalent field of view was 1260mm (600x1.5x1.4). Support was a Feisol CT3472 and a Manfrotto 393 Long Lens support.