Showing posts with label carbon-fiber. Show all posts
Showing posts with label carbon-fiber. Show all posts

Monday, August 24, 2009

Travel Tripod: My quest paid off

In the first article of my Tripod Series, Traveling with a tripod: It's love — Hate, I discussed the benefits of using a tripod when traveling. I’ve been taking a tripod with me for years while traveling. You can’t take night photographs, or other long exposure shots without a tripod.

Gitzo GK2580TQR with RRS BH-40LR headIn the second article in the Series, How to Choose a Tripod, I discussed the various criteria to use in choosing any tripod, including one for travel.

So what makes a Travel Tripod different than any other tripod, and why might choosing a Travel Tripod require us to make compromises, and force us to rank our criteria by their importance to us?

When choosing a Travel Tripod there are two criteria briefly mentioned in the second article in my Tripod Series which makes the choice difficult. A Travel Tripod has to be easy to pack and take on your trip. In addition, presumably on most trips, you’re going to be carrying it around for long periods of time, so it needs to be very light weight.

My main tripod is made of carbon-fiber. Even so, it weighs about 6 lbs with the head. Carrying it around for several hours at a time can be very tiring. Folded it won’t fit in my carry-on, no matter how it’s positioned.

I chose the Gitzo GK2580TQR Travel Tripod (legs), using my criteria from How to Choose a Tripod. This is how I went about it:
  • I’m about 66” tall. When I put my Nikon D200 atop the head, on the legs, it adds about 3” to the tripod’s height. My eyes, like most adults are about 4” or so below the top of my head. To use the tripod without raising the center column, Therefore to be comfortable for me, I prefer the tripod to be at least 50” high with the legs at their smallest angle setting with the center column down.
  • While I can’t attach the head to the legs without the center column, I can purchase a shorter center column to replace the current one, so the camera can be on the tripod even lower to the ground than I can get it now (16”).
  • The tripod legs are unbraced.
  • The tripod legs are made with carbon-fiber, using the pultrusion method of manufacture, which has the best weight to stability ratio.
  • The tripod legs weight 3 lbs and with the head/clamp I chose, just under 4 lbs aggregately, better than I hoped for.
  • Folded Size, is the 2nd critical criterion specific for travel tripods. Considering the size of my allowable roller carry-on, and the size of my camera/computer backpack, I was very pleased that my tripod is just under 17” long folded, and less than 4.5” wide.
  • The tripod must be able to easily carry the weight of my D200, and more. The tripod must support the camera, the heaviest lens I will use with it, my flash with bracket, head/clamp, and the plate on the camera to which the clamp holds on. (More on that in a moment.) The tripod legs support 15.4 lbs, which is sufficient.
  • The diameter of the tripod’s legs are a critical specification for maximizing the tripod’s resistance to torque. I plan to use my Nikon 80mm-400mm lens with this tripod. It’s length at 400mm, and its weight are somewhat less than a typical 300mm prime lens, so I chose to use legs which have the first leg section at a diameter of 28mm. I’ve now tested the tripod. It holds my equipment very steady, enough for long exposure shots.
  • The tripod head, which sits atop the legs is what allows you to move the camera to compose your photographs. For the purposes of this article, it’s enough to say, in my opinion, the ball head is the best choice for Point and Shoot, SLR, and DSLR cameras (mine). In my opinion, the best ball heads are manufactured by Markins and Really Right Stuff (RRS). I’ll have an article on ball heads on the Blog soon. I chose the RRS BH-40 LR ball head.
  • As mentioned in the second article of the Series, the best clamp for SLR/DSLR camera/lenses is an Arca-Swiss style clamp. It allows quick attachment and detachment, and provides a solid, secure base and connection between the head and your camera/lens. I chose an Arca-Swiss lever style clamp by RRS, which allows for instant release of the camera/lens compared to the screw knob style. A point and shoot camera can use a direct screw attachment successfully.
  • Point and Shoot cameras, and lenses need only a flat plate for a clamp to grip. Point and Shoot cameras are light, and flopping them in the ball head to obtain a vertical orientation will not noticeably affect their stability. Long lenses used with an SLR or DSLR camera are usually attached to the head, via a collar, instead of the camera the camera. The camera/lens is rotated in the collar to change orientation. The lens is attached to the head for balance. Otherwise, an SLR/DSLR with lens is attached to the tripod via the camera. I prefer to use an “L” plate with the camera. To vertically orient the camera, you use the short side of the “L” plate keeping the camera/lenses weight directly over the tripod’s central axis, instead of flopping the camera to the side in the head’s slot which substantially diminishes the stability of the tripod. I’m using a RRS flat plate for my long lenses and and “L” plate for my D200.
D200 with 80-400mm lens attached to tripod via lens collar and plate












The compromise one must make, when choosing a Travel Tripod is stability (weight capacity, and resistance to torque) versus folded size, and tripod weight. It’s extremely hard to find a combination which works.
My quest was successful. The Gitzo GK2580TQR tripod meets my varied specifications, and the head and other parts by RRS fit the bill perfectly. By the way, in my opinion Gitzo makes the best tripods. Manfrotto tripods are also excellent, and there are other brands which are highly serviceable.

Please note, however, that if I wanted to use a longer lens, such as a Nikon 500mm telephoto lens for birding, the GK2580TQR legs would not have the necessary stability.

Monday, August 17, 2009

How to Choose a Tripod

Last week I discussed the benefits of using a tripod. Of course, first and foremost the job of a tripod is to hold your camera/lens steady. If your choice of tripod can’t do that one thing, in my opinion, you’ve wasted your money purchasing it.

Choosing a tripod is very personal because it needs to be sized to your height, handle your camera/lens/ancillary mounted equipment weight, and the length (focal length) of the longest lens you will use with it. I think it’s obvious how your height and the camera’s weight come into play, but perhaps not why the length (focal length) of the lens is important.

Travel Tripod with Ball Head and Arca Swiss style clampLens length is important for two reasons. First, the longer the focal length of the lens, the higher the magnification. The more magnification the lens provides, the more any shake or vibration of the lens will cause your photograph to be blurred. Second, the longer the focal length of the lens, the longer the lens will generally be. The weight of the lens extending well past the central axis of the tripod will torque the tripod legs while the tripod is supporting the camera/lens.

A tripod holding a lens with high magnification, and torqued must have sufficient structural strength to prevent image blurring due to movement cause by outside forces such as ground vibration, wind, the camera’s mechanical actions, or human touch.

When we are talking about tripods, we are really talking about 4 distinct pieces which make up the total tripod.
  1. Tripod legs which support everything else.
  2. Tripod head which permits the camera/lens to be moved to compose the photograph.
  3. Tripod head clamp which is used to attach the camera or lens to the tripod head. ¹,²
  4. Camera or lens plate, which is held directly by the tripod head clamp. ¹,²
¹ It is possible to screw the camera or possibly the lens directly to the tripod head, though this does not permit the quick attachment or disattachment of the camera or lens from the tripod/tripod head which I believe is important.

² When using longer lens with a camera you generally attach the lens directly to the tripod head, rather than the camera.

Use the following criteria when choosing a tripod:
  • Height: Ideally the height of your tripod’s platform holding your camera should be at least as high as your eye level with the legs open at their smallest setting angle. Outside you often need one or two legs set at a level lower than where you are standing which makes the tripod feels shorter than it is. Therefore it’s better to have a little extra leg length than not. Remember that the head atop your legs on which the camera/lens will sit will add some inches to the height of the tripod’s legs. This is especially important for travelers as it can reduce the leg length you need for your tripod, which can reduce its weight. Plus, in my opinion you don't want to use the center column to bring your viewfinder to eye level. (If at all possible you shouldn’t use the center column as when up it adds instability to the tripod.
  • Center Column: Many quality tripods have a reversible and removable center column which can help you get a low angle, macro, and close to the ground shot. Some swear the capability to set the center column horizontally is great, but I’ve never thought much of it. There are both smooth and geared columns. I prefer smooth.
  • Leg Spread: The best tripod legs are unbraced with independent multiple angle positioning to work on uneven terrain, and allow the tripod to get low to the ground for such shots as macros of flowers and insects.
  • Leg Composition: Carbon-fiber offers the greatest weight to stability ratio, and is easier to hold in cold weather than aluminum. Unfortunately, carbon-fiber comes at a cost, a significantly higher cost. If you can afford it, you won't regret purchasing carbon-fiber tripod legs. Carbon-fiber can make your tripod legs truly “travel light,” yet strong.
  • Weight: If you’re carrying around a tripod while you’re on your feet all day, your tripod can’t be light enough. My travel tripod (legs) weighs 3 lbs. It’s ball head, with clamp weighs another 18 oz. The legs are carbon-fiber.
  • Folded Size: Ordinarily, most people don’t care about the length of a tripod when folded, but this is very important for travel tripods. You want it to fit in your airplane carry-on if at all possible, otherwise you’ll have to pack it in your checked luggage. My travel tripod closes to just 16.75 inches.
  • Leg Diameter: You need a diameter which enables the tripod to carry the necessary weight, and resist torque, to be a solid and steady platform for your camera/lens. Many tripods, while being able to withstand the weight, can’t resist the torque, and so still shake and vibrate when used.
  • Head: In my opinion, for most still photography, the best and most versatile head to use is ball head, but there are many brands and choices. To help narrow your choices down next week in my third and final article of the series I will tell you which brands I prefer.
  • Clamp: There is no better clamp to attach your camera/lens to your ball head than the Arca-Swiss style clamp. It allows quick attachment and detachment, and provides a solid, secure base for your camera/lens. I use one myself, with a quick-release lever.
  • Camera/Lens Plate: There are two basic styles of plates which bolt to your camera, to attach it to an Arca-Swiss style clamp; straight, and “L.” I prefer the “L” plate for my camera, as it allows me to quickly switch between horizontal and vertical orientation, and keeps the weight of the camera/lens directly over the central axis of the head, maintaining maximum stability. A flat plate requires the camera be flopped to the side, placing the camera/lens weight to the side of the head instead of over it.
Travel Tripod folding for packing in carry-onI’ve now discussed the benefits of using a tripod, and the general criteria you should use to compare potential tripod choices, to find one which meets your needs.

Next week, I’ll discuss real world examples of tripods and tripod heads, clamps, plates, and explain how to use the criteria to choose a travel tripod. I’ll warn you up front, choosing a travel tripod, at this time, requires compromises, especially if you want to use a long lens on your camera.