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FORUMS General Gear Talk Tripods, Monopods & Other Camera Support
Thread started 30 Jan 2018 (Tuesday) 17:00
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Sandbag Weight for Tripod?

 
kcrossley
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250 posts
Joined Feb 2009
Williamsburg, VA
Jan 30, 2018 17:00 |  #1

How much stabilization weight should I add to a 6 lb. Davis & Sanford carbon fiber tripod with a Canon 70D and kit lens that's being used for video? Is 10 lbs. good?


Cameras/Lenses: Canon 80D, Canon 70D, Canon 18-55mm, 50mm, 10-18mm, and 55-250mm Lenses
Accessories: Case Logic SLRC-206 Backpack, Canon Speedlite 430EX III-RT, Canon RC-6 Wireless Remote, Davis & Sanford TR653C-V9 Carbon Fiber Tripod, Aputure Amaran HR672 LED Light Kit, Kamerar DF-1M Softboxes

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John ­ from ­ PA
Cream of the Crop
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Southeast Pennsylvania
Post has been edited 20 days ago by John from PA.
Jan 30, 2018 17:38 |  #2

kcrossley wrote in post #18552812 (external link)
How much stabilization weight should I add to a 6 lb. Davis & Sanford carbon fiber tripod with a Canon 70D and kit lens that's being used for video? Is 10 lbs. good?

Think about it. You have a tripod rated for six pounds and tripod ratings are often inflated. So I would start with about 6# less the weight of the 70D and lens so probably add about 4#.

By the way a 1/2 gallons milk bottle is about 4#. If you are hiking in to some location consider carrying a 1/2 gallon bottle full and dump it prior to hiking out (or drinking it).




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johnf3f
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Wales
Jan 30, 2018 18:44 |  #3

Just hang your backpack underneath your tripod. If that is not enough and/or you need to carry weights for your tripod then you need a better tripod.

Sorry that is just the way it is.


Life is for living, cameras are to capture it (one day I will learn how!).

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Wilt
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Jan 30, 2018 18:58 |  #4

Under what circumstances are you anticipating the need for supplemental weight on your tripod?


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kcrossley
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Jan 30, 2018 19:48 as a reply to Wilt's post |  #5

Basically, the not wanting the talent to tip over my expensive camera circumstance. :)


Cameras/Lenses: Canon 80D, Canon 70D, Canon 18-55mm, 50mm, 10-18mm, and 55-250mm Lenses
Accessories: Case Logic SLRC-206 Backpack, Canon Speedlite 430EX III-RT, Canon RC-6 Wireless Remote, Davis & Sanford TR653C-V9 Carbon Fiber Tripod, Aputure Amaran HR672 LED Light Kit, Kamerar DF-1M Softboxes

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John ­ from ­ PA
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Southeast Pennsylvania
Jan 30, 2018 20:22 |  #6

By the way, is the tripod the Davis & Sanford TR653C-V9 Carbon Fiber that you had a year or so ago? If so it has a 9# capacity, not 6.




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Left ­ Handed ­ Brisket
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Jan 30, 2018 20:25 |  #7

kcrossley wrote in post #18552941 (external link)
Basically, the not wanting the talent to tip over my expensive camera circumstance. :)

get insurance.

and then maybe just put some weight on the floor below the tripod and tie up to the center post. no weight on the tripod, but a little extra protection.


PSA: The above post may contain sarcasm, reply at your own risk | Formerly he's gone before apostrophe-gate | Not in gear database: Canon 70-210 3.5-4.5, Auto Sears 50mm 2.0 / 3x CL-360, Nikon SB-28, SunPak auto 322 D, Minolta 20

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Wilt
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Post has been last edited 18 days ago by Wilt. 9 edits done in total.
Jan 30, 2018 20:27 |  #8

kcrossley wrote in post #18552941 (external link)
Basically, the not wanting the talent to tip over my expensive camera circumstance. :)

Good luck carrying that much weight!

We need to consider that the tripod provides a lever arm advantage over any downforce exerted by any weight, to defeat the small radius of the tripod footprint. Simple Physics, something someone who studied Physics even at the high school level will tell you about.

32 lbs. lateral force exerted at the top of 6' tall tripod is about 190 lbs.ft. of torque, assuming the radius of the tripod footprint is 1.5': we need 130 lbs. of downforce on a single leg to offset to counterbalance that lateral force.
But if the weight is simply centered on the stand, the mechanical advantage of the weight at the leg end is lost, and it takes LESS force to tip over the tripod...an M.E. or phsyicist is needed to supplement my very rusty memory here! So I just did a test using a tripod extended to 5' height, and measured the forces with a kitchen food scale.

  • With no weight on the tripod (no camera), it takes less than 0.75 lb. of force to move the top of the tripod laterally (and moved far enough it will eventually fall)
  • With 5 lbs. (camera+lens) on the tripod, it takes less than 1.75 lb. of force to move the top of the tripod laterally (and moved far enough it will eventually fall)
  • Adding 8 additional lbs. of downforce at the tripod center caused the lateral force to increase to about 2.2 lbs. of force to move the top of the tripod laterally (and moved far enough it will eventually fall)


Most of the time, folks put weight at the tripod center to offset the forces of WIND laterally, when the camera+lens provides not a lot of surface area for the wind to push against. Not for preventative measures against people!

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Canon dSLR system, Olympus OM 35mm system, Bronica ETRSi 645 system, Horseman LS 4x5 system, Metz flashes, Dynalite studio lighting, and too many accessories to mention

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mikeinctown
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Joined May 2012
Cleveland, Ohio
Jan 30, 2018 22:00 |  #9

I like the water jug idea. I've also used my camera bag and have also used bungee cords to hold the tripod down. Pick up a couple tent stakes and press them into the ground with a couple bungee cords if outside.


Canon EOS 1D X | Canon EF 24-105mm f/4L IS USM, EF 70-200mm f/2.8L IS II USM | Sigma 150-600mm F5-6.3 DG OS HSM | C |

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Littlejon ­ Dsgn
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Sandy, Oregon
Feb 01, 2018 09:24 |  #10

If the sole purpose is for the talent to not knock over your expensive camera and your in a studio setting then I would forget about the weights and get insurance. If your on location I would forget the weight and get insurance. I can tell you from 4 years of shooting talent in a studio and location setting, the only one that has ever damaged any of my gear was me or my assistant (aka wife). The talent is normally not close enough to the gear to do any damage to it.

Also the insurance route takes care of so many what if situations. Gave me the piece of mind to take my kit onto a canoe on Lake Louis in Banff with my wife and daughter. I was assured if my entire kit sank to the bottom because we tipped the canoe my insurance would cover it. It didn't but it sure was nice to know.

If your really worried and in studio, just get a couple sand bags and put it around the feet on the floor, I can say i would get tired of moving the weight around while shooting real fast.




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Wilt
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Feb 01, 2018 11:54 |  #11

You could just consider putting the tripod on a wheeled dolly, so that anyone bumping into the tripod merely sends it rolling across the floor rather than toppling it. Shooting video the rolling tripod would provide for smoother movement of the camera for angle changes, too.


You need to give me OK to edit your image and repost! Keep POTN alive and well with member support http://photography-on-the.net/forum/donate.p​hp
Canon dSLR system, Olympus OM 35mm system, Bronica ETRSi 645 system, Horseman LS 4x5 system, Metz flashes, Dynalite studio lighting, and too many accessories to mention

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Sandbag Weight for Tripod?
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