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DIY parallelogram mount designs?

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#1 jxk

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Posted 26 June 2019 - 03:18 PM

I'm looking to build my own parallelogram mount for a tripod I have (Benro KH26NL). Does anyone have any suggestions on designs, how to go about doing this, etc.? The maximum weight on the Benro is 11 lbs., is it reasonable to build a p-gram within that weight? I came across these plans, which is generally what I'm looking for, though I'm open to ideas. 


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#2 photoracer18

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Posted 26 June 2019 - 03:31 PM

The parallelogram puts most of its weight off the side of the tripod so the load rating of tripod shrinks a lot under that (even when a counterweight rod is added). Based on the companies who made those things that we used to sell I am thinking that tripod is way too light. Most of my tripods are Bogen 3021/3221W which have a 13# weight limit and I consider those too light for my heavy Vixen 11x80 binos.



#3 clearwaterdave

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Posted 26 June 2019 - 05:50 PM

Here's mine.,easy to put together..with a little inginuity.,inexpensive.,a one hand carry.,fun to use.,cheers.,

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#4 Rich V.

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Posted 26 June 2019 - 06:39 PM

I'm looking to build my own parallelogram mount for a tripod I have (Benro KH26NL). Does anyone have any suggestions on designs, how to go about doing this, etc.? The maximum weight on the Benro is 11 lbs., is it reasonable to build a p-gram within that weight? I came across these plans, which is generally what I'm looking for, though I'm open to ideas. 

That's a very light tripod for a parallelogram.  Just a p-gram and its counterweight will be pushing its capacity even before you've added the binoculars.  You'd have to have a very light setup indeed.

 

Weight adds up fast with a p-gram + CW; it will substantially exceed the weight of the binocular.  I strongly suggest a higher capacity tripod if you're going to the trouble.



#5 Mike G.

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Posted 27 June 2019 - 09:13 AM

I use my p-gram mount with Vixen 20x80's on an old CG5 tripod - the ones with 2" stainless steel tubular legs.  stable as a rock.



#6 Myk Rian

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Posted 27 June 2019 - 09:59 PM

I use a surveyors Tpod. With my P-gram, 20x80 Oberwerks, and 15 lbs of counter weight, it holds the approx 25-30 lbs very well.

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#7 Xeroid

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Posted 28 June 2019 - 02:16 PM

Here's some info on a home brew Parallelogram that's easy to do:

 

- Oak 1" x 2"  (3 or 4 6 foot lengths)

- Two Upper LONG bars are 38" long

- Two Lower Short Bars are 18" long

- Pivot Vertical post is 12" long & made from two 1"x 2" pieces

- Bino Vertical post is 8.5" long & made from two 1"x 2" pieces

- 1/2" Nylon Spacers between long/short bars and vertical post

 

- 1/4" x 4.5" bolts with LOCK Nuts adjusted to allow movement without slipping + fender washers.

- Kmart 5 lbs. Barbell, postion and type can be customized.

 

-Bino wood hinge allows left/rigth & up/down movement of bino with adjustable friction to limit movement.

 

- The bino's.are 10x42 and are not too heavy.

 

The Parallelogram works very well and the Oak makes it very strong.

 

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#8 Saturnalia

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Posted 12 August 2019 - 04:26 PM

That's a good looking P-mount in oak Xeroid - do you have a better pic of the bino head end for clarity...?



#9 S.Boerner

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Posted 12 August 2019 - 05:35 PM

Mine looks like this:

new look down mount-04.JPG


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#10 Saturnalia

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Posted 15 August 2019 - 11:15 AM

Very useful thanks.



#11 RRMichigan

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Posted 16 August 2019 - 11:03 AM

I'm looking to build my own parallelogram mount for a tripod I have (Benro KH26NL). Does anyone have any suggestions on designs, how to go about doing this, etc.? The maximum weight on the Benro is 11 lbs., is it reasonable to build a p-gram within that weight? I came across these plans, which is generally what I'm looking for, though I'm open to ideas. 

 

Here is one I built over the course of a few evenings this past late June. (I had yet to stain the wood)

I had no specific plan to work from other than looking at what others have done and incorporating what I thought were the best design elements. The only error I made was to build the tripod legs too short. I later added about 8 more inches in height, to accommodate my using the device when standing and looking at the Zenith without bending at the knees. It still folds low enough to observe in a lawn chair as well. It works perfectly for me and I have already had several sessions this summer using it to view Jupiter, Saturn and M31 (later at night).

 

 

IMG_20190710_204302 (Small).jpg


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#12 S.Boerner

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Posted 16 August 2019 - 11:45 AM

Move your long arm to the top and you should be able to get a bit more height. 



#13 Napp

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Posted 16 August 2019 - 02:33 PM

Mine is very similar to yours.  I used a more metal.  Mine was based on the design and pictures at http://astro-tom.com...cular_mount.htm

 

Note the red dot finder.  Really helps find targets quickly.

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#14 Subhematoma

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Posted 04 September 2019 - 10:07 PM

Here is one I built over the course of a few evenings this past late June. (I had yet to stain the wood)

I had no specific plan to work from other than looking at what others have done and incorporating what I thought were the best design elements. The only error I made was to build the tripod legs too short. I later added about 8 more inches in height, to accommodate my using the device when standing and looking at the Zenith without bending at the knees. It still folds low enough to observe in a lawn chair as well. It works perfectly for me and I have already had several sessions this summer using it to view Jupiter, Saturn and M31 (later at night).

 

 

attachicon.gif IMG_20190710_204302 (Small).jpg

That is so very pretty. What was the total length of the legs once you added the eight inches if I may ask?

 

still trying to see how you attached the column to the tripod.  I assume the column swivels on the tripod?


Edited by Subhematoma, 04 September 2019 - 10:09 PM.


#15 Sean Wood

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Posted 08 September 2019 - 02:45 PM

There's nothing really super hard about a P-mount. The most critical part is the hole spacing. If possible clamp together the mating parts like the uprights for each end of the parallelogram and the upper and lower arms or anything that will have the same hole spacing and drill through them all at the same time. You'll also want to put a plastic washer of some form between the joints that move against each other. I used Nylon fender washers that I had found at my local hardware store but if you wanted to go budget, discs cut from a milk jug would suffice as well. 

A note on materials. If you make it from wood, no matter how well you seal it it will still be susceptible to expansion and contraction due to environmental humidity. If you make it from aluminum it will be susceptible to expansion and contraction due to temperature. neither of these materials expansion will be severe enough to make the mount unusable/inaccurate BUT it can make the joints tight or loose and change the amount of friction in the joint which will directly effect over all user experience. Putting hand knobs on the joints can make quick field tension adjustments much easier.



#16 RRMichigan

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Posted 16 September 2019 - 03:47 PM

That is so very pretty. What was the total length of the legs once you added the eight inches if I may ask?

 

still trying to see how you attached the column to the tripod.  I assume the column swivels on the tripod?

I will try to get the leg measurements for you.

Yes, there is an azimuth swivel between the tripod head and the top portion. It uses plastic sheet bearings and moves effortlessly. I actually incorporated a true, press-tight sealed bearing originally but had difficulty getting wood to hold it in place properly.

After I lengthened the legs I have no problem looking anywhere. I am 5'11" and someone well over 6 foot could use this without bending.

Note: This was all built from (good) scrap wood made from Swedish shipping crates. The counter weights are hydraulic motor geroters of different thicknesses, painted. The cost of all the hardware used was perhaps $15. I over-bought hardware last winter knowing I would build this when the weather was warmer and did not yet have an exact plan nailed down.


Edited by RRMichigan, 16 September 2019 - 03:52 PM.


#17 RRMichigan

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Posted 16 September 2019 - 03:47 PM

Mine is very similar to yours.  I used a more metal.  Mine was based on the design and pictures at http://astro-tom.com...cular_mount.htm

 

Note the red dot finder.  Really helps find targets quickly.

 

Very nice work there.



#18 RRMichigan

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Posted 16 September 2019 - 03:54 PM

Move your long arm to the top and you should be able to get a bit more height. 

 

Now you tell me. LOL. Actually, heightening the legs took care of the issue. But thanks.



#19 RRMichigan

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Posted 17 September 2019 - 10:06 AM

That is so very pretty. What was the total length of the legs once you added the eight inches if I may ask?

 

still trying to see how you attached the column to the tripod.  I assume the column swivels on the tripod?

I measure the tripod legs and they are 48 inches in length.




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