I have three pieces of black bamboo.
1/2" OD, 61" long, 5.10 ounces.
3/4" OD, 60.5" long, 7.70 ounces.
1 1/4" OD, 61" long, 14.55 ounces.
The .5" OD is stiffer than I need for a tarp. I could not get it to buckle.
I am going to use 42" long poles, so that is about 3.9 ounces for the 1/2 OD.
Extrapolating, a 3/8" OD is 3 ounces, which isn't too bad. The CF pole from MLD is 1.65 ounces.
In the meanwhile what I have will allow me to evaluate using a tarp.
Next time I am out on the west coast I will cut some 3/8 and 1/4 OD pieces.
If I had a metal lathe I would clean up the ends and attach a thin metal sleeve.
Unfortunately I will have to do a hack.
The original intent of the bamboo was to try using hiking poles. I was not sure what diameter would work and what they would weigh once they dried. The 3/4" OD is stiff enough for a hiking pole, but probably too heavy for most. I can use the 1 1/4" as a pullup bar.