Induro AT203 Test Results

The Induro AT203 is a modular systematic style tripod, made from aluminum.  A rare combination, and indeed no longer made.  This tripod turned out not to be particularly stiff, which is no surprise.  However, the damping is exceptional for an aluminum tripod.  I don’t know yet exactly what design decisions improve the damping.  One guess is that the rubber platform style foot makes a difference.  This will be the subject of a future test.

NameInduro AT203
Stiffness About Vertical Axis633 +/- 4 Nm/rad
Damping About Vertical Axis0.342 +/- 0.034 Js/rad
Stiffness About Radial Axis1446 +/- 9 Nm/rad
Damping About Radial Axis1.46 +/- 0.15 Js/rad
Retail Price$180
Weight5.29 lbs (2.4 kgs)
Manufacturer weight rating28.7 lbs
Maximum Height56.4 in (143.3 cm)
Minimum Height14.8 in (37.6 cm)
Center ColumnNo
Base Diameter1.6 in (4.1 cm)
Folded Length25.5 in (64.8 cm)
Folded Circumference15.8 in (40.1 cm)
Folded Volume507.0 cu. in. (8.3 liters)
Leg MaterialAluminum
Leg Sections3
Primary Leg Angle26 deg
Leg LocksTwist
Top Tube Diameter28.0 mm
Second Tube Diameter24.0 mm
Third Tube Diameter20.0 mm
Exchangeable FeetYes
Foot TypeRubber Platform
Bottom HookYes

The stiffness and damping data are the averages of 10 trials for each measurement.  The reported error is the standard error, except in the case of the damping data.  I have set the error in the damping at 10% as the standard error metric does not appropriately capture the error in fitting to the data.  All of the reported specifications are measured, with the exception of the weight rating.


Example data for oscillations about the vertical axis of the tripod:

The accelerometer is glitching a bit.  Does not affect the fit.  The damping is actually really good for an aluminum tripod.  Stiffness, not so much.

Some garbage, but overall a very nice clean Fourier spectrum


Example data for oscillations about the radial axis of the tripod:

Okay, clearly we are having some trouble fitting with this tripod.  The frequency appears to change right as the vibrations die out.  The oscillation frequency with large oscillations is well defined though, and that is what we are fitting to and reporting for the stiffness.  The damping is clearly exceptional but the stiffness not so much.  The huge amount of damping makes that irrelevant in practice.  All of the oscillations are quickly coupled into the axial rotation.

The difficulty is clearly reflected in the frequency space data.  We are getting the right line, its just not as clean as we are used to.