Quote:
Originally Posted by Bassnut
A steel pier is far more expensive, can be removed, and has a lower thermal mass to reduce thermal currents at high FLs, but youd have to be fairly anal to see the diff IMO.
A PVC tube inserted in a concrete pier before poring concrete solves the cable problem easily.
A concrete pier is a far cheaper, subbie-free, same-result solution IMO.
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Thanks for the input Fred. I couldnt come up with any of my own reasons why one was better or worse than the other and all suggestions so far do not alter this logic. Seems that its really going to come down to which is going to be easiest depending on ones resources, both practically and financially. This is good and a welcome change from many of the other considerations in astro photography where there are many differing opinions.