Orchid seed capsule (not pod) maturation time is related to genetics, growing conditions, and overall health of the plant. There is no strict timetable for them, just guidelines.
As Jayme stated, the more mature the better, and I find that keeping a close eye on them and looking for the first signs of yellowing at either end is a good guideline as to when to harvest them.
A plant has a great deal "invested" in a seed capsule, so will be far less frivolous about "blasting" them than it will be with flower buds. As Jayme also said, minimizing the exposure of the plant to temperature extremes is the key. A mad dash from a warm building to a warm car with the plant properly protected will be fine.
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