Which would you buy?
The Sigma 100-300/4 has fairly good reviews, although it tends to have qc issues so getting a good copy is important. Costs about SGD 1.7k new. No weathersealing, supersonic focussing.
The Pentax 60-250/4 is quite new, but probably as good or better across the range. Costs probably SGD 1.9k new. Has weathersealing, supersonic focussing, but loses some range.
The Sigma 100-300/4 has fairly good reviews, although it tends to have qc issues so getting a good copy is important. Costs about SGD 1.7k new. No weathersealing, supersonic focussing.
The Pentax 60-250/4 is quite new, but probably as good or better across the range. Costs probably SGD 1.9k new. Has weathersealing, supersonic focussing, but loses some range.
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