Forum: Pentax SLR Lens Discussion
10-23-2016, 11:02 AM
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Well said! I have a Sigma 150-500 and it does a fine job and is far superior to my 500mm mirror. Used ones are around and it will give you more reach than a 70-200 with a TC. I can also think of lot of good reasons to own the 60-250 or one of the 70-200's that are available but buying one for the main purpose of adding a TC and using it as an ultra long telephoto will probably end in disappointment. If you only need a long telephoto occasionally then the TC can be an acceptable solution but if you're going to be shooting long a lot, buy a long lens.
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