I'm not sure what you mean by limited used market, there's truckloads of used Pentax gear available. Going pro depends on what you mean. If you mean full frame, then there is no upgrade path at ...
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How to use manual focus – top 20 tips
Whether you have a manual focus-only lens or want to improve your manual focussing skills generally, we can help. Learn how to focus manually with these 20 essential tips from a wide-range of ...
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