Do we still need a TC?

Started Nov 11, 2013 | Discussions thread
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Re: Do we still need a TC?
In reply to Anastigmat, Nov 11, 2013

Anastigmat wrote:

Exactly, the light is the problem. If you have a bright light with good contrast like that a f5.6 lens and a 2x teleconverter will still autofocus. Point the same combination at a hawk sitting in a tree outdoors even when there is sunlight, and the autofocus will still hunt back and forth. Hawks are not like lamps. They don't come with LED or tungsten bulbs. With a f5.6 lens, a 1.4x teleconverter will still allow autofocus in real world situations with real world subjects, but not a 2x.

I don't recognise anything your saying re Pentax cameras, Do you have any experience with Pentax AF 2x converters and decent lens ?

From a boat hence the camera shake

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