Do we still need a TC?

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

awaldram wrote:

Anastigmat wrote:

If your lens is f/5.6, a 2x teleconverter requires manual focusing, Unless you focus correctly, you won't get a sharp image.

Only if you own a Canon, a Pentax will Auto focus an f5.6 + 2x converter with ease.

An f5.6 lens + 2X TC makes a F11 lens, much beyond diffraction limit on the K3, so result will be bad.

An 1,4 TC on a excellent, fast lens (F2.8 or F4) can be useful. This is the only case

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