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A 1.7 with a teleplus 2x

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reso
Posted 10/05/2011 - 14:13 Link
i have just taken some photos with this set up wide open and the data on photo me show,s f 1.7 no allowance for the teleplus is this reading correct? or is the teleplus faulty
k5iis sigma 10-20 hsm tamron 17-50 pentax da 18-135 pentax A 50 f 1;1 7
pentax da*60-250 pentax da 55-300 sigma apo 150-500 hsm os pentax af1.7 adapter
Pentax af aw 1.4 rear converter and a flash
Edited by reso: 10/05/2011 - 14:29
Mike-P
Posted 10/05/2011 - 14:33 Link
The only teleconverter which will report the correct aperture is the Pentax AF 1.7x and then with only certain Pentax lenses.
My Flickr
johnwhit
Posted 10/05/2011 - 15:01 Link
As above, you have to do the math.

John
PPG link

In LBA hiatus.

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