Panasonic 1.4x teleconverter with sigma lens?

[Ktsa5239]

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So I was cleaning my lenses and thought there’s a fair bit of room at the mount end of the sigma 100-400 DG DN lens. So I tried to pop the panasonic 1.4x teleconverter on it, and it fits with no problems! I’m so excited!!! Wonder if it would actually work without hurting IQ or AF. Will try it tomorrow !

[Boojay]

It works fine, I remember being quite annoyed with myself after buying the sigma 1.4 when I already had the Panasonic.  It's a while since I had either, and while I do remember AF was fine, can't remember whether it reported correctly to exif.

 

 

Edited July 22, 2021 by Boojay

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[Brian C in Az]

2 hours ago, Boojay said:

It works fine, I remember being quite annoyed with myself after buying the sigma 1.4 when I already had the Panasonic.  It's a while since I had either, and while I do remember AF was fine, can't remember whether it reported correctly to exif.

 

 

That begs the question 

Did you ever do a comparison of the two TCs?

Is one superior to the other optically?

[Boojay]

I didn't do any in depth testing, because I had already decided to sell my Pan 70-200 and 1.4.  But, from the few images I took there was no noticeable difference. 

 

[dkCambridgeshire]

Maybe they're all made by Kenko  ... 

[Brian C in Az]

7 hours ago, Boojay said:

I didn't do any in depth testing, because I had already decided to sell my Pan 70-200 and 1.4.  But, from the few images I took there was no noticeable difference. 

 

Which Pan 70-200 did you have? The Pro f4.0 or Pro f2.8

What did you replace it with?

Why did you sell it/them?

[Boojay]

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7 hours ago, Brian C in Az said:

Which Pan 70-200 did you have? The Pro f4.0 or Pro f2.8

What did you replace it with?

Why did you sell it/them?

I had the F4 version, when the Sigma 100-400 arrived,  (already having the 55-135TL), I decided that was sufficient for (my) telephoto needs on CL/SL2.  

For me, the bigger issue is AF system used in L mount and I reverted to a Canon body for wildlife,  for occasional use, adapting longer Canon glass using MC-21 on the SL2.