Sigma Teleconverter compatibility

ticats · 08-09-2011, 08:34 AM

Has anyone used the latest Sigma 1.4X Teleconverter EX APO DG and a Pentax FA*300 mm F4.0 lens on a Pentax K5? Is it compatible with regards to AF and AE?
Any info on this combination would be helpful.

**Lowell Goudge** · 08-09-2011, 08:47 AM

Originally posted by ticats

Has anyone used the latest Sigma 1.4X Teleconverter EX APO DG and a Pentax FA*300 mm F4.0 lens on a Pentax K5? Is it compatible with regards to AF and AE?
Any info on this combination would be helpful.

I posted a list at one time of the compatible lenses, as stated in the sigma leaflet that came with my sigma TC

if you do a search under my name as a poster, and sigma TC for key words you should find it.

the bottom line is that your lens needs to have a 35mm diameter 12mm deep opening to accept the TC without interference. I don not recall the FA300/4 lens being on the list, I think it was limited to the FA300/2.8.

check here

https://www.pentaxforums.com/forums/pentax-beginners-corner-q/50537-teleconve...tml#post484259

ticats · 08-09-2011, 09:26 AM

Thanks for your help

**Lowell Goudge** · 08-09-2011, 09:59 AM

i should also mention that it can be used on the tamron adaptall II 200-500F5.6 MF zoom lens (without interference in the lens, it remains MF obviously)

snostorm · 08-09-2011, 02:06 PM

Hi ticats,

I have the EX 1.4x APO (pre DG) TC and the FA* 300/4.5, and the TC both fits and functions correctly. I doubt that there's much difference in the DG model, as usually it's just a matter of lens coating on the back element to prevent flare from reflections off the sensor.

Scott

08-09-2011, 08:34 AM	#1
ticats New Member Join Date: Jul 2008 Location: Hamilton, ON Posts: 13	Sigma Teleconverter compatibility Has anyone used the latest Sigma 1.4X Teleconverter EX APO DG and a Pentax FA*300 mm F4.0 lens on a Pentax K5? Is it compatible with regards to AF and AE? Any info on this combination would be helpful.

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08-09-2011, 08:47 AM	#2
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,886	Originally posted by ticats Has anyone used the latest Sigma 1.4X Teleconverter EX APO DG and a Pentax FA*300 mm F4.0 lens on a Pentax K5? Is it compatible with regards to AF and AE? Any info on this combination would be helpful. I posted a list at one time of the compatible lenses, as stated in the sigma leaflet that came with my sigma TC if you do a search under my name as a poster, and sigma TC for key words you should find it. the bottom line is that your lens needs to have a 35mm diameter 12mm deep opening to accept the TC without interference. I don not recall the FA300/4 lens being on the list, I think it was limited to the FA300/2.8. check here https://www.pentaxforums.com/forums/pentax-beginners-corner-q/50537-teleconve...tml#post484259

08-09-2011, 09:26 AM	#3
ticats New Member Join Date: Jul 2008 Location: Hamilton, ON Posts: 13 Original Poster	Thanks for your help

08-09-2011, 09:59 AM	#4
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,886	i should also mention that it can be used on the tamron adaptall II 200-500F5.6 MF zoom lens (without interference in the lens, it remains MF obviously)

08-09-2011, 02:06 PM	#5
snostorm Veteran Member Join Date: Oct 2006 Location: Chicago suburb, IL, USA Posts: 1,535	Hi ticats, I have the EX 1.4x APO (pre DG) TC and the FA* 300/4.5, and the TC both fits and functions correctly. I doubt that there's much difference in the DG model, as usually it's just a matter of lens coating on the back element to prevent flare from reflections off the sensor. Scott

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