DFA 150-450mm converter with K-1 Il

gerardbaron · 04-15-2019, 02:45 PM

Is anybody use a converter with the DFA 150-450mm
I understand Pentax 1.4 isn’t working.
Is the Sigma or other works on full frame?
Any rumor from Pentax?
Thanks to all

BugsDogsAndSunsets · 04-15-2019, 03:08 PM

There's actually an official guide:

Pentax K-Mount Teleconverter Guide - Articles and Tips | PentaxForums.com

Paul the Sunman · 04-15-2019, 03:09 PM - **2 Likes**

You may be interested in this review of how the DA 1.4x teleconverter works with the DFA 150-450. Being a crop-frame TC, it vignettes badly, but otherwise works well.

**gaweidert** · 04-15-2019, 04:10 PM

I have a Tamron 1.4x converter and it works fine with my D FA 150-450 lens. I also have a Sigma 1.4x teleconverter. It does not have the two contacts to drive lens autofocus system. It also will not lock in place so I would not trust my lens on it. The Sigma converters are basically good only for Sigma lenses although a few Pentax lenses will work on them.

The lack of Pentax FF teleconverters is my biggest frustration with Ricoh. I

**tduell** · 04-15-2019, 04:14 PM

Originally posted by gerardbaron

Is anybody use a converter with the DFA 150-450mm
I understand Pentax 1.4 isn’t working.

Not sure what 'isn't working' means.
I use the Pentax 1.4xTC with the DFA 150-450 on a K-1 quite a bit and it 'works' quite well.
As others have mentioned from time to time, it does vignette, but I reckon it is minor and of little consequence as most of my shots require some cropping.

Cheers,
Terry

**catfishjohn** · 04-15-2019, 04:38 PM

Read the review in the forum regarding the HD DA 1.4 with the DFA 150-450. It works very well except for the minor vignette. I am pleased with mine.

joergens.mi · 04-15-2019, 09:17 PM

The SMC Pentax-F 1.7x AF works fine

biz-engineer · 04-15-2019, 11:30 PM - **1 Like**

Originally posted by gerardbaron

Is anybody use a converter with the DFA 150-450mm

Yes. Loads of vignetting. I sold the HD TC, use crop mode. If you have the K1II and 150-450 it's always an very good equipment, try to get closer to subject (have you thought about using IR remote + LV or WiFi tethering will do well in some cases), just enjoy it.

Originally posted by gerardbaron

Any rumor from Pentax?

Yes, current the news is that the K1 system is the value / money. For rumors, it's a more tricky question, because every person who asked Ricoh about it had to sign an NDA and can't spill the bean on PF unless they want to end-up like Carlos Ghosn with wife and kids bringing him oranges behind the bars.

BugsDogsAndSunsets · 04-16-2019, 05:40 AM

One other thing to keep in mind - if you really need the extra reach, there's nothing wrong with grabbing your crop body with the 150-450.

04-15-2019, 02:45 PM	#1
gerardbaron Senior Member Join Date: Apr 2011 Location: Mississauga (Canada) Photos: Albums Posts: 137	DFA 150-450mm converter with K-1 Il Is anybody use a converter with the DFA 150-450mm I understand Pentax 1.4 isn’t working. Is the Sigma or other works on full frame? Any rumor from Pentax? Thanks to all

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04-15-2019, 03:08 PM	#2
BugsDogsAndSunsets Forum Member Join Date: Mar 2019 Location: Iowa, United States Posts: 92	There's actually an official guide: Pentax K-Mount Teleconverter Guide - Articles and Tips \| PentaxForums.com

04-15-2019, 03:09 PM - 2 Likes	#3
Paul the Sunman Pentaxian Join Date: Aug 2011 Location: Melbourne Photos: Gallery Posts: 4,384	You may be interested in this review of how the DA 1.4x teleconverter works with the DFA 150-450. Being a crop-frame TC, it vignettes badly, but otherwise works well.

04-15-2019, 04:10 PM	#4
gaweidert Loyal Site Supporter Join Date: Mar 2012 Location: Rochester, NY Photos: Gallery Posts: 5,156	I have a Tamron 1.4x converter and it works fine with my D FA 150-450 lens. I also have a Sigma 1.4x teleconverter. It does not have the two contacts to drive lens autofocus system. It also will not lock in place so I would not trust my lens on it. The Sigma converters are basically good only for Sigma lenses although a few Pentax lenses will work on them. The lack of Pentax FF teleconverters is my biggest frustration with Ricoh. I

04-15-2019, 04:14 PM	#5
tduell Loyal Site Supporter Join Date: May 2015 Location: Melbourne Posts: 1,369	Originally posted by gerardbaron Is anybody use a converter with the DFA 150-450mm I understand Pentax 1.4 isn’t working. Not sure what 'isn't working' means. I use the Pentax 1.4xTC with the DFA 150-450 on a K-1 quite a bit and it 'works' quite well. As others have mentioned from time to time, it does vignette, but I reckon it is minor and of little consequence as most of my shots require some cropping. Cheers, Terry

04-15-2019, 04:38 PM	#6
catfishjohn Site Supporter Join Date: Oct 2016 Location: Arkansas Posts: 133	Read the review in the forum regarding the HD DA 1.4 with the DFA 150-450. It works very well except for the minor vignette. I am pleased with mine.

04-15-2019, 09:17 PM	#7
joergens.mi Veteran Member Join Date: Jan 2012 Posts: 402	The SMC Pentax-F 1.7x AF works fine

04-15-2019, 11:30 PM - 1 Like	#8
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 11,135	Originally posted by gerardbaron Is anybody use a converter with the DFA 150-450mm Yes. Loads of vignetting. I sold the HD TC, use crop mode. If you have the K1II and 150-450 it's always an very good equipment, try to get closer to subject (have you thought about using IR remote + LV or WiFi tethering will do well in some cases), just enjoy it. Originally posted by gerardbaron Any rumor from Pentax? Yes, current the news is that the K1 system is the value / money. For rumors, it's a more tricky question, because every person who asked Ricoh about it had to sign an NDA and can't spill the bean on PF unless they want to end-up like Carlos Ghosn with wife and kids bringing him oranges behind the bars.

04-16-2019, 05:40 AM	#9
BugsDogsAndSunsets Forum Member Join Date: Mar 2019 Location: Iowa, United States Posts: 92	One other thing to keep in mind - if you really need the extra reach, there's nothing wrong with grabbing your crop body with the 150-450.

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