teleconverter for my k-5

Purusam · 01-07-2012, 05:22 PM

I want to buy a teleconverter for my k-5

is there still companys producing teleconverters like Kenko 1.5X Pz-AF Teleplus SHQ Teleconverter ?

i want it on my sigma 150-500 mm so the sigma teleconverter i cant use.

**manishved** · 01-07-2012, 07:45 PM

Yes, they do.

Purusam · 01-08-2012, 04:56 PM

What is the brand names ?

Docrwm · 01-08-2012, 05:54 PM

I see several brands on Amazon - Sigma, Pro-Optic, Bower, Vivitar - so Samyang is making some and Sigma appears to be as well. There are reviews here in the Lenses Section for many of the TCs out there for Pentax too.

**manishved** · 01-08-2012, 06:18 PM

Only the Tamron 1.4x PZ (not being made anymore) and the Kenko 1.5x will AF with SDM. Of course, the Pentax 1.7x AF will always AF as well.

Purusam · 01-10-2012, 05:07 PM

there seem to be alot of money to make in this teleconverter product, i wonder why pentax not start producing Pentax 1.7x AF again ?

maybe they hope to sell more lenses instead?

twitch · 01-10-2012, 05:09 PM

Design of Pentax 1.7 is dependant on using leaded glass, something that can no longer legally be sold new in most countries now. That's my understanding anyway.

**Ex Finn.** · 01-10-2012, 05:16 PM

Yup, RoHS.

**Lowell Goudge** · 01-10-2012, 05:21 PM

Originally posted by Purusam

I want to buy a teleconverter for my k-5

is there still companys producing teleconverters like Kenko 1.5X Pz-AF Teleplus SHQ Teleconverter ?

i want it on my sigma 150-500 mm so the sigma teleconverter i cant use.

if your sigma is a screw drive AF lens, and not an HSM lens then the sigma TC should work. To check is easy, just ,make sure the lens has a 35mm diameter opening at the rear element, and 12mm recessed (minimum) rear element, If the lens meets these two conditions, and the lens is screw dreive the sigma TC should work

Note however, that due to the maximum aperture of F6.3 at 500mm, NO TC will permit the AF to function correctly as this really needs to have a total maximum aperture in the range of 6.7-7 for AF to work reliably.

As a result, you will be relegated to MF.

arvi028 · 09-19-2012, 12:45 AM

Hi! I have the same problem to my Pentax K-5. I still waiting...but how longer...???

arvi028 · 09-19-2012, 12:47 AM

Hi! I have the same problem to my Pentax K-5. I still waiting...but how longer...???

01-07-2012, 05:22 PM	#1
Purusam Forum Member Join Date: Jan 2010 Photos: Gallery Posts: 82	teleconverter for my k-5 I want to buy a teleconverter for my k-5 is there still companys producing teleconverters like Kenko 1.5X Pz-AF Teleplus SHQ Teleconverter ? i want it on my sigma 150-500 mm so the sigma teleconverter i cant use.

09-19-2012, 12:47 AM	#11
arvi028 Forum Member Join Date: Aug 2012 Posts: 96	Telekonverter for Pentax K-5 Hi! I have the same problem to my Pentax K-5. I still waiting...but how longer...???

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01-07-2012, 07:45 PM	#2
manishved Loyal Site Supporter Join Date: Mar 2008 Location: N. Calif Photos: Gallery \| Albums Posts: 3,652	Yes, they do.

01-08-2012, 04:56 PM	#3
Purusam Forum Member Join Date: Jan 2010 Photos: Gallery Posts: 82 Original Poster	What is the brand names ?

01-08-2012, 05:54 PM	#4
Docrwm Veteran Member Join Date: Sep 2010 Location: Somewhere in the Southern US Photos: Gallery \| Albums Posts: 12,285	I see several brands on Amazon - Sigma, Pro-Optic, Bower, Vivitar - so Samyang is making some and Sigma appears to be as well. There are reviews here in the Lenses Section for many of the TCs out there for Pentax too.

01-08-2012, 06:18 PM	#5
manishved Loyal Site Supporter Join Date: Mar 2008 Location: N. Calif Photos: Gallery \| Albums Posts: 3,652	Only the Tamron 1.4x PZ (not being made anymore) and the Kenko 1.5x will AF with SDM. Of course, the Pentax 1.7x AF will always AF as well.

01-10-2012, 05:07 PM	#6
Purusam Forum Member Join Date: Jan 2010 Photos: Gallery Posts: 82 Original Poster	there seem to be alot of money to make in this teleconverter product, i wonder why pentax not start producing Pentax 1.7x AF again ? maybe they hope to sell more lenses instead?

01-10-2012, 05:09 PM	#7
twitch Veteran Member Join Date: Nov 2009 Posts: 4,571	Design of Pentax 1.7 is dependant on using leaded glass, something that can no longer legally be sold new in most countries now. That's my understanding anyway.

01-10-2012, 05:16 PM	#8
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	Yup, RoHS.

01-10-2012, 05:21 PM	#9
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,891	Originally posted by Purusam I want to buy a teleconverter for my k-5 is there still companys producing teleconverters like Kenko 1.5X Pz-AF Teleplus SHQ Teleconverter ? i want it on my sigma 150-500 mm so the sigma teleconverter i cant use. if your sigma is a screw drive AF lens, and not an HSM lens then the sigma TC should work. To check is easy, just ,make sure the lens has a 35mm diameter opening at the rear element, and 12mm recessed (minimum) rear element, If the lens meets these two conditions, and the lens is screw dreive the sigma TC should work Note however, that due to the maximum aperture of F6.3 at 500mm, NO TC will permit the AF to function correctly as this really needs to have a total maximum aperture in the range of 6.7-7 for AF to work reliably. As a result, you will be relegated to MF.

09-19-2012, 12:45 AM	#10
arvi028 Forum Member Join Date: Aug 2012 Posts: 96	Hi! I have the same problem to my Pentax K-5. I still waiting...but how longer...???