Pentax Lens Adapter Compatibility at DVinfo.net

Angelo Ucciferri · January 20th, 2012, 05:44 PM

Hello,

I have the following 2 lenses for my Pentax K10d. (This is a 3 year old 10mp DLSR.)

- Sigma 18-50mm f/2.8 EX DC SLD ELD
18-50mm F2.8 EX DC Macro - Standard Zoom Lenses - SigmaPhoto.com

Pentax 10-17mm Fisheye f/3.5-4.5
- http://www.bhphotovideo.com/c/product/418135-USA/Pentax_21580_SMCP_DA_10_17mm_f_3_5_4_5_ED.html
I cannot figure out what lens mount adapter I would need to mount these lenses on my GH2. One website calls them a "DA" mount, another calls them a "Kaf" mount, another calls them a "J" mount.

I am looking at the $25 adapter mounts on eBay - which come in a variety of mounts. Does any other Pentaxians out there know what mount adapter would work?

Thanks,
Angelo

Kin Lau · January 25th, 2012, 07:30 AM

None of the Pentax K-mount adapters that I've seen offer electronic control, so the only part you need to care about, is that it's a K-mount adapter for M43.

Angelo Ucciferri · January 26th, 2012, 02:40 AM

Thanks Kin,

I actually asked this same question to an eBay vendor and got this response:

"It is for Pentax DA, KAF lens, but it also fits Pentax A, K, M, F"

That seems to pretty much cover them all, so I guess they all have similar mounts. I bought the adapter for $25, so it wasn't a major purchase like some of the adapters out there.

I'll post some results, really looking forward to trying out my Pentax Fisheye and fast zoom (18-50 2.8).

Thanks,
Angelo

Bill Koehler · January 28th, 2012, 12:30 AM

A "FA" lens is Pentax speak for a lens having a full frame (36mm x 24mm) image circle.
A "DA" lens is Pentax speak for a lens having a APS-C image circle.
A "J" lens is Pentax speak for some older cheap lenses that didn't have an aperture ring.

An "M" lens means the lens supports only Manual operation.
An "A" lens means the lens supports Aperture being controlled from the camera.
You need these to support automated exposure modes / aperture priority modes on the camera.

There are several varieties of Pentax K-mount (K, KA, KAF2, KAF3).
As far as I know, Pentax has taken care to make sure they are backward compatible so a 30 year old lens will work on a brand new Pentax camera. And a brand new lens will work on a 30 year old body. There are of course features that require both the lens & body to support that feature.

For furthur information I would suggest reading here:

Pentax K mount - Wikipedia, the free encyclopedia

January 20th, 2012, 05:44 PM	#1
Angelo Ucciferri Regular Crew Join Date: Jul 2011 Location: Central NJ Posts: 106	Pentax Lens Adapter Compatibility Hello, I have the following 2 lenses for my Pentax K10d. (This is a 3 year old 10mp DLSR.) - Sigma 18-50mm f/2.8 EX DC SLD ELD 18-50mm F2.8 EX DC Macro - Standard Zoom Lenses - SigmaPhoto.com Pentax 10-17mm Fisheye f/3.5-4.5 - http://www.bhphotovideo.com/c/product/418135-USA/Pentax_21580_SMCP_DA_10_17mm_f_3_5_4_5_ED.html I cannot figure out what lens mount adapter I would need to mount these lenses on my GH2. One website calls them a "DA" mount, another calls them a "Kaf" mount, another calls them a "J" mount. I am looking at the $25 adapter mounts on eBay - which come in a variety of mounts. Does any other Pentaxians out there know what mount adapter would work? Thanks, Angelo __________________ Ironbird Studios - www.IronbirdStudios.com New Jersey / New York City - Music / Audio / Video Production

January 25th, 2012, 07:30 AM	#2
Kin Lau Major Player Join Date: Mar 2009 Location: Ottawa, ON Posts: 385	Re: Pentax Lens Adapter Compatibility None of the Pentax K-mount adapters that I've seen offer electronic control, so the only part you need to care about, is that it's a K-mount adapter for M43.

January 26th, 2012, 02:40 AM	#3
Angelo Ucciferri Regular Crew Join Date: Jul 2011 Location: Central NJ Posts: 106	Re: Pentax Lens Adapter Compatibility Thanks Kin, I actually asked this same question to an eBay vendor and got this response: "It is for Pentax DA, KAF lens, but it also fits Pentax A, K, M, F" That seems to pretty much cover them all, so I guess they all have similar mounts. I bought the adapter for $25, so it wasn't a major purchase like some of the adapters out there. I'll post some results, really looking forward to trying out my Pentax Fisheye and fast zoom (18-50 2.8). Thanks, Angelo __________________ Ironbird Studios - www.IronbirdStudios.com New Jersey / New York City - Music / Audio / Video Production

January 28th, 2012, 12:30 AM	#4
Bill Koehler Major Player Join Date: May 2007 Location: Alpharetta, Georgia, USA Posts: 760	Re: Pentax Lens Adapter Compatibility A "FA" lens is Pentax speak for a lens having a full frame (36mm x 24mm) image circle. A "DA" lens is Pentax speak for a lens having a APS-C image circle. A "J" lens is Pentax speak for some older cheap lenses that didn't have an aperture ring. An "M" lens means the lens supports only Manual operation. An "A" lens means the lens supports Aperture being controlled from the camera. You need these to support automated exposure modes / aperture priority modes on the camera. There are several varieties of Pentax K-mount (K, KA, KAF2, KAF3). As far as I know, Pentax has taken care to make sure they are backward compatible so a 30 year old lens will work on a brand new Pentax camera. And a brand new lens will work on a 30 year old body. There are of course features that require both the lens & body to support that feature. For furthur information I would suggest reading here: Pentax K mount - Wikipedia, the free encyclopedia