Need to convert minolta to pentax.

Hidekelleco · 03-08-2016, 07:23 AM

There is some professional store to convert lens to pentax k mount?
I'm watching a lens auto promura 28mm f2.8 but is Minolta mount and wanted to convert to pentax k. There is a professional service for that? There is a good adapter Minolta to pentax?
Thanks in advance.

Not a Number · 03-08-2016, 07:48 AM - **1 Like**

The Minolta SR (MD) mount has a shorter image registration than Pentax K mount. This means the mount on either the camera or the lens has to be shortened in order to focus to infinity. In other words the lens has to sit deeper into the camera.

There are adapters available but in order to have infinity focus these have an optical element in them. You can get "glassless" adapter but these are only suitable for macro or close up work.

There are some threads on DIY conversions but they probably require some machining.

Rokkor lens (SR mount) can be adapted for the Canon EOS mount. Jim Buchanan provides kits for these. Search also on "Digital Rokkor"

Camera Services

**csa** · 03-08-2016, 07:52 AM - **2 Likes**

Might get more response in General Photography or SLR Lens Discussion; as this forum is for "non camera" discussion.

Parallax · 03-08-2016, 09:00 AM

Originally posted by csa

Might get more response in General Photography or SLR Lens Discussion; as this forum is for "non camera" discussion.

Especially since the sticky at the top of General Talk says "Photography related threads do not belong in Gen Talk"

moving

**boriscleto** · 03-08-2016, 09:25 AM - **1 Like**

It's not worth the effort. Leave the Minolta manual focus lenses to the mirrorless crowd.

Unless you want to use the lens for macro. You can take the glass out of the adapter and use it as a short extension tube. The lens can be used reversed as well.

bassek · 03-08-2016, 09:46 AM - **1 Like**

You can buy the Pentax M28/2.8 with far less effort and cost.

Seb

Ontarian50 · 03-08-2016, 10:06 AM

Originally posted by bassek

You can buy the Pentax M28/2.8 with far less effort and cost.

Seb

I agree. And I'm pretty sure the Pentax M is of noticeably better quality than the aftermarket lens.

**boriscleto** · 03-08-2016, 10:38 AM - **1 Like**

Originally posted by Ontarian50

I agree. And I'm pretty sure the Pentax M is of noticeably better quality than the aftermarket lens.

I wouldn't think so. It's pretty hard to find a bad 28mm lens.

There is a review of the K-mount version in the database

Auto-Promura 28mm 2.8 C.P. Hi-Lux MC Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database

Not a Number · 03-08-2016, 11:30 AM - **1 Like**

Yes, not worth the time, effort and money to convert the lens when you can get a Pentax MF lens for maybe less than what it would cost you to have someone machine the parts for you.

They do make glassless adapters (I have two versions) if you want to use it as a macro lens. I use the adapter on my Minolta bellows and macro lenses.

03-08-2016, 07:23 AM	#1
Hidekelleco New Member Join Date: Dec 2015 Photos: Albums Posts: 5	Need to convert minolta to pentax. There is some professional store to convert lens to pentax k mount? I'm watching a lens auto promura 28mm f2.8 but is Minolta mount and wanted to convert to pentax k. There is a professional service for that? There is a good adapter Minolta to pentax? Thanks in advance.

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03-08-2016, 07:48 AM - 1 Like	#2
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	The Minolta SR (MD) mount has a shorter image registration than Pentax K mount. This means the mount on either the camera or the lens has to be shortened in order to focus to infinity. In other words the lens has to sit deeper into the camera. There are adapters available but in order to have infinity focus these have an optical element in them. You can get "glassless" adapter but these are only suitable for macro or close up work. There are some threads on DIY conversions but they probably require some machining. Rokkor lens (SR mount) can be adapted for the Canon EOS mount. Jim Buchanan provides kits for these. Search also on "Digital Rokkor" Camera Services

03-08-2016, 07:52 AM - 2 Likes	#3
csa Loyal Site Supporter Join Date: Aug 2014 Location: Montana mountains Posts: 10,133	Might get more response in General Photography or SLR Lens Discussion; as this forum is for "non camera" discussion.

03-08-2016, 09:00 AM	#4
Parallax Senior Moderator Loyal Site Supporter Join Date: Apr 2008 Location: South Dakota Photos: Gallery Posts: 19,332	Originally posted by csa Might get more response in General Photography or SLR Lens Discussion; as this forum is for "non camera" discussion. Especially since the sticky at the top of General Talk says "Photography related threads do not belong in Gen Talk"

03-08-2016, 09:25 AM - 1 Like	#5
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	It's not worth the effort. Leave the Minolta manual focus lenses to the mirrorless crowd. Unless you want to use the lens for macro. You can take the glass out of the adapter and use it as a short extension tube. The lens can be used reversed as well.

03-08-2016, 09:46 AM - 1 Like	#6
bassek Pentaxian Join Date: Feb 2011 Photos: Gallery Posts: 706	You can buy the Pentax M28/2.8 with far less effort and cost. Seb

03-08-2016, 10:06 AM	#7
Ontarian50 Veteran Member Join Date: Mar 2015 Posts: 530	Originally posted by bassek You can buy the Pentax M28/2.8 with far less effort and cost. Seb I agree. And I'm pretty sure the Pentax M is of noticeably better quality than the aftermarket lens.

03-08-2016, 10:38 AM - 1 Like	#8
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	Originally posted by Ontarian50 I agree. And I'm pretty sure the Pentax M is of noticeably better quality than the aftermarket lens. I wouldn't think so. It's pretty hard to find a bad 28mm lens. There is a review of the K-mount version in the database Auto-Promura 28mm 2.8 C.P. Hi-Lux MC Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database

03-08-2016, 11:30 AM - 1 Like	#9
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	Yes, not worth the time, effort and money to convert the lens when you can get a Pentax MF lens for maybe less than what it would cost you to have someone machine the parts for you. They do make glassless adapters (I have two versions) if you want to use it as a macro lens. I use the adapter on my Minolta bellows and macro lenses.