Sony Alpha to Pentax K Adapter?

Capture Lights · 10-31-2014, 10:53 AM

So i've recently brought an awesome alpha lens, thinking that it may be able to adapt to Pentax.

But after much search, i can only find MD-PK and not MA-PK. Anybody have an work around?

Thanks,

carpents · 10-31-2014, 11:04 AM

The registration distance is shorter for Sony/Minolta Alpha lenses than for Pentax, so they are not adaptable to one another. The only adapter you can get will either have an optic to re-focus the lens (which degrades quality significantly because these aren't OEM adapters) or will turn your lenses into macro-only ones.

Capture Lights · 10-31-2014, 11:20 AM

Originally posted by carpents

The registration distance is shorter for Sony/Minolta Alpha lenses than for Pentax, so they are not adaptable to one another. The only adapter you can get will either have an optic to re-focus the lens (which degrades quality significantly because these aren't OEM adapters) or will turn your lenses into macro-only ones.

its quiet hard to find one actually...
i cant even find one that has the glass in-between.

But there is the MC/MD to Pentax.

Does the Sony Alpha/MA mount into the MC/MD end of this adapter mentioned above?

carpents · 10-31-2014, 11:27 AM

Originally posted by Capture Lights

its quiet hard to find one actually...
i cant even find one that has the glass in-between.

But there is the MC/MD to Pentax.

Does the Sony Alpha/MA mount into the MC/MD end of this adapter mentioned above?

No, Minolta completely changed the mount between the MC/MD and the Alpha.

There probably aren't many around because they're of limited utility. Edit to add: The Alpha also uses electronic contact for controlling the aperture. (Like Canon EOS.) So this is likely the stopping point for an adapter this way, in addition to the registration stuff.

stevebrot · 10-31-2014, 11:37 AM - **1 Like**

Originally posted by Capture Lights

But there is the MC/MD to Pentax.

MC/MD also has a shorter registration distance.

Originally posted by carpents

No, Minolta completely changed the mount between the MC/MD and the Alpha.

Good to see that you are posting here again, carpents.

Steve

Capture Lights · 10-31-2014, 11:38 AM

Originally posted by carpents

No, Minolta completely changed the mount between the MC/MD and the Alpha.

There probably aren't many around because they're of limited utility. Edit to add: The Alpha also uses electronic contact for controlling the aperture. (Like Canon EOS.) So this is likely the stopping point for an adapter this way, in addition to the registration stuff.

darn it, the lens i purchased was an manual focus cine lens, so i wasn't worrying about the contacts.

but judging from the situation, i might have to resell it, and purchase another one..

Edit, thanks for the helps!

carpents · 10-31-2014, 01:46 PM - **1 Like**

Originally posted by stevebrot

Good to see that you are posting here again, carpents.

Steve

Turned into a lurker! Thanks Steve.

madhurvyas · 11-01-2014, 12:51 AM

There should be something like adaptall lenses for these new lenses, I think MFT people are doing good job of keeping lenses interchangeable.

10-31-2014, 10:53 AM	#1
Capture Lights Senior Member Join Date: Mar 2014 Posts: 113	Sony Alpha to Pentax K Adapter? So i've recently brought an awesome alpha lens, thinking that it may be able to adapt to Pentax. But after much search, i can only find MD-PK and not MA-PK. Anybody have an work around? Thanks,

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10-31-2014, 11:04 AM	#2
carpents Veteran Member Join Date: Sep 2006 Location: West Chester, PA Photos: Gallery \| Albums Posts: 1,420	The registration distance is shorter for Sony/Minolta Alpha lenses than for Pentax, so they are not adaptable to one another. The only adapter you can get will either have an optic to re-focus the lens (which degrades quality significantly because these aren't OEM adapters) or will turn your lenses into macro-only ones.

10-31-2014, 11:20 AM	#3
Capture Lights Senior Member Join Date: Mar 2014 Posts: 113 Original Poster	Originally posted by carpents The registration distance is shorter for Sony/Minolta Alpha lenses than for Pentax, so they are not adaptable to one another. The only adapter you can get will either have an optic to re-focus the lens (which degrades quality significantly because these aren't OEM adapters) or will turn your lenses into macro-only ones. its quiet hard to find one actually... i cant even find one that has the glass in-between. But there is the MC/MD to Pentax. Does the Sony Alpha/MA mount into the MC/MD end of this adapter mentioned above?

10-31-2014, 11:27 AM	#4
carpents Veteran Member Join Date: Sep 2006 Location: West Chester, PA Photos: Gallery \| Albums Posts: 1,420	Originally posted by Capture Lights its quiet hard to find one actually... i cant even find one that has the glass in-between. But there is the MC/MD to Pentax. Does the Sony Alpha/MA mount into the MC/MD end of this adapter mentioned above? No, Minolta completely changed the mount between the MC/MD and the Alpha. There probably aren't many around because they're of limited utility. Edit to add: The Alpha also uses electronic contact for controlling the aperture. (Like Canon EOS.) So this is likely the stopping point for an adapter this way, in addition to the registration stuff.

10-31-2014, 11:37 AM - 1 Like	#5
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by Capture Lights But there is the MC/MD to Pentax. MC/MD also has a shorter registration distance. Originally posted by carpents No, Minolta completely changed the mount between the MC/MD and the Alpha. Good to see that you are posting here again, carpents. Steve

10-31-2014, 11:38 AM	#6
Capture Lights Senior Member Join Date: Mar 2014 Posts: 113 Original Poster	Originally posted by carpents No, Minolta completely changed the mount between the MC/MD and the Alpha. There probably aren't many around because they're of limited utility. Edit to add: The Alpha also uses electronic contact for controlling the aperture. (Like Canon EOS.) So this is likely the stopping point for an adapter this way, in addition to the registration stuff. darn it, the lens i purchased was an manual focus cine lens, so i wasn't worrying about the contacts. but judging from the situation, i might have to resell it, and purchase another one.. Edit, thanks for the helps!

10-31-2014, 01:46 PM - 1 Like	#7
carpents Veteran Member Join Date: Sep 2006 Location: West Chester, PA Photos: Gallery \| Albums Posts: 1,420	Originally posted by stevebrot Good to see that you are posting here again, carpents. Steve Turned into a lurker! Thanks Steve.

11-01-2014, 12:51 AM	#8
madhurvyas Veteran Member Join Date: Jan 2008 Location: Bikaner (Raj)-India Photos: Gallery Posts: 562	There should be something like adaptall lenses for these new lenses, I think MFT people are doing good job of keeping lenses interchangeable.