If this isn't Pentax, then what mount is this?

minahasa · 06-30-2011, 11:35 AM

I bought a supposedly fine lens in a wrong mount!

Is it MD?

**boriscleto** · 06-30-2011, 11:50 AM

Looks like MD to me

RioRico · 06-30-2011, 11:53 AM

That's C/Y, Contax-Yashica, easily modified for PK. All that 's needed is a Dremel and metal-cutting blade. I've done a couple.

EAIT: On MC/MD, the notch is on the other edge of the bayonet flag.

minahasa · 06-30-2011, 11:58 AM

Originally posted by boriscleto

Looks like MD to me

..that's what I think..in the beginning..

Originally posted by RioRico

That's C/Y, Contax-Yashica, easily modified for PK. All that 's needed is a Dremel and metal-cutting blade. I've done a couple.

EAIT: On MC/MD, the notch is on the other edge of the bayonet flag.

..and then I see that the notch is in the different position, like you said. Is there a pic guide somewhere on this conversion?

**boriscleto** · 06-30-2011, 11:59 AM

Originally posted by RioRico

That's C/Y, Contax-Yashica, easily modified for PK. All that 's needed is a Dremel and metal-cutting blade. I've done a couple.

EAIT: On MC/MD, the notch is on the other edge of the bayonet flag.

Leitax also sells a replacement mount.

minahasa · 06-30-2011, 12:28 PM

RioRico, I've found your guide! It's not with pics, but seems understandable and followable. So the converted lens will act like presets?

m8o · 06-30-2011, 02:05 PM

Originally posted by minahasa

RioRico, I've found your guide! It's not with pics, but seems understandable and followable. So the converted lens will act like presets?

... this has piqued my curiosity as to what's written on the front bevel?
(that's my obtuse way of saying what focal length and max aperture is it?

)

RioRico · 06-30-2011, 02:43 PM

Originally posted by minahasa

RioRico, I've found your guide! It's not with pics, but seems understandable and followable. So the converted lens will act like presets?

Yes. Or, more accurately, like a strictly manual-aperture lens. To some people, 'preset' means a 2-ring preset. With my simple C/Y, OM, and NI mods, the lens spring-loading keeps the iris stopped down to the aperture-ring setting. Just like the old days before M/A switches!

I am reluctant to chop-up lenses that cost a lot. The lenses I have modified are good but cost me little. They include:

C/Y:
Yashica ML 50/1.4: US$10
Yashica DSB 50/1.9: US$7

OM:
Olympus OM S 50/1.8: US$18
Olympus OM T 135/3.5: US$25

NI:
Vivitar-Komine 28/2 CFWA: US$18
Nikkor 85/2 (my first mod!): US$9

OM's may require jamming the aperture mechanism to keep the iris stopped down. I'm working on a Petri bayonet mount that need some trick for the iris spring -- I haven't mastered that yet. Exakta mounts are easy; just grind the adapter, not the lens! Minolta MD mounts probably require replacing the lens base -- I haven't done that yet either. But this is almost a cottage industry!

minahasa · 06-30-2011, 03:17 PM

Originally posted by m8o

... this has piqued my curiosity as to what's written on the front bevel?
(that's my obtuse way of saying what focal length and max aperture is it?

)

Aha.. this lens is just a few quids, un-heard-much brand 28mm F2.8 lens that i came across on the fleabay

The seller sell it saying it is for Pentax, it is Pentax all right..written on the rear lens cap!

Originally posted by RioRico

Yes. Or, more accurately, like a strictly manual-aperture lens. To some people, 'preset' means a 2-ring preset. With my simple C/Y, OM, and NI mods, the lens spring-loading keeps the iris stopped down to the aperture-ring setting. Just like the old days before M/A switches!

I am reluctant to chop-up lenses that cost a lot. The lenses I have modified are good but cost me little. They include:

C/Y:
Yashica ML 50/1.4: US$10
Yashica DSB 50/1.9: US$7

OM:
Olympus OM S 50/1.8: US$18
Olympus OM T 135/3.5: US$25

NI:
Vivitar-Komine 28/2 CFWA: US$18
Nikkor 85/2 (my first mod!): US$9

OM's may require jamming the aperture mechanism to keep the iris stopped down. I'm working on a Petri bayonet mount that need some trick for the iris spring -- I haven't mastered that yet. Exakta mounts are easy; just grind the adapter, not the lens! Minolta MD mounts probably require replacing the lens base -- I haven't done that yet either. But this is almost a cottage industry!

Geez, you truly are adventurous!

slip · 06-30-2011, 04:29 PM

Originally posted by boriscleto

Looks like MD to me

sorry but what is an MD?

thanks

minahasa · 06-30-2011, 04:43 PM

Err.. Minolta mount?

RioRico · 06-30-2011, 05:44 PM

Minolta had two types of bayonet mounts. The first, manual focus only, was introduced with their SRT cameras and MC series of lenses, and carried over to the MD lens series. It may be called MC or MD or M/MD or MC/MD or something like that. That's what was suggested here -- close, but not close enough.

The other Minolta mount was the autofocus A mount introduced with their Maxxum line of cameras. Less than a decade ago, Sony bought Minolta's camera operations and adopted that as their Alpha mount. Minolta lives! MC/MD doesn't. Bother.

FWIW, I have a beautiful (and heavy!) Minolta MC Tele Rokkor-PF 100/2.5 lens that I hope to convert to Pentax mount. All I need is courage...

Ingramml · 09-05-2013, 09:32 AM

Can anyone help me identify this mount. I found a 28mm that I would like but want to know what I am getting into

**Just1MoreDave** · 09-05-2013, 09:41 AM

That Y/C has to mean Yashica/Contax. The lens on the left looks like M42 with an adapter attached - my guess is a Vivitar/Tokina 28/2.8. On the right is Canon FD or similar.

Ingramml · 09-05-2013, 10:35 AM

Your right the one of the right is a Tokina 28/2.8 there is no adapter on it. is Is it a Cannon mount. I have a Nex and I am looking for an adapter.

06-30-2011, 11:35 AM	#1
minahasa Veteran Member Join Date: Jan 2011 Location: Minahasa, North Celebes (Sulawesi) Photos: Albums Posts: 586	If this isn't Pentax, then what mount is this? I bought a supposedly fine lens in a wrong mount! Is it MD?

09-05-2013, 09:32 AM	#13
Ingramml New Member Join Date: Aug 2013 Posts: 12	Can anyone help me identify this mount. I found a 28mm that I would like but want to know what I am getting into Attached Images

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06-30-2011, 11:50 AM	#2
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,477	Looks like MD to me

06-30-2011, 11:53 AM	#3
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	That's C/Y, Contax-Yashica, easily modified for PK. All that 's needed is a Dremel and metal-cutting blade. I've done a couple. EAIT: On MC/MD, the notch is on the other edge of the bayonet flag.

06-30-2011, 11:58 AM	#4
minahasa Veteran Member Join Date: Jan 2011 Location: Minahasa, North Celebes (Sulawesi) Photos: Albums Posts: 586 Original Poster	Originally posted by boriscleto Looks like MD to me ..that's what I think..in the beginning.. Originally posted by RioRico That's C/Y, Contax-Yashica, easily modified for PK. All that 's needed is a Dremel and metal-cutting blade. I've done a couple. EAIT: On MC/MD, the notch is on the other edge of the bayonet flag. ..and then I see that the notch is in the different position, like you said. Is there a pic guide somewhere on this conversion?

06-30-2011, 11:59 AM	#5
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,477	Originally posted by RioRico That's C/Y, Contax-Yashica, easily modified for PK. All that 's needed is a Dremel and metal-cutting blade. I've done a couple. EAIT: On MC/MD, the notch is on the other edge of the bayonet flag. Leitax also sells a replacement mount.

06-30-2011, 12:28 PM	#6
minahasa Veteran Member Join Date: Jan 2011 Location: Minahasa, North Celebes (Sulawesi) Photos: Albums Posts: 586 Original Poster	RioRico, I've found your guide! It's not with pics, but seems understandable and followable. So the converted lens will act like presets?

06-30-2011, 02:05 PM	#7
m8o Veteran Member Join Date: Jul 2007 Location: 40°-55'-44" N / 73°-24'-07" W [on LI] Photos: Gallery \| Albums Posts: 3,092	Originally posted by minahasa RioRico, I've found your guide! It's not with pics, but seems understandable and followable. So the converted lens will act like presets? ... this has piqued my curiosity as to what's written on the front bevel? (that's my obtuse way of saying what focal length and max aperture is it? )

06-30-2011, 02:43 PM	#8
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	Originally posted by minahasa RioRico, I've found your guide! It's not with pics, but seems understandable and followable. So the converted lens will act like presets? Yes. Or, more accurately, like a strictly manual-aperture lens. To some people, 'preset' means a 2-ring preset. With my simple C/Y, OM, and NI mods, the lens spring-loading keeps the iris stopped down to the aperture-ring setting. Just like the old days before M/A switches! I am reluctant to chop-up lenses that cost a lot. The lenses I have modified are good but cost me little. They include: C/Y: Yashica ML 50/1.4: US$10 Yashica DSB 50/1.9: US$7 OM: Olympus OM S 50/1.8: US$18 Olympus OM T 135/3.5: US$25 NI: Vivitar-Komine 28/2 CFWA: US$18 Nikkor 85/2 (my first mod!): US$9 OM's may require jamming the aperture mechanism to keep the iris stopped down. I'm working on a Petri bayonet mount that need some trick for the iris spring -- I haven't mastered that yet. Exakta mounts are easy; just grind the adapter, not the lens! Minolta MD mounts probably require replacing the lens base -- I haven't done that yet either. But this is almost a cottage industry!

06-30-2011, 03:17 PM	#9
minahasa Veteran Member Join Date: Jan 2011 Location: Minahasa, North Celebes (Sulawesi) Photos: Albums Posts: 586 Original Poster	Originally posted by m8o ... this has piqued my curiosity as to what's written on the front bevel? (that's my obtuse way of saying what focal length and max aperture is it? ) Aha.. this lens is just a few quids, un-heard-much brand 28mm F2.8 lens that i came across on the fleabay The seller sell it saying it is for Pentax, it is Pentax all right..written on the rear lens cap! Originally posted by RioRico Yes. Or, more accurately, like a strictly manual-aperture lens. To some people, 'preset' means a 2-ring preset. With my simple C/Y, OM, and NI mods, the lens spring-loading keeps the iris stopped down to the aperture-ring setting. Just like the old days before M/A switches! I am reluctant to chop-up lenses that cost a lot. The lenses I have modified are good but cost me little. They include: C/Y: Yashica ML 50/1.4: US$10 Yashica DSB 50/1.9: US$7 OM: Olympus OM S 50/1.8: US$18 Olympus OM T 135/3.5: US$25 NI: Vivitar-Komine 28/2 CFWA: US$18 Nikkor 85/2 (my first mod!): US$9 OM's may require jamming the aperture mechanism to keep the iris stopped down. I'm working on a Petri bayonet mount that need some trick for the iris spring -- I haven't mastered that yet. Exakta mounts are easy; just grind the adapter, not the lens! Minolta MD mounts probably require replacing the lens base -- I haven't done that yet either. But this is almost a cottage industry! Geez, you truly are adventurous!

06-30-2011, 04:29 PM	#10
slip Veteran Member Join Date: Oct 2006 Location: 2 hours north of toronto ontario canada Photos: Gallery \| Albums Posts: 3,535	Originally posted by boriscleto Looks like MD to me sorry but what is an MD? thanks

06-30-2011, 04:43 PM	#11
minahasa Veteran Member Join Date: Jan 2011 Location: Minahasa, North Celebes (Sulawesi) Photos: Albums Posts: 586 Original Poster	Err.. Minolta mount?

06-30-2011, 05:44 PM	#12
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	Minolta had two types of bayonet mounts. The first, manual focus only, was introduced with their SRT cameras and MC series of lenses, and carried over to the MD lens series. It may be called MC or MD or M/MD or MC/MD or something like that. That's what was suggested here -- close, but not close enough. The other Minolta mount was the autofocus A mount introduced with their Maxxum line of cameras. Less than a decade ago, Sony bought Minolta's camera operations and adopted that as their Alpha mount. Minolta lives! MC/MD doesn't. Bother. FWIW, I have a beautiful (and heavy!) Minolta MC Tele Rokkor-PF 100/2.5 lens that I hope to convert to Pentax mount. All I need is courage...

09-05-2013, 09:41 AM	#14
Just1MoreDave Site Supporter Join Date: Feb 2007 Location: Aurora, CO Photos: Gallery \| Albums Posts: 6,340	That Y/C has to mean Yashica/Contax. The lens on the left looks like M42 with an adapter attached - my guess is a Vivitar/Tokina 28/2.8. On the right is Canon FD or similar.

09-05-2013, 10:35 AM	#15
Ingramml New Member Join Date: Aug 2013 Posts: 12	Your right the one of the right is a Tokina 28/2.8 there is no adapter on it. is Is it a Cannon mount. I have a Nex and I am looking for an adapter.