Tokina A 28mm f/2.8 How to modify?

Runegutt123 · 11-16-2011, 11:14 AM

What do I have to do to make this fit my K5?
Its P/K A R/K A

Adam · 11-16-2011, 11:56 AM

If it's got the pentax mount which it sounds like to does, you should be kosher- it will work like a modern lens except that you'll have to focus manually.

If it has a "ricoh" pin in the back then don't use it; you can read more about this by searching numerous threads on the forum.

**kiwi_jono** · 11-16-2011, 12:44 PM

For what its worth - the "R" has the extra Rico pin. I have one and it was easy to remove (unscrew mount, remove pin, screw back together) - now works perfectly. I really like this lens because it has respectable sharpness and bokeh.

Search for "Rico Pin" here and you will find examples with photos.

causey · 11-16-2011, 02:57 PM

theatre of noise: Ricoh Lenses On Pentax Cameras -- The Ricoh Pin Fix

Runegutt123 · 11-17-2011, 04:12 AM

Thank ou all.
causey, thank you very much for the link.
Now i just ned a small Phillips, and this will Tokina may have a new life.

Thank you again.

Rune

kh1234567890 · 11-17-2011, 08:24 AM

Originally posted by Runegutt123

Now i just ned a small Phillips, and this will Tokina may have a new life.

It is unlikely to be a Phillips screw - more probably a JIS - Japanese Industrial Standard one. If it is tight then you are likely to mangle the screw head with a Phillips driver. It is often better to use a small flat blade driver. Or get the real thing.

Runegutt123 · 11-20-2011, 02:08 AM

Originally posted by kh1234567890

It is unlikely to be a Phillips screw - more probably a JIS - Japanese Industrial Standard one. If it is tight then you are likely to mangle the screw head with a Phillips driver. It is often better to use a small flat blade driver. Or get the real thing.

That I did not know. I have just ordered some JIS schrewdrivers. Thank you for letting me know. I Hope the lens is worth modifying.''

ultraviolet · 12-23-2011, 10:38 PM

Do you have the 49mm or 52mm filter thread version.
I have the 49mm ver. I had to remove the aperture lever protector as well to mount on my K-x. My Tokina 28mm f2.8 P/K-A.R ( no El, no RMC) 49mm filter thread has very wide protector (almost 1/4 circle) but very easy to remove.

Runegutt123 · 12-24-2011, 01:59 AM

I have the 49mm filter thread version. I have remivrd thr protector.
Works perfectly

11-16-2011, 11:14 AM	#1
Runegutt123 Senior Member Join Date: Apr 2011 Location: LODINGEN, Northern Norway Photos: Gallery \| Albums Posts: 275	Tokina A 28mm f/2.8 How to modify? What do I have to do to make this fit my K5? Its P/K A R/K A

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11-16-2011, 11:56 AM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,609	If it's got the pentax mount which it sounds like to does, you should be kosher- it will work like a modern lens except that you'll have to focus manually. If it has a "ricoh" pin in the back then don't use it; you can read more about this by searching numerous threads on the forum.

11-16-2011, 12:44 PM	#3
kiwi_jono Loyal Site Supporter Join Date: Dec 2009 Location: Christchurch, New Zealand Photos: Gallery \| Albums Posts: 2,437	For what its worth - the "R" has the extra Rico pin. I have one and it was easy to remove (unscrew mount, remove pin, screw back together) - now works perfectly. I really like this lens because it has respectable sharpness and bokeh. Search for "Rico Pin" here and you will find examples with photos.

11-16-2011, 02:57 PM	#4
causey Veteran Member Join Date: Feb 2009 Location: Arlington, VA Photos: Albums Posts: 3,757	theatre of noise: Ricoh Lenses On Pentax Cameras -- The Ricoh Pin Fix

11-17-2011, 04:12 AM	#5
Runegutt123 Senior Member Join Date: Apr 2011 Location: LODINGEN, Northern Norway Photos: Gallery \| Albums Posts: 275 Original Poster	Thank ou all. causey, thank you very much for the link. Now i just ned a small Phillips, and this will Tokina may have a new life. Thank you again. Rune

11-17-2011, 08:24 AM	#6
kh1234567890 Veteran Member Join Date: Sep 2010 Location: Manchester, UK Photos: Gallery Posts: 2,653	Originally posted by Runegutt123 Now i just ned a small Phillips, and this will Tokina may have a new life. It is unlikely to be a Phillips screw - more probably a JIS - Japanese Industrial Standard one. If it is tight then you are likely to mangle the screw head with a Phillips driver. It is often better to use a small flat blade driver. Or get the real thing.

11-20-2011, 02:08 AM	#7
Runegutt123 Senior Member Join Date: Apr 2011 Location: LODINGEN, Northern Norway Photos: Gallery \| Albums Posts: 275 Original Poster	Originally posted by kh1234567890 It is unlikely to be a Phillips screw - more probably a JIS - Japanese Industrial Standard one. If it is tight then you are likely to mangle the screw head with a Phillips driver. It is often better to use a small flat blade driver. Or get the real thing. That I did not know. I have just ordered some JIS schrewdrivers. Thank you for letting me know. I Hope the lens is worth modifying.''

12-23-2011, 10:38 PM	#8
ultraviolet Pentaxian Join Date: May 2010 Photos: Albums Posts: 687	Do you have the 49mm or 52mm filter thread version. I have the 49mm ver. I had to remove the aperture lever protector as well to mount on my K-x. My Tokina 28mm f2.8 P/K-A.R ( no El, no RMC) 49mm filter thread has very wide protector (almost 1/4 circle) but very easy to remove.

12-24-2011, 01:59 AM	#9
Runegutt123 Senior Member Join Date: Apr 2011 Location: LODINGEN, Northern Norway Photos: Gallery \| Albums Posts: 275 Original Poster	I have the 49mm filter thread version. I have remivrd thr protector. Works perfectly