Adapter for lens on k-50

ahall1276 · 08-16-2015, 05:39 PM

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I have a k-50 and bought some older lenses. I have VIVITAR 28MM 1:2.8 WIDE ANGLE LENS 49MM, Super Takumar 3.5 135mm Lens, Pentax Super-Takumar f/2 55mm Screw Mount. I need an adapter to use these on my k-50, can I get some suggestions to help me find one. Thanks everyone.

Aaron28 · 08-16-2015, 05:50 PM

if they are m42 thread this may work
M42 Lens to Pentax PK K Mount Adapter Ring Focus Infinity M42 PK | eBay

**patrick9** · 08-16-2015, 06:07 PM

I would recommend using a Pentax brand adapter. I have a friend that had trouble with the aftermarket one ,but no trouble with his Pentax brand one. I have read of others reporting the same. He loves his Super tac's. Is the Vivitar a K mount?

**jatrax** · 08-16-2015, 06:15 PM

If you can find one, get the Pentax brand adapter rather than a knock-off. The cheap ones usually work but quality control is erratic and some can end up stuck on your camera and you cannot get the lens off without a lot of work. The Pentax one usually goes for about $30 and works perfectly.

**pepperberry farm** · 08-16-2015, 07:08 PM

best information out there for mounting and using M42 lenses:

https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html

**ramseybuckeye** · 08-16-2015, 07:38 PM

There are used and new adapters on ebay (search for genuine Pentax adapter) at various prices. Once in a while you may see one on a k-mount film camera with a screw mount lens attached. You can also find them new at B & H and Adorama right now at about $45 each.

**UncleVanya** · 08-16-2015, 08:19 PM

I have the Pentax and a Kalt. They both work but my Kalt requires a tool to remove (came with it). My Kalt was a NOS item.

Another approach some people use is to dedicate a cheapo adapter to each lens - they remove the spring clip first and then get it tight (not sure how) and they treat it like a Kmount from then on.

**pepperberry farm** · 08-17-2015, 02:54 AM

or dedicate a second camera body to the use of M42 lenses...

08-16-2015, 05:39 PM	#1
ahall1276 New Member Join Date: Aug 2015 Posts: 4	Adapter for lens on k-50 Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here. I have a k-50 and bought some older lenses. I have VIVITAR 28MM 1:2.8 WIDE ANGLE LENS 49MM, Super Takumar 3.5 135mm Lens, Pentax Super-Takumar f/2 55mm Screw Mount. I need an adapter to use these on my k-50, can I get some suggestions to help me find one. Thanks everyone.

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08-16-2015, 05:50 PM	#2
Aaron28 Pentaxian Join Date: Jan 2015 Location: Huntsville, Al Posts: 7,131	if they are m42 thread this may work M42 Lens to Pentax PK K Mount Adapter Ring Focus Infinity M42 PK \| eBay

08-16-2015, 06:07 PM	#3
patrick9 Site Supporter Join Date: Feb 2011 Location: Murfreesboro Tennessee Photos: Gallery \| Albums Posts: 3,458	I would recommend using a Pentax brand adapter. I have a friend that had trouble with the aftermarket one ,but no trouble with his Pentax brand one. I have read of others reporting the same. He loves his Super tac's. Is the Vivitar a K mount?

08-16-2015, 06:15 PM	#4
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	If you can find one, get the Pentax brand adapter rather than a knock-off. The cheap ones usually work but quality control is erratic and some can end up stuck on your camera and you cannot get the lens off without a lot of work. The Pentax one usually goes for about $30 and works perfectly.

08-16-2015, 07:08 PM	#5
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,766	best information out there for mounting and using M42 lenses: https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html

08-16-2015, 07:38 PM	#6
ramseybuckeye Site Supporter Join Date: Apr 2009 Location: Hampstead, NC Photos: Gallery Posts: 17,295	There are used and new adapters on ebay (search for genuine Pentax adapter) at various prices. Once in a while you may see one on a k-mount film camera with a screw mount lens attached. You can also find them new at B & H and Adorama right now at about $45 each.

08-16-2015, 08:19 PM	#7
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,454	I have the Pentax and a Kalt. They both work but my Kalt requires a tool to remove (came with it). My Kalt was a NOS item. Another approach some people use is to dedicate a cheapo adapter to each lens - they remove the spring clip first and then get it tight (not sure how) and they treat it like a Kmount from then on.

08-17-2015, 02:54 AM	#8
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,766	or dedicate a second camera body to the use of M42 lenses...