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retired2007 · 03-27-2020, 07:30 AM - **1 Like**

dose any one know if a Carl Zeiss Jena Sonnar 300mm f/4 lens will fit a k1, and do you need an adapter?
thanks

**pepperberry farm** · 03-27-2020, 07:42 AM

Originally posted by retired2007

dose any one know if a Carl Zeiss Jena Sonnar 300mm f/4 lens will fit a k1, and do you need an adapter?
thanks

that's going to depend on the lens itself and what mount it has - my guess is that it will be either an M42 or an Exacta mount, either of which will require an adapter...

Wasp · 03-27-2020, 09:13 AM

If it is M42 mount, adapting is straight forward. Pentax made such an adapter. There are many third party ones available as well.

Exacta mount can be done but it is a long story. The topic has been discussed here before, I believe. Look around.

kypfer · 03-27-2020, 11:23 AM

Originally posted by retired2007

dose any one know if a Carl Zeiss Jena Sonnar 300mm f/4 lens will fit a k1, and do you need an adapter?
thanks

Best post a picture of the actual lens you are interested in, showing the current mount. As it stands, unless it's already been modified, it's unlikely any Carl Zeiss Sonnar will fit your K1 directly. As to whether it can be easily adapted, will depend on what it's designed to fit at the moment.

03-27-2020, 07:30 AM - 1 Like	#1
retired2007 Veteran Member Join Date: Aug 2011 Location: new Albany IN Posts: 682	lens compatablity dose any one know if a Carl Zeiss Jena Sonnar 300mm f/4 lens will fit a k1, and do you need an adapter? thanks

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03-27-2020, 07:42 AM	#2
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 24,099	Originally posted by retired2007 dose any one know if a Carl Zeiss Jena Sonnar 300mm f/4 lens will fit a k1, and do you need an adapter? thanks that's going to depend on the lens itself and what mount it has - my guess is that it will be either an M42 or an Exacta mount, either of which will require an adapter...

03-27-2020, 09:13 AM	#3
Wasp Pentaxian Join Date: Mar 2017 Location: Pretoria Photos: Gallery Posts: 3,493	If it is M42 mount, adapting is straight forward. Pentax made such an adapter. There are many third party ones available as well. Exacta mount can be done but it is a long story. The topic has been discussed here before, I believe. Look around.

03-27-2020, 11:23 AM	#4
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 891	Originally posted by retired2007 dose any one know if a Carl Zeiss Jena Sonnar 300mm f/4 lens will fit a k1, and do you need an adapter? thanks Best post a picture of the actual lens you are interested in, showing the current mount. As it stands, unless it's already been modified, it's unlikely any Carl Zeiss Sonnar will fit your K1 directly. As to whether it can be easily adapted, will depend on what it's designed to fit at the moment.

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lens compatablity

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