[jfegan12]

I was given a quantaray 70-210mm lens from a friend. Is there an adaptor that i can buy to connect this to my Kx? Sorry if this is a dumb question, I'm a newbie at this.

Thanks,

Jeff

[Adam]

No, you don't need an adapter, as it's a k-mount lens. Just put it on and follow the instructions for M&K lenses (ignore the screwmount info/adapter):

https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-manua...7-k-x-etc.html

[jfegan12]

Adam,

Can't get it to fit. It is a Quantaray 55mm lens, 70-210mm

[alohadave]

Adam,

Can't get it to fit. It is a Quantaray 55mm lens, 70-210mm

Can you take a picture of the front of the lens, and the back part and post them here?

Does your friend shoot Pentax?

[jfegan12]

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[mel]

Look at that funny notch on the upper right. Is that a K-mount? I've never seen a notch like that. I have an old Quantaray K-mount 135, and a newer (10ish years) Quantaray zoom. No notch like that on either of them.

[SOldBear]

Looks like Minolta MC/MD mount, won't fit a Pentax camera.

I don't think there is any adapter. But if there were, the value of the lens would not be worth it.

[boriscleto]

There is an optically corrected adapter for the Minolta MD mount, but it is not worth it for that lens.

[jfegan12]

Thanks so much for the help. Its great for those of us who are new at this to have a place to get good advice and answers.

Jeff

[Entropy]

I was given a quantaray 70-210mm lens from a friend. Is there an adaptor that i can buy to connect this to my Kx? Sorry if this is a dumb question, I'm a newbie at this.

Thanks,

Jeff

Some info on Quantaray - Quantaray is Ritz Camera's store brand. In general, Ritz rebadges products made by other manufacturers under the Quantaray brand. For example, the Quantaray 70-300 available in 2007 was a rebadged Tamron 70-300 lens. In other years it has been a Sigma 70-300. Most Quantaray flash units are rebadged Promaster units. Quantaray tripods appear to be Sunpaks.

When you have a third-party lens (Sigma, Tamron, Tokina, etc) you need to determine which mount the lens is meant for. If it's K-mount, it'll attach without any troubles. If it's not K-mount - You'll need a lens mount adapter, but in many cases a lens can't be adapted to K-mount without either corrective optics or giving up infinity focus. Also you'll likely lose aperture control with any mount adapters.

Some posters above improperly assumed that it was a K-mount Quantaray lens (which is possible - I have a K-mount Quantaray 70-300, the aforementioned rebadged Tamron), in your case it was a false assumption.

[Lowell Goudge]

there is an optically corrected Minolta MD to PK adaptor that will let the lens work in stopped down mode (like a takumar) I can't say I have tried the minolra adaptor but I have tried the nikon and canonn ones. They behave like a small teleconverter, the nikon adaptor with a mag ratio of 1.25 and the canon one at 1.45 I suspect the MD adaptor will be somewhere in the middle as a function of it's different regestry distance,

optically these adaptors are very poor at large apertures, with lots of colorbleed but stopped down are reasonable in IQ.