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10-08-2007, 09:36 AM   #1
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Vivitar 70-210mm Series 1 Canon FD on K100D


Anyone know if it possible to mount a
Vivitar 70-210mm Series 1 lenses
(Canon, Nikon mount) on a K100D?

These lenses show up on Ebay quite
often at a lower price than the Pentax

Thanks in advance

10-08-2007, 10:13 AM   #2
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Join Date: Jul 2007
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Canon FD lenses have a flange-focal distance of 42mm. Pentax K cameras have their mounting flange 45.46 mm away from the focal plane. Basically, you can't build a simple mount adapter that would get the FD lens close enough to the K100D's sensor.

In theory, you could do it with an adapter that contained lenses to refocus the light coming theough the lens at a longer distance. In practice, such converters are pricey, often vignette the image, and add extra optical surfaces (that can reduce contrast and image quality) to the light path. I know of no such adapter for CFD-toPK.
10-08-2007, 11:24 AM   #3
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Welcome to the Pentax Forums stevera001

I love Vivitar lenses, although I haven't tried their 70-210.
There were 2 in excellent condition shown in the latest KEH flyier for $45.00

If you can find 1 in a Pentax mount I'd recommend a tokina SD 70-210 1:4-5.6 lens. They should be affordable, and I've gotten some great pictures with mine
10-08-2007, 11:45 AM   #4
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Original Poster

BTW, what is the KEH flyer? I am a newbie here..


10-08-2007, 12:08 PM   #5
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Your welcome.

KEH is one of the most trusted used camera stores in the US.

Here's their link
KEH Camera: Used Cameras, Digital Cameras, Film Cameras, Laptop Computers and More.
Once you buy 1 item from them your on their mailing list, and trust me on this.
Their flier is like a Christmas wish list

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