On 2011-04-25 19:56 , Jeffery Johnson wrote:
I am new to older lenses so will these even work on my K-R without
having to get an adopter and also are these worth buying.

SMC Pentax f  1:1.4/50

yes, and this is a desirable lens

zoom l37 52mm Nikon (the description she gave was for the filter that is on
the lens so not even sure what this lens could be.)

not a guess

sigma zoom 1:3.5-4.5 f28-84mm

assuming it's Pentax K-mount, it'll work, and it looks like an OK lens:

<http://www.pentaxforums.com/userreviews/Sigma-28-84mm-F3.5-4.5-for-Pentax.html>

here is some reference material:

<http://www.mosphotos.com/PentaxLensesExplained.html>

<http://www.pentaxforums.com/lensreviews/>

(note the link to third-party lens reviews in the header of the second page)

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