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12-27-2011, 11:54 AM   #1
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PZ-20 giving Inappropriate Lens warning with Promaster AF 28-200/F3.8-5.6 lens

I tried out my new-to-me Pentax PZ-20 yesterday with my new-to-me Promaster 28-200/3.8-5.6 AF lens (S/N 001908) and noticed that at focal lengths shorter than about 135mm the camera gives me an "inappropriate lens warning" with the built-in flash. This lens seems to be bigger around than my 35-70 lens but about the same length physically. Any ideas why the 28-200 would cause the camera to give an inappropriate lens warning with the built-in flash where the 35-70 would not? The manual over at says that an inappropriate lens warning is given for lenses with focal lengths shorter than 28mm, which this one is not.

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12-28-2011, 08:35 AM   #2
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Maybe the warning starts at <= 28mm, not necessarily <28mm? The flash will still fire though, right?

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12-28-2011, 09:16 AM   #3
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That's what's weird. The manual says it will give the warning with lenses shorter than 28mm. However with this particular lens, which is a 28-200, the flash warning starts with focal lengths < 135mm. It does not do this with a 35-70 manual focus lens attached (but the 35-70 aperture blades don't stop down like they should they've got something on them). I will know for sure when I get this roll of film developed as several shots were with the built-in flash at focal lengths less than 135mm.

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