EXAKTA (Cosina) 24mm f/2.8 Macro P-KA lens

Started Jun 6, 2011 | Discussions thread
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Kerusker
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EXAKTA (Cosina) 24mm f/2.8 Macro P-KA lens
Jun 6, 2011

Looking for a 24mm KA-lens I was lucky to acquire one of these on *bay for about 55 EUR.

This lens seems to be available from different brands and was build by Cosina AFAIK.

Although it only has five aperture blades, I like the Bokeh. It's sharp wide open and can focus down to about 15cm. See three examples taken with my K-5 in the reply.

The only thing which isn't quite right:
I have to compensate exposure for smaller apertures by -0.5 to -1.5 EV.

Lenses with KA mount should have a linear aperture steering (in contrary to older lenses like M or P). So here's my question:

Is there a model of this lens which has linear aperture steering (as required for A lenses)?

Thanks
--
][.Kerusker
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