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

Started Jun 6, 2011 | Discussions thread
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Kerusker Senior Member • Posts: 1,034
EXAKTA (Cosina) 24mm f/2.8 Macro P-KA lens

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)?

we don't see that we don't see (eye's blind spot)

my albums: http://picasaweb.google.de/Kerusker

 Kerusker's gear list:Kerusker's gear list
Pentax K-5 II Pentax K-5 Pentax smc DA 15mm F4 ED AL Limited Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM Pentax smc DA 55-300mm F4.0-5.8 ED
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