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Forum: Pentax SLR Lens Discussion 12-29-2015, 03:10 PM  
Adaptall 2 P/KA adapter
Posted By UncleVanya
Replies: 2
Views: 1,084
There are fixed aperture values based on the last mount limitations.

See this:
Features and Operation of the Ka Mount

But that doesn't explain 2.4 nor exposure issues.

Exposure issues happen for me also. Some a series lenses give me trouble also. Center vs matrix could contribute to errors.
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