IDAS Filter Thickness

As mentioned several times here, modern optics such as BORG 55FL F3.6 and SIGMA Art-series are so sensitive to BF distance. Probably some others are too. Anyway, BF distance adjustment is getting more critical than before.

So I prepared each data as follows



I’m using this blog as the data storage so that I can pull back various test result and info etc myself. My brain is getting older and older. I can’t keep all of them in my mind any more. This blog is very convenient tool myself too.

So please use “search box” located at the upper right as well.  You might be able to find out something you are researching for as your reference site.


~ by tedishikawa on November 10, 2017.

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