Search for the cheap new aps-c to adapt

Started May 25, 2020 | Discussions thread
OP MOD Tom Caldwell Forum Pro • Posts: 42,747
Re: Search for the cheap new aps-c to adapt

If you look up Wikipedia for double gauss you will find a quite large sample of named lenses that are described as “double gauss” type. I look to see characteristics that would make them stand out as that particular type and can see some of the significant features that might signify that this is their generic type - but I admit it is hard for someone not optical professional.  If you placed ten lens diagrams in front of me and asked me to categorise two of them as specifically double gauss I would probably fail.

But it is an interesting pursuit to see if I can identify “a type” - I am good at triplets ... at least most of the time ....

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Tom Caldwell

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