Re: [OM] C-U Lens follies

[Chris Trask]

     I thought as much.  I wouldn't mind finding one of those +0.5 close-ups.  
Tried years ago but they were scarce and expensive.  It might be more suitable 
to find a very short extension tube.

>
>Chromatic aberration gets worse with glass curvature aka magnification. 
>A +1 isn't straining much of anything.  The achromats become more 
>necessary as the magnification goes up.
>
>Chuck Norcutt
>
>
>On 5/6/2016 6:18 PM, Mike Gordon via olympus wrote:
>> There are several sites summarizing the achromatic diopters available.  
>>I am slightly puzzled as to why they are not all that readily available 
>>in lower powers.
>> I like this  site:
>>
>> http://www.ki.tng.de/~sgude/achromats.html
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Chris

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