Sorry, but there is nothing yet known as a replacement for doublet refractor.


Perhaps your query is too complicated? For example there are alternatives to the following parts of your query:

doublet (6)
refractor (28)

Maybe some reasonable answers will be found next time you come.

Your alternative for doublet refractor is not listed? Suggest!


No companions for doublet refractor have been suggested so far.
You have in mind a companion for doublet refractor and it is not yet here? Propose!



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