| Subject: | [OM] teleconverter elements..how many is good? |
|---|---|
| From: | William Clark <wclark@xxxxxxx> |
| Date: | Wed, 19 Dec 2001 09:27:08 -0500 |
Hey all,
I just noticed that my 2 Vivitar MC teleconverters are a bit
different. I have the Macro-focusing one (7 elements in 5 groups) and a
non-macro one with 4 elements in 4 groups (both teleconverters are 2X).
Which one is better? I am not sure what an extra group and more elements
give you. Would the extra group impede light transfer in astrophotography?
Thanks for any help....
-Bill
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