Hi mate.
I think if you look closely under Point 1, I do say it's f5.5 and the picture backs that up.
In the price comparison of a similar new mirror from Galaxy Optics I used their current configuration of f4.2 as that is the only 18" they currently produce.
I hope that clarifies it
Cheers
Les
Quote:
Originally Posted by Zubenel
HI Les ,
In your preamble youo said that the 18” was a f4.2 focal length however the engraved data says that it's an F5.5. Can you please clarify ?? Cheers Zub
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