Quote:
Originally Posted by ausastronomer
Hi Col
Have you tried it in the Portaball?
I am curious to see how it goes in scopes faster than F8. I think as David mentioned, it might struggle at faster than F6 due to only 5 elements and 85 degrees.
In those slower scopes I am sure it will perform really well with sharp contrasty images.
Cheers
John B
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John ..... my PortaBall only takes 1.25 Eyepieces and is of a ' Helical ' Design.
Superb in ' Fluorite ' TAK f/8.... I haven't got around to using it in my f/15 Refractor .
Excellent in ' slow ' f Ratio instruments.... more so Refractors
Cheers Col....