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Old 20-03-2019, 07:06 PM
Ukastronomer (Jeremy)
Feel free to edit my imag

Ukastronomer is offline
 
Join Date: Jan 2019
Location: Llandysul, WALES, UK
Posts: 1,381
That is what i said



FROM Daystar Instruments
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On Wed, Feb 27, 2019 at 10:46 PM Tiffany Messerschmidt <tiffany@daystarinstruments.com> wrote:
Jeremy,

It is correct to say a front mount ERF is not needed with a 120mm refractor.

You only need a blocking filter before the diagonal and do not need any front mounted one on scopes up to and including 120mm as long as it is not an oil spaced doublet/triplet
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