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Old 21-05-2014, 11:22 AM
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Varangian (John)
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Join Date: Feb 2012
Location: Melbourne
Posts: 599
17.3 mm Delos in a GSO Newt.

Hi all,

I am seriously considering one of three EPs - the 17.3 Delos, 17 mm Vixen LVW and the 16 mm ES 68*. I own the 10 mm Delos and I love it although I have established that the 17.3 mm is not parfocal with the rest of the Delos range (from 12 mm down). I intend to use the 17.3 mm in a 12" GSO Newt and was wondering if there are any other IISers who have viewing experience with this combination (or simply with the 17.3 mm with a fast Newt). I have scoured both IIS and CN for reviews and most seem to be very good re. the Delos and LVW and more variable with the ES but still quite good, although I'm struggling to find good reviews of the ES in a fast newt.

I have just two questions I would like to ask and if anyone could assist it would be greatly appreciated.

1/ I would like to know whether the 17.3 Delos will reach focus in my GSO focuser without the need for an extension tube (or lack of inward travel).

2/ Does anyone have experience with the 17.3 in a fast Newt and can you please provide a brief opinion on this combination?

Thanks all in advance.

Last edited by Varangian; 21-05-2014 at 12:21 PM.
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