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Modified ST102 & 19mm Luminos


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I'm hoping to get the ST102 out fairly soon, preferably on a Moonless night.

 

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Weight and balance trials with the Porta II/TL130 combination seem promising with the 19mm Luminos. The Altair dielectric is one of the few twistlocks that holds the Luminos safely. 

 

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The Luminos aren't half as bad as many would have you believe. I like their overall visual ergonomics and the 19mm seems much less 'squinty' than the 18mm ES equivalent.

 

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OK, there's the EOFB amongst other quirks, but I really like the 30mm field stop, even if the eyepiece does weigh almost as much as a two door Volvo. Although I admit they probably perform better with slower focal ratios (Luminos, not Volvos). 

 

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This gives 26.3x and just over three arc degrees true field (grey reticule circle above). 

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