NS11 GPS with Denkmeier Power Switch

Hi All,

I recently obtained a used S1 Power Switch and tried it out with my NS11 last night thinking this would be an upgrade from using the Celestron 0.63 reducer/corrector. The PS is definitely more convenient to switch between powers but I'm still seeing significant field curvature using the reducer with a 20mm ES, 17mm Ethos, and 20mm Nagler T5. Can someone verify that that Power Switch reducer does not correct for FC like the Celestron unit, or could my PS be defective somehow?

Thanks, Tom

Thomas Bennett said:

Hi All,

I recently obtained a used S1 Power Switch and tried it out with my NS11 last night thinking this would be an upgrade from using the Celestron 0.63 reducer/corrector. The PS is definitely more convenient to switch between powers but I'm still seeing significant field curvature using the reducer with a 20mm ES, 17mm Ethos, and 20mm Nagler T5. Can someone verify that that Power Switch reducer does not correct for FC like the Celestron unit, or could my PS be defective somehow?

Thanks, Tom

It's not defective. I find the Denk (Starsweeper) reducer very good indeed, but if it has any flattening characteristics at all, it's not to the extent of the r/c. Still, more than good enough for me, as I don't tend to worry about the extreme field edge, anyhow.