Celestron or Antares f/6.3 focal reducer for SCT?

[Torazz]

Hi,

Does anyone know if the Antares 4000 focal reducer is as good as the Celestron focal reducer. The Celestron f/6.3 is ~£150 compared to the Antares at ~£70.

Any comments gratefully received.

[riklaunim]

They are reported as identical. If you want to use them for visual - try maybe long focal length eyepieces rather than the reducer.

[Torazz]

Thks for that and its not for visual it for astrophotography.

[riklaunim]

I have Hirsch focal reducer, which is yet another clone of the Celestron reducer. The problem with those SCT reducers is that they cause chromatic aberration and require refocusing when using parfocal RGB/other filters

[MartinB]

I have Hirsch focal reducer, which is yet another clone of the Celestron reducer. The problem with those SCT reducers is that they cause chromatic aberration and require refocusing when using parfocal RGB/other filters

I've never found my 0.63 reducer causing CA when used with my SCT. I focus using a moonlight electronic focuser and focusmax. The focus barely shifts between filters and I suspect any shifts I do get are down to the filters and changes in temp. I happily cycle through LRGB filters to build the image rather than do a whole run of one filter at a time.

I doubt there is any difference between the Antares and the Celestron except price

[BlueAstra]

I have this one Opticstar F6.3 Focal Reducer / Corrector. which looks like the same one. I use it on my C8 SCT with a 1000d, and it seems to do everything written on the tin. Not noticed any optical problems.