[Aavso-photometry] Focal Reducer

[RBissinger at aol.com]

Greg,

I've used the 0.5x Optec reducers with both an ST-7 and ST-10 with good results.  I'd be a bit concerned about using a 0.33x reducer for precision photometry due to increased likelihood of vignetting and gradients, but others may be using them with success.

In a message dated 1/22/2005 1:45:12 PM Eastern Standard Time, Greg Spear <gspear at ucolick.org> writes:

>
>I am in the process of configuring a setup for Transit Search which
>consists of an Meade LX-200GPS and a SBIG ST-7XME. I'm looking for a
>good focal reducer suitable for high precision photometry (< .01 mag)
>
>So far, I've found:
>   Optec NextGEN MAXfield 0.33x
>   Meade Series 4000 Focal Reducer .33x
>
>Does anyone have any recommendations or other reducers?
>Does anyone have any experience with these or comparison information?
>I have found some information on the Internet but would like to hear
>something from those doing photometry.
>
>Thanks
>
>Greg Spear
>gspear at ucolick.org
>
>
>_______________________________________________
>Aavso-photometry mailing list
>Aavso-photometry at mira.aavso.org
>http://www.aavso.org/mailman/listinfo/aavso-photometry
>