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Re: [William Optics] Williams optic FF II distance to CCD ??

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  • Manuel Cravo
    Hello,  Suggested is 56mm. Minus about a half to one MM for each filter (glass thickness). Here is the WO link.
    Message 1 of 2 , Jan 15, 2013
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      Hello,
       Suggested is 56mm. Minus about a half to one MM for each filter (glass thickness). Here is the WO link. http://www.williamoptics.com/accessories/reducer_spec.php .
       
      Good day,
      Manuel Cravo

      From: Joe Perulero <joepickard007@...>
      To: William-Optics@yahoogroups.com
      Sent: Tuesday, January 15, 2013 3:13 AM
      Subject: [William Optics] Williams optic FF II distance to CCD ??
       
      HI All

      Does anyone know what distance the ccd chip needs to be behind a WO 0.8x FF II ??

      At the moment I have it at 44mm but I am getting some coma on some corners. (Using qhy8L ccd)

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