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Message: <blockquote data-quote="Sirius Birder" data-source="post: 1111773" data-attributes="member: 60842">David,I did use the binoviewer with the C5, but at the time I felt it was not giving  bright enough images.  The C5 I had at the time was much older, and I am sure that the Starbright XLT coatings on my C6 are one reason why I get brighter images.  Of course, the C6 also has better resolution, and I prefer the higher powers with the same eyepieces.I use the Baader Amici prism in the upright position, so I am looking down through the binoviewer.  The weight of the binoviewer makes any other position impractical.I have a Siebert 0.6 focal reducer, and have used it in the past.  I have no problem obtaining focus with the focal reducer, but I prefer to use longer focal length eyepieces if I want lower power.  I have a pair of Celestron 32mm plossls that work nicely for this.  There is no vignetting with these, but there would be with anything longer.Again, let me say that the C5 makes a nice little terrestrial scope, and is very portable.  It compares very favorably with any of the current crop of refracting spotting scopes, and with its five inch aperture, beats the 3.5 inch Questar in terms of brightness and resolution.  By the way, the Questar is about an F12 I think.  However, the C6 just blows away the smaller scopes.  It is just more of a load on your shoulder, and really requires a more massive fluid head and tripod than the typical scope.  Otherwise, the shakes will negate any high power use.  I am attaching some photos of my C6 setup.  In the pictures you can see how I set up the binoviewer, my aiming device that takes the place of a finder scope, the flocking that I put in the tube, and my fluid head/tripod combination.  By the way, the fluid head was a gift from a local TV station.  It was junk for them, a treasure for me.  The tripod is an old Davis/Sanford that I bought from eBay for $75.  The fluid head and tripod are absolutely rock solid, so that I can use the scope at 100 power in the wind with no shakes.John Wright</blockquote>

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