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Mark as an owner of a lunt 100 I have found for visual a Zoom eyepiece is ideal.For imaging at higher mags I highly recommend the Vixen 2.4x Tele-extender from Astroshop. I often use this with a Celesteron Ultima 2x Barlow for closeups.Also the Orion 3x Multi element Barlow also works well.I have not had much sucess with the Powermates but that may be related to my camera the GSTAREX1. I advise you to test all your available combinations with your camera for best results. I have had some sucess with a 1.6extender from a binoviewer mated with a 5xPowermate. These high mag combinations although somewhat seeing limited may well be what is needed if you have students wanting higher resolution for research where aesthetics are not the prime concern.Not meaning to hijack your post I think you'll find this pic helpful(Venus Transit 1.6ext+ 5xPowermate) as it shows what the Lunt 100 is capable of in the hands of a novice.Also remember to look at the Proms due to its bandwidth this scope really is excellent here.I look foward to your reports on the new scope.
Cheers Derek
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