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My understanding of the focus knob found on SCTs (all?) is that it is
attached to a long screw thet is on the back of the mirror. It would seem to me that if one turns the screw CC that it would pull the mirror toward the observer; thereby moving the focal point of the mirror inward. I tried this with a 4" Meade SCT, and the focal point moves outward? Perhaps this depends on where one things the head of a typical screw is in the device. I would guess it essentially be where the focus knob is located. Can anyone clear this up? Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA) (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time) Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet -- "Summertime, And the livin' is easy Fish are jumpin' And the cotton is high ..." -- G. Gershwin Web Page: home.earthlink.net/~mtnviews |
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