Vixen Sphinx Skybook Display Flicker
Posted 26 February 2010 - 01:24 PM
BTW, I was really happy to discover that both axes on the mount were not at all tight, as some have experienced with their mounts. The bearing adjustments seem to be spot on, and turn just as easily as my GP! (That was a real load off!)
I sprung for the PA scope, but was disappointed to see that Vixen had obstructed the PA window on the mount with metal protrusions that are meant to keep little fingers from getting lopped off! I hope it doesn't affect my being able to see Polaris under less than transparent skies.
Also, from time to time I've run across posts where people discovered that, though the DEC clamp has two knobs, that only one knob actually tightens the clamp. I have discovered that both knobs will tighten the clamp, you just need to either turn one knob fully clockwise, or turn the other fully counter-clockwise. Both knobs are on the same shaft, which actuates the locking mechanism. It's actually a pretty elegant design once you realize that "righty-tighty" works with only one of the knobs!
I think I'm really going to like this mount...
Posted 26 February 2010 - 02:34 PM
The polarscope should work fine, another thing - I got mine S/H and one of the thin wires in the starbook to mount cable broke where it went through the ferrite bead thing, the cable bend is too severe, I repaired the cable and ditched the ferrite, has no affect on operation nor does it end up affecting other equipment.
Nice light mount and very capable.
Posted 26 February 2010 - 06:00 PM
Oh well, aside from slightly noisy motors (I believe they're the new motors as the Skybook has a setting that allows you to cut the fast slew speed in half in order to decrease the motor noise) I am loving this new mount! It's very intuitive, both to set up and run.
Once the snow/rain/clouds clear out, I should get a better idea of how it's performing. With all the noise the motors seem to make, I wonder if it would quiet down if I upgraded to the current version?
Posted 26 February 2010 - 08:05 PM
Posted 26 February 2010 - 08:19 PM
Posted 27 February 2010 - 04:52 PM
This is correct. However, Vixen has added little metal fingers to the front opening of the PA "OTA" behind the round blue plastic cover. This is to keep small finger from getting pinched by the hole in the DEC shaft when the scope is slewed away from pointing west.
If you slew to the west using the Starbook, the obstruction of the polar axis scope disappears.
Posted 27 February 2010 - 06:08 PM
Posted 27 February 2010 - 10:50 PM
If I had a nickel...
Yeah -- I realized that's what you were referring to after I posed my response.
Posted 28 February 2010 - 03:10 AM
The starbook LCD is too bright in the field, maybe you would like to add a dimming sheet on it. Then you would have a larger range to adjust brightness.
My mount is quite noisy indoor but is acceptable outdoor. It's because of its motor type so I don't think firmware update will make any improvement. (Mine is v2.1b42.)
Just FYI, remember to do your alignment in 2 stars in the west then 2 stars in the east and no star in polar area sequence. That will improve your goto precision a lot.
Posted 28 February 2010 - 03:48 AM
Thanks for the good advice re: alignment stars. I think I'm going to experiment with doing two stars in the quadrant of the sky I'm viewing in, and add additional stars in pairs as I move to different quadrants. Since I'm not doing AP, that should be more than enough, though time, and experience, will tell.
My backlight seems to get really dim, though it may not be dim enough in the end. I want to put film on the display anyway, to protect it from scratches. Since none came with the mount, I'll need to check with Vixen to see if they still sell it.
Again, good advice, thanks!
Posted 28 February 2010 - 08:38 AM
Posted 28 February 2010 - 11:28 AM
I jumped all over that! Thanks.
I recently got my film from telescopes.net for $5.95 (http://telescopes.ne...item/VIXEN-2529), free shipping. Includes 2 sheets from Vixen. I also saw at the yahoo Sphinx users group that others are using 3M privacy sheets in addition to shield others from the screen.