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Hi Paul...I've got that one but what I'm trying to do is extrapolate that to the 4x6"photo print of my star trails. If I had used the st-4 or st7e I know this would be a lot easier than photo

A simpler formula for #1 below is: Arc-secs per pixel = (pixel width / FL) * 206 You can nearly do this one in your head. Certainly with a simple calculator. It provides almost exactly the same

You know,my poblem has always been that I'm an economist and not a mathematician.I can tell you why or why not we'll never make any money at this but I can't figure out arctans...I'm going out to buy

Jimmy, 1. You can calculate arcseconds per pixel with the following formula: ArcSec = 3600 * ARCTAN( (PixelWidth * 10^-6) / FL ) Where: ArcSec = Width of Pixel in Arcseconds

Hi Neal,it's looking good.I put a third 1"long bearing in each of my axies and it improved nicely but not like yours. By coincidence,I offset my mount and took a few before and after startrails. The

Hi all, Well, I'm reasonably pleased with the improvement that I have been able to achieve in my G11's tracking and periodic error. Take a look at http://www.barry.net/Astro/losmandy_g11_ra_pe.html

That's great news. Thank you Scott.

yes.mine went in 3/4's by hand (very easy,slight pressure no banging) I might have put it all the way in but I felt using the thick washer and clutch handscrew would seat it better and more

What's the proper way to use the vernier markings on the manual setting circles?? I understand that it is to interpolate between hash marks, but it doesn't seem to work the same as my vernier

wrote: different city with the it turns movement it's axis off bearing Hi Jimmy OK, according to your post on sct-user's group #12966, I need bearing set skf ba2016. Since I don't use digital

Hello To All The bearing came packed in a shipping oil, after we installed them they were then lubricated with a Lithium grease. The mixture of this grease and the shipping oil whould harden in a

Hi Bill,somewhere's back a few days (wed?) I posted my results. The 3'rd bearing part numbers were posted too but I am in a different city today so can't get to my paper file to get it for you

Thanks Brian. This group has really taken off a big way which confirms that it's been long overdue! It's clearly a great learning tool for inexperienced users like myself but I'm glad to see that

Ottocycle wrote: Otto, You might try Radio Shack. -- Jim Girard http://www.teleport.com/~argo

Does anyone know where to get replacement 12V power cable connectors (or complete cigarette lighter ready cables) with the screw down collar? I have discovered that much arcing and sparking is

I have a GM-8/Gemini on order and one question that I have has to do with some Losmandy owners having to redo the grease on their G11/GM-8 mounts. Does Losmandy use a special shipping grease?

If you're suffering from stiction, you'll know it. It's the words "sticky" and "friction" combined, and refers to the situation when you have to apply a great amount of force to "break" an axis'

Excuse me if I missed this earlier. What exactly is "stiction"? I just received my GM8 and am wondering if this is a real concern and something I should worry about. Thanks, Brian

Hello Paul! I think you are right. Scott is sending me a new worm bearing block that will allow more movement. This will help to correct problem #1, but I am afraid that the major issue is #2. Do you

snightingale40@h...> wrote: near cost? Ditto everything Steve has said, except I need to fix lower dec axis, RA seems fine. Bill