Actually there may be a small effect when the PEC is not trained. If the gears have an error of +/- 5 arc seconds that can introduce up to a 10 arc-seconds pointing error, which is significant if you

In a message dated 1/8/01 10:29:26 AM Central Standard Time, ray@... writes: << I just used trial and error. On the elevation one-quarter turn (I think) was about 20 arc mins. If Roland

I just used trial and error. On the elevation one-quarter turn (I think) was about 20 arc mins. If Roland posts the threading on the elevation knob and the EW knobs you can calculate with Trig how

In a message dated 1/8/01 1:21:30 PM Central Standard Time, jgortatows@... writes: << For example on powerup of the mount, does it send anything out to the serial ports? >> No, only if you

Thanks Ray, One other question. After you take the six stars positions and TPoint gives you the numbers on how far off the pole you are, say 1.1 deg elevation and 34 min azimuth, How do you know how

Hi Andy, I currently use a JMI DRO focuser controlled through 100 feet of cable. However, I am planning soon to move to the RoboFocus product from HomeDome to take my automation one step

Ray, How do you remote focus the instrument? How long are your serial cables from the computer to the mount? How many TPoint targets to you take in a run for polar alignment? Thanks Andy Also, if

In a message dated 1/7/01 9:40:07 PM Central Standard Time, j.zakariasen@... writes: << m thinking that using the :U# command may help, but I'm not sure if you are supposed click the send

Hi Jerry, I don't know if the 900GTO has the same accuracy or not. Perhaps Roland will comment. Still, 60 arc seconds is very good. My first few attempts were about that accuracy. You need to press

Hi Ray, It sounds like you are using the exact software that I am trying to get a handle on! So far using T-Point I've not gotten the pointing any better than 60 arc seconds RMS. Your figure of 20

Hi Gary, Tracking is excellent on my 1200 GTO. When well polar aligned I can go unlimited exposure length with PEC enabled with my Traveler. In fact all of my H-Alpha mosaics were unguided exposures.

Thanks Jerry! I'm sure you will be extremely pleased with your 155. -Ray

Ray, excellent images of M81 and M82. From the looks of the stars it appears the AP1200 does a good job of tracking. What kind of tracking accuracy are you typically getting with the mount and the

Wow Ray, very impressive work on both the imaging and on the processing. Truely a spectacular result! Very nice detail on the dust lane in M81. Can't wait to get my 155. Jerry

Here are some recent images I took with my AP equipment (AP1200GTO and Traveler mounted on 155EDFS). The first is a widefield shot of M81/82 with my ST-8E CCD camera and Traveler at f/4.5. It is 20

In a message dated 1/2/01 8:45:00 PM Central Standard Time, j.zakariasen@... writes: << What I have been doing is firing up the AP and getting it centered on a bright star. Then I establish

Happy New Year Everyone, I got the above two programs for Christmas and have been out experimenting a couple of nights. I must say that the pointing improvements derived from T-Point are quite

Hi Gary, I have an AP-1200 that is semi-permanently mounted. With reasonably accurate polar alignment and good OTA orthogonality, I get about +-2.5 arc-min over most of the sky. With T-point, I get 10

I have a 1200 mount with a 6in. f12 and ST7. With moderate attention to orthogonality and scope alignment, I get about 3-4 a-min pointing accuracy (this is the max error) at all parts of the sky. If

Pointing depends on orthoganility of your OTA on the mount and polar alignment to name but a few, but the accuracy can be very good indeed, such that an object is on the chip every time. Periodic