Date
1 - 9 of 9
New polar scope
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Mauro Narduzzi
Hello group,
a simple question for Roland: does the new polar scope fit also older 900 GTO mounts? I have one s/n 900146, with upgraded control panel 2. And what about APCC? Clear skies. Mauro |
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Christopher Go
HI Mauro,
the new polar scope will be made to fit the old 900 and 1200. A new back plate will be made available for this. Regards, Chris At 04:29 AM 4/28/2012, you wrote: Hello group,Christopher and Vicky Go Christone Industries Manufacturer and Exporter of Quality Fossil Stone and Wrought Iron Furniture Cebu, Philippines http://www.christone.net Astronomy: http://astro.christone.net Red Spot Jr: http://www.redspotjr.com |
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parijat_singh
Will this new polar scope come factory calibrated ready to install or will need to be adjusted by user?
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Parijat --- In ap-gto@..., Christopher Go <chris@...> wrote:
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topboxman
Hi Parijat,
I am not sure if you saw this but I found this from a blogger who took an image through the new polar scope at NEAF: http://astropolis.pl/index.php?app=core&module=attach§ion=attach&att\; ach_rel_module=post&attach_id=76995 I am not sure if this is official but I do not quite understand why this is more accurate than conventional polar scope. Also, it does not look like it would work for Southern Hemisphere. I look forward to official description and operating manual for the new polar scope from A-P web site. Peter --- In ap-gto@..., "photonphisher" <parijat_singh@...> wrote: will need to be adjusted by user? older 2.900 GTO mounts? I have one s/n 900146, with upgraded control panel FurnitureChristopher and Vicky Go Cebu, Philippines |
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Robert Chozick <rchozick@...>
This looks like the finder in the iOptron. I am guessing something in the keypad or APCC software tells you where you line up Polaris on the "clock time" of the reticle circle and also which part of the line for that "time."
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Robert On Apr 28, 2012, at 10:15 PM, topboxman2000 wrote:
Hi Parijat, I am not sure if you saw this but I found this from a blogger who took an image through the new polar scope at NEAF: http://astropolis.pl/index.php?app=core&module=attach§ion=attach&att\; ach_rel_module=post&attach_id=76995 I am not sure if this is official but I do not quite understand why this is more accurate than conventional polar scope. Also, it does not look like it would work for Southern Hemisphere. I look forward to official description and operating manual for the new polar scope from A-P web site. Peter --- In ap-gto@..., "photonphisher" <parijat_singh@...> wrote: will need to be adjusted by user? older 2.900 GTO mounts? I have one s/n 900146, with upgraded control panel FurnitureChristopher and Vicky Go Cebu, Philippines Robert Chozick rchozick@... [Non-text portions of this message have been removed] |
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Bill Bradford
It is looks very similar to what I had with my Takahashi mount. There is a little utility that you run that tells you where to place Polaris.
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Bill On 4/29/2012 9:47 AM, Robert Chozick wrote:
http://astropolis.pl/index.php?app=core&module=attach§ion=attach&att\; |
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topboxman
I kind of figured that a simple software tool to tell you where to
position Polaris in the marked circle. Doesn't the marked circle look too skinny? Due to Earth's precession, how many years would this marked circle last? 5 or 10 years? Eventually, Polaris will be located outside of the marked circle, then what? Get another polar scope with new reticule or replace the reticule with an updated one? How is the reticule marked? Is it permanently etched in the lens or is it a separate glass like other conventional polar scope's reticule? Also, will the new polar scope work in Southern Hemisphere (I really don't care but just curious)? If Astro-Physics makes a claim that their new polar scope is one of the most accurate, then I believe them. They have never made any wild or exaggerated claims of their products. I trust them. I am simply making speculation. I just have to wait till A-P make an explanation of how their new polar scope works. Peter --- In ap-gto@..., Bill Bradford <bcbradford@...> wrote: is a little utility that you run that tells you where to place Polaris.http://astropolis.pl/index.php?app=core&module=attach§ion=attach&att\; \ ach_rel_module=post&attach_id=76995 |
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esotar330 <percymui@...>
Peter,
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All the polar scopes that I've seen have a separate glass that is etched with the reticle. Losmandy, Vixen and Tak (all versions) have this. To use the polar scope, all you would really need to do is to make sure your GTO keypad is set for the right location (long/lat/time zone) and then select the option for LST, or Local Sidereal Time. Match this up with the time scale, military time. The reticle horizon line still needs to be level to do this, otherwise it won't be accurate. This looks very similar to what they use in the Takahashi NJP mounts, except on the Tak there are no outer number hour markings. In the Tak manual, it starts off at the bottom at "zero" position. Going counterclockwise, you'll get the "6" (90 degrees away from the zero), then "12" (exact opposite of the "0"), then "18", then finally back to "0" reference. NJP polar scope reticle also has fine gradations representing every 20 minutes. Depending on how you look at it, you can either view it as "it's too busy looking" or "it has more accuracy". As for the other circles, I'm not sure how they are graduated, whether or not they represent every 5 or 10 years, etc. If you look at the AP polar scope, you'll see that the "0" and "12" positions are reversed when compared to the Tak NJP polar scope, necessary due to the 90 degree mirror. Not sure about the amount of magnification nor the approximate focal length of the new AP polar scope. Tak uses a polar scope which is very close to 300mm in focal length if I remember correctly for the NJP. The Losmandy is around 100 to 125mm, judging from the overall length dimension. EM200/EM2 is right around the 130mm range. Rear magnification eyepiece is around 11x for the NJP. Not too much eye relief, but it definitely gets the job done. Percy --- In ap-gto@..., "topboxman2000" <pnagy@...> wrote:
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Bill Bradford
The number of circles is a good point. On the Tak polar scope there were several circles that covered about 15 years, IIRC.
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Bill On 4/29/2012 3:09 PM, topboxman2000 wrote:
I kind of figured that a simple software tool to tell you where to |
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