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Re: It works! NINA, ASTAP, Model, new AP1100AE
Hi Linwood nice to hear your success >>> if you have an all sky model, should you check the DEC Arc tracking anyway? it's an optional feature, but yes I suggest you check it. It's a "tracking improvement" feature. The worst that happens is your guiding doesn't improve, and you can disable it Brian
On Mon, Sep 27, 2021 at 6:06 PM ap@... <ap@...> wrote: Ok, it's another one of those "surprise, it did what it said it would" posts, but... first really clear night since i got the mount (2 months ago). First real model where I could get the whole sky. --
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Re: It works! NINA, ASTAP, Model, new AP1100AE
ap@CaptivePhotons.com
Bill Long wrote:
Despite vendor wishes to the contrary. 😊
Of course, it presumes the wisdom to notice a problem. Something I worry about at times.
I stare at the numbers and even if I know a definition, I lack the context to know if it is actionable. E.g. is 113 Tube Flexure, for a C11 on an AP1100 grossly awful or really good or somewhere in between? (Or maybe more to the point are any of these actionable intelligence about one’s setup; maybe the answer is problems show up elsewhere, this is not a good place to look).
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Re: It works! NINA, ASTAP, Model, new AP1100AE
Bill Long
Definitely best to encounter a problem before paying a load of money to fix it. :)
I have always assumed the numbers on one side being different than the other were due to orthogonality issues or a slight pier imbalance. Ray would know better though.
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of ap@... <ap@...>
Sent: Monday, September 27, 2021 6:33 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] It works! NINA, ASTAP, Model, new AP1100AE Bill Long wrote:
Other than a need to refocus after long slews, it really is more of a theoretical problem than one I notice. I spent a lot of time researching external focusers (and rotators and tilt adapters) and just decided to wait until I was sure I had a problem that needed fixing. Frankly with talk of focuser sag (I have a fairly heavy camera) on some of them, and others that eat up too much back focus, indefinite delays on others, and the price tag on some … Well, waiting for the problem to become more evident.
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Re: It works! NINA, ASTAP, Model, new AP1100AE
ap@CaptivePhotons.com
Bill Long wrote:
Other than a need to refocus after long slews, it really is more of a theoretical problem than one I notice. I spent a lot of time researching external focusers (and rotators and tilt adapters) and just decided to wait until I was sure I had a problem that needed fixing. Frankly with talk of focuser sag (I have a fairly heavy camera) on some of them, and others that eat up too much back focus, indefinite delays on others, and the price tag on some … Well, waiting for the problem to become more evident.
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Re: It works! NINA, ASTAP, Model, new AP1100AE
Bill Long
Its a little bit different of a ballgame with SCT's though. I think with an external focuser and the mirror locks engaged you can mitigate the flop issue that can cause problems.
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Joseph Beyer <jcbeyer2001@...>
Sent: Monday, September 27, 2021 6:23 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] It works! NINA, ASTAP, Model, new AP1100AE With the encoders and a good model your reliance on guiding will be a lot less. The guider wont have to work as hard to keep the course. I’ve stopped guiding at all with my Mach1 using 50 point models at short focal length (530mm).
On Sep 27, 2021, at 6:06 PM, ap@... wrote:
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Re: It works! NINA, ASTAP, Model, new AP1100AE
Joseph Beyer
With the encoders and a good model your reliance on guiding will be a lot less. The guider wont have to work as hard to keep the course. I’ve stopped guiding at all with my Mach1 using 50 point models at short focal length (530mm).
On Sep 27, 2021, at 6:06 PM, ap@... wrote:
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It works! NINA, ASTAP, Model, new AP1100AE
ap@CaptivePhotons.com
Ok, it's another one of those "surprise, it did what it said it would" posts, but... first really clear night since i got the mount (2 months ago). First real model where I could get the whole sky.
NINA and ASTAP used, 79 points, 79 good, none failed, 32 minutes (about 2.5 points per minute) with a C11 @ 2800mm, ASI6200MM bin 2, 3 sec exposures. Polar aligned with NINA's new tool. With light winds (gusting to 5mph with a big dew shield on it), PHD2 over 200 seconds shows RMS error of 0.46" -- with guiding OFF (Guiding Assistant). First slew across half the sky plate solved to 20" by 1" off. Many thanks to Dale, Ray and whoever else helped with the NINA/ASTAP integration. I can't get my camera to work reliably with APPM directly, and I really didn't want to use TSX, so this is a terrific combination, and at least to me seems quite fast. Not sure I NEED a model but it is nice to know I can build one reasonably fast. I'm now imaging and guiding at 0.31" RMS despite the light wind (prior mounts almost any wind with that big dew shield was a mess). All that with a non-locked mirror as well. So I do have one question: if you have an all sky model, should you check the DEC Arc tracking anyway? (I realize the model is not really important since I'm guiding, but trying to learn in case I want to ever image unguided. ) So anyway, thanks again for all that made the new integration work! Linwood
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Re: APCC Temperature readings
S Berrada
Hi,
Based on my limited research, it seems that temperature will have a bigger impact on refraction than barometric pressure - this is because of the magnitude and rapidity of change. Both are important to input in APCC, but accurate temperature seems the most important. https://en.m.wikipedia.org/wiki/Atmospheric_refraction
Refraction increases approximately 1% for every 0.9 kPa increase in pressure. Similarly, refraction increases approximately 1% for every 3 °C decrease in temperature
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Re: Is this tilt in the image train?
Tom Blahovici
Yes I have noticed this myself. Stacking the images usually reduces the abberations.
The direction of tilt shown by CCD inspector is the same as before. I wonder if the new ap mount is now more accurate now that the stars are more steady. Before I would have 0.7,-0.8 arc sec RMS tracking, now down to .25. Tom
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Re: Is this tilt in the image train?
On Mon, Sep 27, 2021 at 02:49 PM, Joseph Beyer wrote:
Initially I connected my filter wheel to the camera with the stock tilt adjuster sandwiched in between. Images were terrible with elongation of stars nearly across the frame. I removed the tilt adjuster and immediately got better stars but not great yet.Interesting. -- Dean Jacobsen Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/
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Re: Is this tilt in the image train?
Joseph Beyer
The individual sub images are more telling of the remaining problem. Stacking the subs seemed to “fix” the remaining elongation more than I expected. I agree with you though, it sure looks reasonable. I’ll post a link to one of the subs later. Good luck!
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Re: APCC feature request - Get time from mount
Nick Iversen
Ray
I can get the mount's time from the site tab but then I have to manually set the computer to that time - a bit of a pain to do with any accuracy (but good enough for most purposes). The computer is not connected to the internet so nettime is not an option (although it is installed). Regards Nick
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Re: APCC Temperature readings
Tom Blahovici
Hi
Not only that, but I have an MGBox V2 and a Sensorpush high accuracy sensor for temperature and there is a three degree difference between them....
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Re: Is this tilt in the image train?
Tom Blahovici
Joe,
That image is close to perfect. You would never see any funny stars even with a 4 foot wide print. So my next outing will be to tighten everything up. That includes the adapters and the screws on the flanges for the nightcrawler. Then I will start looking. 1) Take images at different points in the sky to see if things shift. 2) If not then attempt to adjust the tilt. I guess I should attempt this before returning the scope. If I do send the scope, then it will wait until March when I switch scopes to my galaxy scope. Thanks all.
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Re: APCC Temperature readings
S Berrada
Hi Dale and Sebastien- thank you so much, this is very helpful.
I can see how temperature is important for the APCC model, but does anyone have an idea of how important barometric pressure or RH are ? Thanks sam
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Re: Is this tilt in the image train?
Bill Long
Mine was fixed in Houston as well. AndySea on CN had to have his sent back to Japan.
From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Luca Marinelli <photo@...>
Sent: Monday, September 27, 2021 2:45 PM To: main@ap-gto.groups.io <main@ap-gto.groups.io> Subject: Re: [ap-gto] Is this tilt in the image train? No, the collimation for my FSQ106 was performed in Houston. It didn’t have to go to Japan.
Luca
On Sep 27, 2021, at 5:40 PM, Tom Blahovici via groups.io <tom.va2fsq@...> wrote:
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Re: SH2-171 on Mach2 and new Moravian c3 61000 Pro (Sony IMX 455)
Andrea Lucchetti
thank you Luca!
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Re: SH2-171 on Mach2 and new Moravian c3 61000 Pro (Sony IMX 455)
Andrea Lucchetti
Eric, see here below: Q:Did you purchase your Moravian equipment direct from the factory or are you fortunate enough to have a distributor nearby? A: I have a distributor now but I can tell you I bought the first camera directly from them and it was the same. but I understand the concern. sending material in the US from here is a nightmare (if you don't fix the papers before the shipment you get 24% duties on the original value...) Q:Do you have any experience with their OAG or Ethernet adapter? Although, I don’t see much use for the later. A: no, in the past I had a monster MOAG from Astrodon. I suppose the OAG is perfect if you use a moravian guider. I've tried a usb 3.0 extender and it works. of course if you need to run cables in conduits that doesn't work but in my experience it is better to have a pc nearby and have a remote desktop connection to that pc. Q:You mentioned the cooling was effective, but not impressive. Do you have the standard or enhanced cooling model? A: standard model. with this cmos I don't think a few degrees below really matters. noise is very low in any case. and the camera lighter. You can always PM me if you need more info, pictures, frames, etc Andrea
Il giorno lun 27 set 2021 alle ore 22:45 Eric Weiner <weinere@...> ha scritto:
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Re: Is this tilt in the image train?
Tom, I have a 2016-2017 vintage FSQ-106, the model where they changed the color from white to a bluish white. I’ve used a full frame Nikon D800 for several years and it will produce pinpoint stars across the entire sensor. I’ve not had a problem with my current scope as long as I’ve owned it. I recently purchased an ASI6200 and am dealing with the same problem you are. Given my prior camera experience I know it’s the new camera causing problems. Initially I connected my filter wheel to the camera with the stock tilt adjuster sandwiched in between. Images were terrible with elongation of stars nearly across the frame. I removed the tilt adjuster and immediately got better stars but not great yet. Here is the first test image with 30 X 90 second exposures (45 min) https://www.astrobin.com/wgfes0/0/ . The image is completely full frame with no cropping and was calibrated with only darks and bias as I was interested in seeing what degree of vignetting I was going to get with m48 connectors. I’ve since purchased a Gerd Neumann CTU but haven’t gotten it set up due to the terrible conditions we’ve had out here in CA.
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Re: Is this tilt in the image train?
Luca Marinelli
No, the collimation for my FSQ106 was performed in Houston. It didn’t have to go to Japan.
Luca
On Sep 27, 2021, at 5:40 PM, Tom Blahovici via groups.io <tom.va2fsq@...> wrote:
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