KyleStoke

Thanks Artem, think I read that when I originally set it up, I have the log uploaded on the SGP site and so far looks like some kind of string error

Hi Julian Yeah I saw that it was 100% not below the horizon, the scope was actually pointing at the target and had plate solved in the correct place. Obviously there is a conflict of some type there but no idea what it is

Hi Can anyone help with this, basically it looks like after a meridian flip the telescope will not perform the final slew due to it being below the horizon. The slew was centred on Gam Cyg so 100% was not below the horizon, the scope had already plate solved in the correct part of the sky. This is the relevant section of the log, Anyone any Ideas? 8/08/19 01:39:15.091][DEBUG] [PHD2 Listener Thread] PHD2 GetPhdStatus - Post-Wait: Stopped [08/08/19 01:39:29.710][DEBUG] [Recovery Sequence Thread] Something bad has happened... attempting to recover the sequence (attempt 12)... [08/08/19 01:39:29.710][DEBUG] [Recovery Sequence Thread] Recovery method using auto center (only) has started... [08/08/19 01:39:29.748][DEBUG] [Telescope Thread] Center telescope message received... [08/08/19 01:39:29.748][DEBUG] [Telescope Thread] Solving with Plate Solver Astrometry.NET... [08/08/19 01:39:29.772][DEBUG] [Telescope Thread] Setting filter for auto center... [08/08/19 01:39:29.776][DEBUG] [Telescope Thread] Setting filter position 5... [08/08/19 01:39:29.776][DEBUG] [Telescope Thread] Filter position 5 is already set. Skipping... [08/08/19 01:39:29.776][DEBUG] [Telescope Thread] Performing auto center step 1... [08/08/19 01:39:29.776][DEBUG] [Telescope Thread] Skipping step 1... [08/08/19 01:39:29.776][DEBUG] [Telescope Thread] Auto center reference frame solved successfully... [08/08/19 01:39:29.777][DEBUG] [Telescope Thread] Performing auto center step 3 (scope)... [08/08/19 01:39:29.777][DEBUG] [Telescope Thread] Auto center slewing scope to match reference... [08/08/19 01:39:29.782][DEBUG] [Telescope Thread] Telescope: Slewing to J2000 RA: 0 (00h00m00.00s) Dec: 0 (00°00'00.00") [08/08/19 01:39:29.782][DEBUG] [Telescope Thread] Telescope: Slew received J2000 coordinates, mount requires JNOW, converting... [08/08/19 01:39:29.783][DEBUG] [Telescope Thread] Telescope: Slewing to JNOW RA: 0.0167206435409935 Dec: 0.108967209905987 [08/08/19 01:39:29.783][DEBUG] [Telescope Thread] Telescope: Calling Observatory Slave Slew [08/08/19 01:39:29.803][DEBUG] [Telescope Thread] ASCOM Telescope: Error in Slew : stcaSiTech Says: InvalidOperation Can't SlewToCoordinatesASync below Altitude Low Limit! (System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Runtime.InteropServices.COMException: stcaSiTech Says: InvalidOperation Can't SlewToCoordinatesASync below Altitude Low Limit! --- End of inner exception stack trace --- at System.RuntimeType.InvokeDispMethod(String name, BindingFlags invokeAttr, Object target, Object[] args, Boolean[] byrefModifiers, Int32 culture, String[] namedParameters) at System.RuntimeType.InvokeMember(String name, BindingFlags bindingFlags, Binder binder, Object target, Object[] providedArgs, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParams) at System.Type.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, Object[] args, CultureInfo culture) at ASCOM.DriverAccess.MemberFactory.CallMember(Int32 memberCode, String memberName, Type[] parameterTypes, Object[] parms) in c:\ASCOM Build\Export\ASCOM.DriverAccess\MemberFactory.cs:line 443) at ASCOM.DriverAccess.MemberFactory.CallMember(Int32 memberCode, String memberName, Type[] parameterTypes, Object[] parms) in c:\ASCOM Build\Export\ASCOM.DriverAccess\MemberFactory.cs:line 483 at ASCOM.DriverAccess.Telescope.SlewToCoordinates(Double RightAscension, Double Declination) in c:\ASCOM Build\Export\ASCOM.DriverAccess\Telescope.cs:line 1030 at p7.jv(TelescopeInformation A_0, String& A_1) [08/08/19 01:39:29.803][DEBUG] [Telescope Thread] Auto center slew to reference failed (Slew failed! stcaSiTech Says: InvalidOperation Can't SlewToCoordinatesASync below Altitude Low Limit!)... [08/08/19 01:39:29.803][DEBUG] [Telescope Thread] Adding sequence level notification: Slew to reference failed. Slew failed! stcaSiTech Says: InvalidOperation Can't SlewToCoordinatesASync below Altitude Low Limit! [08/08/19 01:39:41.085][DEBUG] [Recovery Sequence Thread] Recovery: Auto center failed. Failed to slew to the reference position. [08/08/19 01:39:41.085][DEBUG] [Recovery Sequence Thread] Sequence recovery failed! [08/08/19 01:40:15.204][DEBUG] [PHD2 Listener Thread] PHD2 - No messages received from PHD2 for 1 minute, checking socket with status... [08/08/19 01:40:15.204][DEBUG] [PHD2 Listener Thread] Checking PHD2 state... [08/08/19 01:40:15.204][DEBUG] [PHD2 Listener Thread] PHD2 GetPhdStatus - Pre-Wait : Stopped [08/08/19 01:40:15.204][DEBUG] [PHD2 Listener Thread] Sending to PHD2: {"method": "get_app_state", "id": 1001}

I think it will be from where I had to chop the end of the thread off to reduce the distance, the eos adapter feels pretty solid

Right I have got my spacing fixed, think im actually under now, but it is my understanding that this is ok because I can just focus past infinity. My issue is now tilt of some variety, what do you guys think and if it is how do you fix it, this is one frame stepped down to F2.8 just starched and converted to PNG

Sadly the distance needs to be reduced. From what I can tell I have 3 options. 1. Probably most sensible save up for a new camera. 2. The thread from the eos adaptor to m48 adapter is too long there is a mm minimum that could be shaved off somehow. 3. Perhaps the most drastic remove the thread entirely and glue it directly to the front of the filter wheel.

definitely one id have to smuggle past the wife

Might work out cheaper to get a new camera, as much as a set of Astrodon filters is very tempting 😁

Thanks Adrian Ill report back. That extra 6mm ish does seem to help a lot

Thanks Mike, ill try tonight if a get a clear patch, hope it needs to go out because apart from getting new really thick filters I can shave any more distance off

Hi Mike Always had it at 12.5 but can see 13mm +- .5 so im either at 45.2 or 46.2 or somewhere in between according to the adapter sizes I am eos to m48 10mm m48 to T2 3.5mm filter wheel 19mm filter wheel to camera 0. so would not be possible. what is the tolerance at F2

Hi Adrian If the bit by you red tape upto the block is 12.5mm which Atik stake as the chip distance then yours is actually .9mm longer than mine, how thick is your filter? Im trying to use the 16mm version instead of the 135mm but should be the same. A second question looking at your equipment how do you find the ASI1600 compared to the 428?

Hi All I am trying to hook a Samyang Canon fit lens to my Atik 428. currently after a bit of use with a hacksaw I have the following focal distance. Atick chip distance 12.5mm (where is this measured from the front of the camera is rounded so I took it as the very front. I then have 32.7mm for the rest of the image train this is to the metal plate at the back of the Lens. Sot that is a total of 45.2 I have filters that are 2 mm thick so minus .6 = 44.6 is that still to far over?

Wow large increase in price.

+1 for the Mesu, its that good I cant actually remember how to set a mount up, I did it once two years ago and that's it.

It's turned up today but I can't remember the last time I saw the sky so will report back when it clears. I've got to get another timing belt for the auto focus also the lens is a lot fatter than expected

Forgot to say make sure the extension tube is long enough, I have no experience with the ED72 but on the ED80 you need to cover the distance that would usually be taken up by the correcting prism if using it visually, The flattener does this without the extension but obviously avoiding the expense of that you need to have enough outward travel on the focuser to get the camera in focus.

Cheers Alan ill find out tomorrow

Hi Alan You may know this then. Do MPB check the optics of the lenses they sell, I was reading there terms and they state fully tested I don't know if this goes as far as the optical alignment but I guess being second hand they might check

Thanks Glen I've got one coming from MPB. You ever use them I'm sure I got them recommend to me a while back

Yea if you get say this https://www.firstlightoptics.com/adapters/skywatcher-dslr-m48-ring-adapter.html But then you will need this also https://www.firstlightoptics.com/adapters/astro-essentials-2-nosepiece-to-male-m48-thread.html Basically you need the adapter to have male Canon bayonet then an extension tube to connect to that and into your focuser as you say

Hi easiest way is to get the dedicated reducer/flatner it is sold at FLO https://www.firstlightoptics.com/pro-series/skywatcher-85x-reducerflattener-for-evostar-72ed-pro.html#about_this_product This and the associated adapter will get you the correct spacing and a nice flat field also

Thanks Glen. Yea I read about off center optics etc. I have a 16mm on the way so fingers crossed

Hi All Is it necessary for a camera lense to have a ED glass element to be good for astro work with a CCD camera. Everyone knows how good the Samyang 135mm F2.0 ED is but what about this one :- https://www.samyanglensglobal.com/en/product/product-view.php?seq=311

Many thanks, just wasn't sure if it was a c mount or something like that.