Quote:There was a time I was thinking of getting a modded DSLR, one of them PC-less guiders (which I still haven't heard are that great) and head out to the wilds with a smaller battery and a solar charger, and voila: the ultimate survivalist rig.Paul
My gear: --Celestron 8EdgeHD & 11EdgeHD | 80mm F/6 Triplet | Modified Canon T1i | QSI683WSG-8 | QHY5L-II | Celestron AVX mount | iOptron CEM60 mount | iOptron ZEQ25 mount --- My skies:
10Micron GM2000HPS, 10Micron GM1000HPS, SW NEQ6 Takahashi FSQ106 EDX III, SW 190MN, TS Riccardi 130 f/5.2 SBIT ST-8300M, QSI 683wsg8 SX Wheel, Baader 2" filters, Baader 36mm filters, Astrodon QSI filters http://astro.frejvall.se
Quote:Starhawk, I am sorry, but I do not get the message here. Could you please elaborate. In what way is the 10Micron controller "mount aware"? What is with the "won't survive a power outage"? "Driving into the pier"???You lost me.../per
I lost count of my scopes. Now I just want mobility. I came, I saw, I bought some interesting accessories, and put names to faces: NEAF 2012, ASAE 2012, SWAP 2013, ASAE 2013.
6" Baby PowerNewt ES 152mm Achro iOptron iEQ30 QHY12 Lodestar & 50mm Borg guidescope Luck
8" GSO RC with CSL Moonlite FocuserTelevue TV60isLosmandy G11 with Gemini 2 (with Ovision upgrade)
SBIG STT-8300m with Self Guiding filter wheel
A wide assortment of lenses for my Canon.
Quote:However, most people taking astro photos use CCD cameras.
That is simply not true!
Quote:However, most people taking astro photos use CCD cameras.
DSLR & Digital Camera Astro imaging: 28040 258584
CCD Imaging and Processing: 26306 248056
Quote:Hi Tonk.Are you saying here that the 2000 needs Per's modeling software to perform.Or will an accurate say 3+5 alignment and accurare polar alignment done thru the hand controller suffice for 10 mins unguided with really accurate goto's.Am considering the 2000 btw to replace my CGE PRO sometime this year.But as i do not use a computer nor want to bother with maxim dl and model building all this talk of Per's software has me worried how the 2000 performs out of its box so to speak.
Ed Thomas Deep Space Products www.deepspaceproducts.com
Quote:But as i do not use a computer nor want to bother with maxim dl and model building all this talk of Per's software has me worried how the 2000 performs out of its box so to speak.
Quote: In general, it is recommended to get at least 20-25 alignment stars to start unguided imaging. Gotos are highly accurate with only a few stars, but for dual axis tracking and correction, the larger model is better.
ASA DDM60 Pro, Officina Stellare Veloce RH200, Canon FD 300mm F/2.8, SBIG STF-8300M http://www.flickr.com/photos/67018317@N07/
Quote:I have a permanent setup and am using a 120 point model for the unguided imaging. I also add a 5-10 point local model on top of that sometime when the target is located in low alt position.
Tom Polakis Tempe, AZ Visual observing, DSLR photography, lunar & planetary imaging http://www.pbase.com/polakis/
Quote: Even if you have perfect polar alignment and the mount can eliminate periodic error, how do these closed-loop mounts deal with refraction? Thanks.
Quote:Can anyone explain the firmware and software updating process for the 2000 HPS.The 10 micron forum will not let me onto the firmware thread.
Are the 5 to 10 points for low altitude modeled to deal with refraction? One thing that has bugged me about the concept of unguided imaging is that refraction is significant for large-scale imaging at moderately high altitudes, like 30 degrees. Even if you have perfect polar alignment and the mount can eliminate periodic error, how do these closed-loop mounts deal with refraction? Thanks.
Quote:Playing with barometric readings, altitudes etc. is waste of time and not very accurate IMO.
Quote:As for refraction or not, I beg to disagree, GIR. Refraction is a well researched subject with a very reliable formula taking the temperature and ambient pressure as inputs. Science and research have determined that it is the pressure and temperature at the actual site that matters most.10Micron handles the refraction calculations in-mount. This means that when you build a model (in any way you want), the refraction parameters need to be correct. Prior to entering the synced coordinates into the model, the mount firmware will nullify the refraction so that the refraction at the time of actual use of the model can be applied. Therefore it is imperative to have the correct parameters.Should one choose the plate solve "force" method for low altitudes, the net result would be poor tracking when refraction does change to something other than what was present at the time of model building. I am quite sure that ASA also nullifies refraction prior to entering it in the model.
Quote:I do agree with Gir that a part from direct drive technothe local tracking thing is a real value for ASA mount, thanks to Mr Keller
Quote:Sometime in winter they are temperature inversion between hign and low altitude for example , so the refarction parameters seems a bit too simple regarding reality...
Quote:If you really think that making the refraction calculation based on some formula and manually inputted parameters on e.g. temperature and ambient pressure …and trying constantly updating those parameters, is a good way to go, we really do disagree completely.
Quote:…and trying constantly updating those parameters
Quote:Well if you don't have to .... we don't have to. So why are you raising this unlikely scenario?????
Quote:Time, then...We all know that 1 second off in time yields an error in Ra of about 15", which is a lot when we expect sub 5" RMS performance. A GPS communicates at 4800 bps, normally with one start bit and one stop bit. Net performance is thus 480 characters per second, or 2.1 ms per character. Below is the spec from IEC 61162-1 specifying the NMEA 0183 protocol, and more specifically the sentence used to send the GPS time (the shortest one, not necessarily the one your GPS uses). For your GPS it would be like this:$GPGLL,5916.25,N,01818.18,E,192831.22,A,D*3FThat constitutes 46 characters (including line endings) and takes 96 milliseconds to transfer to your computer. Before that, the GPS has to calculate the position fix with its hardware maths thingy (correlators), assemble the sentence and get it out the door, adding a few milliseconds to the game. Then your computer has to set the clock, a fast process, but nonetheless. In the end, you are at least 1.5" away at that time, most likely much more. Add to that the fact that the time is only specified with 10 ms of precision...Using a good NTP client (Meinberg is good) via the internet can get your PC clock running at sub millisecond precision, so that is a lot better. Other factors that may or may not drown the errors here have to do with sidereal time of the plate solve. I haven't researched that yet Given this time trouble, I wrote my time setting software so that it waits for a 2 ms slot at an even second, then sends it to the mount and records that time. When the mount responds to the time set request, it is reasonable to assume that the TCP/IP communication is negligible and that the time of response arrival closely matches when the mount set the time. The software reports this and you can reissue the command until you are satisfied with the precision. I usually settle for 30 ms or so. Of course, this is much better handled in ASA's software as it runs entirely in the PC and doesn't have to communicate the time to the mount.
Quote:Firmware is updated, as Ed correctly states, with an Updater application that is installed on your computer. It has the firmware embedded, so there are no separate firmware files. You install the updater of the version you want and simply run itConnection can be anything; wired RS232, wired Ethernet or WLAN (if you have the WLAN option).The updater application is also used to add/remove/edit data in the comet and satellite databases in the mount. Once you have transferred your TLE files with the orbital parameters, they are stored within the mount (actually box) and are available without a computer.Per ...where do i find the updater application to install on my computer?
Quote:Per,If you really think that making the refraction calculation based on some formula and manually inputted parameters on e.g. temperature and ambient pressure …and trying constantly updating those parameters, is a good way to go, we really do disagree completely.
Quote:The mount calculates. You send it the data, just as in autoslew where you input it into dialog boxes...
http://www.astrobin.com/users/orion69/ TS 150 mm APO Triplet, Feather Touch 3.5" focuser, Micro Touch Focusing System CGEM on custom made platform Atik 383L+ mono, Atik filter wheel, Baader LRGBC + narrowband filters SX Lodestar + TSOAG9 Dew-Not heater
Quote:There is one question that comes to me reading all this posts about numerous variables that has to be addressed for mount to be able to do unguided imaging, why not just install OAG and everything is solved with one stroke?