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I have just got myself a Celestron C11-A XLT (CG-5) scope and a SkyWatcher EQ6-R PRO SynScan mount. I have an ASIAIR PRO and the ZWO ASI462MC planetary camera. I want to use my Nikon DSLR for deep sky photography.
Now I’m looking at auto guide options. I’m thinking of getting a ZWO ASI290MM mini and am wondering if I should get a guidescope or an OAG? Which is better and why?
I don’t have the Edge HD C11 so would the view on my scope be good enough for an OAG? If I go for a guidescope what would I need there? I’ve seen 50mm and 60mm scopes but some people have mounted huge guidescopes which would be way out of my budget. Would a smaller guide scope be up to the job?
Any advice would be greatly appreciated.
I'm selling my brand new-never used QHYCFW2M-US filter wheel for 8x1.25" mounted filters.
It will be shipped in its original packaging (with extra packing of course) with all the components that came with it included (cables, adapters, screws, etc).
If you have any question/s please ask.
Price: 250£ + shipping-fees
Thanks for looking!
Hi All, wondered if you could help me make sense of this ... new HEQ5 - belt modded by FLO, all feels good, minuscule backlash but strange guiding.
Admittedly first time using it but baffled.
Failed calibration see image below and guiding seemed to be Ra and Dec following each other.
Stars look ok ish (@ 1500 mm )
Needle galaxy is poor as only about 10 mins each in RGB
note - it was hazy and did keep losing star in OAG
Thanks for looking
I recently scored a great deal on facebook marketplace and bought Skywatcher Skymax 180 mm Maksutov-Cassegrain Telescope (f/15) with EQ6R-pro mount. I understand that long focal length telescopes are more suitable for planetary imaging. However, as I am tight on budget, I would like to use the same scope for deep-sky astrophotography. I have Canon Rebel T5 DSLR camera that I am using for taking images. Without autoguiding and a decent polar alignment, I can get ~30 seconds long shots without any star trailing, but that's not sufficient for imaging objects like M51. I would like to be able to integrate longer, say few minutes, thus would like to purchase an autoguider. Here are some specific questions I have.
1). The telescope comes with an 8 x 50 straight-through finder. If I were to use it as a guidescope, what type of image integration time can I expect? Has anyone done autoguiding for f/15 scope with an 8x50 or other finderscopes?
2). If the integration time will be an issue with the 8x50 finder scope, I am open to purchasing an off-axis-guider. However, considering the narrow field-of-view of Mak-180 telescope, I am concerned about not having enough photons from guidestar for autoguiding. For instance, with my DSLR camera, I need to integrate 20-30 seconds to see the nearby stars in M51. What type of OAG and camera would I need to autoguide with my scope? Are there affordable cameras (~$200) that would do the job for me? Would ASI120MM Mini Monochrome (~$150) do the job? What about OAG?
I plan to use phd2 software for autoguiding rather than relying on the build-in guide port on the mount. Instead of integrating for hours, I am planning to do DSS stacking of few mintues long multiple shots, hopefully this will put less strict requirements on the autoguider.
In case this information is relevant: with my current setup, I have no issue pointing my scope to a desired deep-sky object, track the object within the field-of-view of my DSLR camera for hours using the mechnical tracking of the EQ6 mount. For instance following is a single raw image of Ring nebula taken with 30 seconds shot. But it is not enough for generating high-quality images.
Thank you in advance for your help.
By Alex the great
Hello everybody on this community, very happy I recently joined stargazers lounge.com
Last November I was able to modify my EQ5 mount via shoestring astronomy GPUSB (ST4 mount-USB laptop, my guiding camera is connected to the laptop by USB and PHD2 as guiding software) so I can autoguide it for long periods 6 minutes and more, I was really happy that this project was achieved and now I can get more details out of deep sky objects.
My question is how can I go GOTO with this set up, trying to find objects to image is really time demanding without GOTO, and my goal is to take advantage of time to get those photons.
I installed already ASCOM but I didn't connect with the USB connection (I think only work with serials cable)
Thanks in advance for your valuable comments