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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.
I am sure there are loads of these polls but there seems so many available now I was wondering what, and why, people are using them.
Poll is set to close end of August so it doesn't go on running forever.
Thanks for participating
Hi guys! 🙂
My name is Andrew, I only just stumbled across these forums just now! Couldn’t have come across a better community to help me with some questions I have!
So I’ve Come to the conclusion that I’m going to be buying a Celestron Nexstar 6SE telescope everything about it appeals to me. I currently own a much older manual celestron telescope and am ready for my first proper telescope!
I do plenty of photography and own a DSLR and am aware that with this telescope that it comes with a software that will record video of what you’re gazing at and stack the images if I’m correct?
because I’m familiar with normal photography and not so much with Astro photography I was wondering if anyone could help me out. For the stocking software, is that all the process completed within the telescope and no DSLR? Or is that recorded with the DSL are and then the software stacks? What kind of adapters would I need to be getting into AP? By the way I’m looking at mainly photographing the moon and hopefully get some awesome shots of the other planets too! 😄 not so much deep AP, as from my research I’ve gathered that this isn’t the greatest for it... anyways.
Is it better to use a DSLR and an adapter on the eyepiece for imaging? Or the stacking and what would I need for best result stacking images, especially of planets like Saturn and Jupiter?! Are the individual eyepiece attachments you buy for the telescope, cameras in themselves? What is aci? I’ve got no clue! Haha a lot to learn!
I thought I was on the right track looking by myself for equipment and I came across the 10MP celestron Neximage eyepiece or whatever it is? I’m not entirely sure? And also what is a T ring? Is that a Dslr adapter? Does the stacking software come with the telescope or with additional purchases?!
Sorry for the bombardment of questions! Obviously I’m very excited to get going and am very keen on getting some equipment! Any answers are much appreciated!
Have a great day!
So on Tuesday night I spent the evening imaging the moon with my Celestron 9.25 SCT and DSLR as shown below and am happy with the images I collated (I only took images as I did intend to take capture video but I got carried away and time was getting on).
I have approx 350 jpeg (and the equivalent in raw) images and have used the Microsoft image composite editor to stitch the frames together without editing them first etc but I wonder if I'm going the images an injustice?
I'm not ready to pay for editing software as I know there is a lot of very good free downloads out there and I'm asking for recommendations. Should I be processing the frames before/after stitching and what software would you recommend? Please offer any advice you have.
I will post the resulting image once I'm happy with the outcome 😁
Thanks in advance,
I am a proud member of a team working on a multi-platform live stacking solution : ALS (Astro Live Stacker => https://als-app.org)
It runs fine on PC (GNU/Linux and Windows 7 to 10), OSX and RaspBerry.
Current stable version is very basic : Polling a folder to detect new images (any FITS or DSLR RAW) then align + stack (Mean or Sum) + autostrech + levels + RGB balance.
ALS also has a built-in webserver so your pals at the astroclub can see the results, provided everyone is on the same network.
We are working hard on new features like Dark subtraction + Hot pixel removal and are providing nightly builds for you guys to try it out. Check out https://als-app.org/nightlies/
Handling image capture directly inside ALS using INDI protocol is on our roadmap too. check out our Github repo to know more about it
If you could give it a try and help us make ALS a fun & easy way to see and share all those wonders above our heads, that would be much appreciated !
Clear skies to all !