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Brisbane Astronomical Society
เข้าร่วมเมื่อ 5 ต.ค. 2017
Stellarium Tutorial On Deep-Sky Star-Hopping
This video aims to help telescope beginners go beyond just the bright Moon and planets and find much fainter deep-sky objects such as globular clusters, open star clusters, nebulae, and galaxies. The video is particularly designed to assist astronomers using simple non-tracking Dobsonian telescopes. This video will show you how to us a planetarium app called Stellarium to pick suitable objects to observe. The video then show you the star-hopping method to navigate your telescope to your target object.
มุมมอง: 111
วีดีโอ
Light Pollution Go Beyond the City
มุมมอง 1443 หลายเดือนก่อน
This video outlines the concept of Apparent Magnitude of astronomical objects and the effect urban light pollution has on the ability to find and observe deep-sky objects in a telescope. The key recommendation arising from this video is for astronomers to take their telescopes to dark rural locations well away from the light pollution bubble of cities and towns.
Dobsonian Telescope for Beginners
มุมมอง 895ปีที่แล้ว
An introduction to the Dobsonian telescope for beginners. How to set-up your scope, align the finderscope and find objects to observe.
Save the Maleny Sky from Light Pollution
มุมมอง 2022 ปีที่แล้ว
Residents of Maleny have launched an e-petition to highlight the issue of worsening light pollution on the Sunshine Coast in general, and Maleny in particular. This has implications for residents of the region, both human and wildlife. Poor streetlighting designs and installations by the Sunshine Coast Council and Energex are exacerbating the extent and severity of light pollution in the region...
Confirm and Finalise BAS Equipment Rentals in Viberent
มุมมอง 372 ปีที่แล้ว
This is an internal tutorial video for Brisbane Astronomical Society Management Committee. It explains the second stage of the process for managing equipment rentals using Viberent. In particular, it looks at how to convert a tentative quote into a confirmed rental. It also explains how to finalise the rental in Viberent once the equipment has been returned.
Step-by-step tutorial on using the Vibrerent system to manage rental of astronomy equipment
มุมมอง 462 ปีที่แล้ว
Step-by-step tutorial on using the Vibrerent system to manage and record the rental of astronomy equipment to BAS members
BAS Equipment Rental Transaction Process Outline
มุมมอง 332 ปีที่แล้ว
This video is an internal tutorial for BAS Management Committee. It outlines the basic process by which astronomy equipment will be rented to BAS members.
Simple Setting Circles for Dobsonian Telescope
มุมมอง 7K2 ปีที่แล้ว
A quick way to achieve a setting circles function on a Dobsonian telescope - to find objects quickly. Admittedly this is not the most accurate method, but it’s simple, quick, cheap and works reasonably well.
Dobsonian/Newtonian Telescope Secondary Mirror Major Misalignment Check
มุมมอง 14K2 ปีที่แล้ว
Check if the secondary mirror on a Dobsonian telescope is badly misaligned with the eyepiece holder.
Push-to Dobsonian Telescope with Argo Navis connection to SkySafari Planetarium via Bluetooth
มุมมอง 2.3K3 ปีที่แล้ว
The Argo Navis DSC is an excellent accessory for push-to Dobsonian telescopes. It allows the scope to be quickly and accurately pushed to thousands of objects in the Argo Navis database. However, you are pretty much limited to objects in the NGC and IC catalogs. The SkySafari planetarium app, however, displays countless additional objects, including distant galaxies, asteroids and recently disc...
Finding Deep Sky Objects with SkySafari
มุมมอง 13K5 ปีที่แล้ว
Using SkySafari to find more deep-sky objects by making sure your telescope is pointing exactly to the spot where your target object is located.
Star Adventurer - Southern Hemisphere - Quick Polar Alignment
มุมมอง 14K6 ปีที่แล้ว
With the aid of a simple home-made tiltmeter you can achieve reasonably accurate polar alignment even in daylight. But this process vastly simplifies finding Sigma Octans in the polar scope and makes accurate polar alignment very quick and simple once Sigma Octans becomes visible in the evening sky. Since posting this video I have found some great smartphone apps that can make this daytime "ali...
Brisbane Astro Society - Public Telescope Evening - Mt Coot-tha July 29
มุมมอง 3546 ปีที่แล้ว
One of many public teleswcope evenings conducted by the Brisbane Astronomical Society at the Mt Coot-tha Lookout.
Astrophotography with the Canon G5X Camera
มุมมอง 27K6 ปีที่แล้ว
An introduction to automated and manual mode astrophotography with the Canon PowerShot G5X camera. The link to Canon Digital Photo Professional mentioned in the video has broken, so here is the URL: cpn.canon-europe.com/content/news/digital_photo_professional_software_update.do
Star Adventurer - Southern Hemisphere Polar Alignment Procedure
มุมมอง 34K6 ปีที่แล้ว
Learn how to align the Star ASdventurer with the South Celestial Pole to allow log-exposure astro-photography. Here is a link to a printable PDF alignment guide you can take with you: bas.asn.au/wp-content/uploads/Polar-Alignment-of-the-StarAdventurer-Tracking-Mount.pdf
Thank you, very helpful video
Great instructions. Thanks 😁
0:41 mine is skewed. It should be a little bit more „right“. What’s the solution? Can’t get it right with the 3 adjustment screws alone
All I can see is the cross in my 127eq
Thank you
People just dont notice or care,these new white street lights are ldangerous,lwppe need to gather lal community and get on one of thelsle platformls
So good to just honour the basic skills and the good old common sense!
nice idea, but this requires that your focuser is absolutely perfectly squared
Collimation of your scope's mirrors also requires the focuser to be perfectly square to the secondary mirror. That is why the secondary mirror has multiple degrees of freedom to be adjusted. The insertion of the plastic tube just provides a way of alerting you to the fact that your secondary mirror may not be square to the focuser. You could perhaps start moving the secondary toward true square alignment with the plastic tube inserted, and then remove the tube and finalise using a laser collimator.
... ... .... 👁️ 🧐🔭
Nice demo thanks how you calculate exposure is it done automatically or you have to set it while selecting the mode?
If I shoot in the Scene/Star mode the camera sets the exposure length. If I shoot in M manual or B Bulb is just experiment with the exposure length to find what looks best.
Very nice, but for closed Newtonian tubes you can only view from the top and the secondary mirrored surface is not visible.
Hi Phil, I don't think you need to be able to see the reflective surface of the secondary mirror to check its alignment. From the front of the optical tube, you should be able to see if there is a consistent gap between the edge of the mirror and the PVC tube. That’s all this test is about. Is the secondary mirror "square " with the focuser axis?
Great tutorial ! My G5X must have different firmware, as the only way I can get into the star mode is by using the touch screen, the control dial does not give the option.
This is as good an explanation I have seen for the Southern Hemisphere. Thanks for sharing your time to present this method. Greetings from Tasmania-Southern Cross Observatory-42 South.
I've never seen this done before - Top tip! I would say to the newb watching this to be very careful to not touch the secondary with that pipe.
Haha
Great ideas.Sometimes old school full analogue solutions work best.I have compass and clinometer on my (smart?) phone but if I put it near metal or electronic devices the readings get messed up,making it useless.This is the perfect solution.
Very helpful thanks
Brilliant!
THANKYOU...
I saw another guy on YT talk about using the angle finder, I use a electric goniometer with a magnetic base. I don't have a Dobsonian , but an AltAz without setting circles, but I have Polaris to zero off and a compass with a compensator for true north versus magnetic north.
Question how do you factory reset the canon PowerShot g5x.i can't FIGUER out how to do it I have settings all different when it comes down to the settings
They made the illuminator "illegal" in Australia because of the button batteries, when I bought my Star Adventurer 2 recently they had to confiscate it. It makes using the polar alignment viewport almost impossible at night.
Here in Brisbane, button batteries are readily available at the supermarkets. Your experience is very surprising.
@@peterallison57 I'm in Brisbane, it's a federal law, something about providing them without safety instructions. I spoke with Sky-Watcher and they confirmed it's the case. They're working on a fix so they can send out illuminators to people who purchased their products but had the illuminator removed. It's frustrating but at least they're working to fix it. In the mean time I'm learning about aligning in the blind with various techniques, which is honestly worth doing anyway because Octans is hardly visible in most places.
I live in the NH and this is still useful. Thanks!
Great tutorial. Roughly how long could the Star Adventurer accurately track for? Would it be realistic to get anywhere near 40 or 50 minutes? I guess it would be quite ambitious to have that kind of exposure time with a camera with a standard lens (50mm on full frame) and no star trailing? By the way, I would be shooting on film so there wouldn't be a build of noise during a 40 - 50 minute exposure time.
The wider then lens, the longer you can expose for and not have tracking errors displayed in the image. I've done 12minutes with a 14mm lens on an APS-C sensor. But I think films suffers from film reciprocity failure for long exposures. This causes colours to go a bit strange. But I'm not sure if it is a problem with low-light astrophotography. Google might know. Also, achieving sharp star focus with a film camera is difficult. Digital is much easier. Good luck with your astrophotography.
@@peterallison57 Yes indeed. I know that wider lenses are more generous and allow for longer exposures with less tracking errors. I have got decently long exposure times on M4/3 with a 12mm lens without a star tracker. One thing that puts me off digital astro though is that after stacking, there is an incredibly long and drawn out post production process that I found overwhelming. Whereas with film, I like that you have a single image which is pretty much 'complete' after the film is developed. And yes, reciprocity failure could be an issue. There is someone who managed to get 45 minute long exposures with a 35mm SLR and a 600mm lens but I suspect that the tracking mount he used probably cost a fortune.
Clear and to the point. So many of these things just go on and on and on... Thanks.
Thanks for putting this together. I was not understanding how to do this until watching this
thanks mate! would the procedure be same for the new SA GTI version ?
Sorry I can't be definitive, as I'm not familiar with the new model. But my guess is, yes.
Is it necessary to align the setting circle to true south/north or can you just find a known star or even planet and just move the setting circle to that azimuth degree? I really like this design and seems a lot more simple than taking the base apart 👏🏻
Hi LoLo, I just aim the telescope at a known star, find the it's azimuth compass reading on a planetarium app and then place a marker on the ground below that reading on the plastic tube. That marker is then the reference point for all other azimuth directions. Just slew the scope and the tube moves with the scope to the required next azimuth. As I say in the video, this method is not particularly accurate, but it gets you close enough.
Ripper of a solution! Thanks! Clear skies!
Very informative video. Thanks for sharing.
Nice vid but too much limbo action needed. Sharpcap Pro ftw.
Great method of daylight polar alignment. Just not quite clear on the protractor reading. (silly me.) I note that your latitude is 27.5 degrees. Though the indicator needle is positioned about 61 degrees (reading the inner scale) at 3:56. Unless I'm interpreting this wrong?
Hi Anzaeria. You are right, my latitude is 27.5 degrees. So, the South Celestial Pole is 27.5 degrees above the southern horizon at my location. At around the 1:36 point of the video you will see the verticle needle is roughly 27.5 degrees from the 90 degree mark of the protractor. Just ignore the actual numerals on the protractor. What you need to achieve is a tilt of the StarAdventurer polar axis above the horizon that matches you local latitude. You will see some red arrows and text on the video at about this point that indcates the required 27.5 degrees above horizontal tilt for my locaton. Actually, since I created this video there are now some better Apps available for download to smartphones. There is an excellent inclinometer app called Velux Roof Pitch that is really good for adjuusting the altitude angle of the StarAdventurer to match you local latitude. Also, there are plenty of smartphone Compass Apps that have a True North option (and not the Magnetic North option). Just select True North or South and use that to aim the StarAdventurer to the true south of the celestial pole. Using these two Apps you can get Sigma Octans into the polar scope field of view very easily.
@@peterallison57 Thank you for the detailed reply. That makes perfect sense. Apparently, the latitude of my location is 35.7 on Kangaroo Island, South Australia. There are some very clear, dark skies over here with very minimal light pollution. Actually 0 light pollution in some spots. Though I admit I don't have a star tracker as yet (Ive been doing astro shooting from a fixed tripod.) Out of curiosity, does the Velux Roof Pitch app have a virtual needle?
Neat! I used a lazy susan ring and printed the marings on it, and used a cheap digital inclinometer
Thank you for the common sense logical solution
Have you tried this: th-cam.com/video/AtArqBLWWJ8/w-d-xo.html way simpler
thanks so much! very helpful.
Very cool. I’ll be sure to remember this trick later down the road.
I’ve been looking for a good way to do this, saw the other clips with the print out compass sheets. But this method is the one I’ll do. Thank you for going to the trouble of sharing fellow Aussie. Off to Bunnings soon 😁 Cheers 🍻
Oooh - hands on "do this" training - I love it! Thank you for sharing this.
Had a go with mine tonight and failed miserably to find the stars. I think next time I'll have a better chance having watched this.
awesome lesson, thanks!
excellent, thanks!
Thanks for a very good video This process requires star visibility when pointing South, right? Let say there is an object blocking the polar alignment visibility ie mountain, Building etc. How much accuracy? For example , Wide angle lens with 2 mins exposure ,,Is this possible? Thanks
Excellent explanation! Thanks
Very clear explanations - thanks
legend mate good vid
That was an awesome video. Just got a star adventurer and there are not really any great instructions in how to do the polar aligning here in the Southern Hemisphere. After watching this I feel comfortable enough to go out and use my start adventure on the next clear night.
I had forgotten to allow for the 19 degree magnetic dec. thanks!
The best instruction for the Southern Hemisphere I have watched, thank you.
4.40 can be fiddly? I’d suggest it’s INCREDIBLY fiddly unless you have at least an intermediate knowledge of Astronomy. Thanks anyway.
I have recently bought a SA 2i Pro Kit. When attempting to align the scope it doesn't fit all 4 stars accurately with either Octans T or X not in their circles. No surprise I'm having trouble getting aligned. Is it possible the scope is not correct or am I missing something else? Thanks in advance :)