Видео

How much of a gap do you have between the slats with the composite decking? If you give it a good wide gap (we like to do that so there's a good amount of air flow inside the dome) they don't buckle when they expand. We recommend composite decking.

If you're using the Baader MPCC-III, you need to figure out the back focus. It's 57.5mm if you remove the 42mm insert and the stop thread. If you leave the 42mm insert in, the back focus is 55mm. The QHY163 is a four-thirds sensor (same as my elderly ASI1600) so there's no problems about leaving the 42mm insert in place, it probably won't cause vignetting.

You're absolutely correct - I had to check the client's order and yes, it's the CFW3L. I've changed the text description. Nice pickup!

I normally have more cameras set up on the desk to see stuff close up. I did have one from the other side but the battery gave out. You work with what you're given.

Well, I've been in and out of that door so many times now. It's meant as a remote dome that you don't normally enter, but if you're a really beefy astronomer you might have trouble.

Actually I use the previous FocusCube (I think I said that in the video) and find Unity quite workable. I've used it on a Nyx and my Powerbox Advanced as well. I don't spend much time in the Unity software as I run most of the gear through Voyager and it's seamless.

If you want a more detailed video of us actually building a 3 metre ScopeDome, see our earlier one at ruclips.net/video/Ps8qEP_pWzY/видео.html. This video is more about Mike and the overall project.

Well, sold out!

Targeted at people who have money, and buy. They sell lots of these units

people buy single OTA's for twice, thrice, sometimes even quadruple that amount. Add a mount to carry an OTA in that price class and youre easily exceeding 100k. If you have that kinda money, youll have another 25k for a dome.

The accuracy of tracking depends on a lot of things, including the quality of your polar alignment as well as the weight being lifted compared to the weight rating of the mount. On its own the 8" SCT would not be a problem in terms of weight. However, harmonic mounts appear to be susceptible to periodic error. I would suggest using an autoguider.

Yes, the ASIair uses the Unity interface (which is an ASCOM front-end). It's fully functional.

@@siderealtrading2415 I haven't seen many reviews of that combination. Even in the forums there is not many people who have tried it successfully. Also, do you think this mount is more precise than the AM5 for long focal lengths?

If it's not charging, then you'd start by checking the power supply, including fuses.

@@siderealtrading2415 lol I just couldn’t figure out which side of the button was on and which is off, mount works wonders, perfect guiding almost every night🙂

The 3-meter ScopeDome is 3 meters in diameter (3019 mm to be exact) at its widest point. However, because the dome extends outwards from its base, this widest point is at about waist high when you stand next to it. The base ring (which is what is being installed at 5:04 ) has a diameter of 2232 mm on the inside and 2752 mm on the outside. There are diagrams at www.scopedome.com/wp-content/uploads/2020/10/ScopeDome_Manual_3_0_EN.pdf.

The 3-metre ScopeDome is 3 metres in diameter (3019 mm to be exact) at its widest point. However, because the dome extends outwards from its base, this widest point is at about waist high when you stand next to it. The base ring (which is what is being installed at 5:04) has a diameter of 2232 mm on the inside and 2752 mm on the outside. There are diagrams at www.scopedome.com/wp-content/uploads/2020/10/ScopeDome_Manual_3_0_EN.pdf.

It's true that you can't disengage the drive, and so you can only roughly balance the RA roughly. However, because the harmonic drives produce so much torque, this is not a problem. So rather than perfectly balancing the RA, the task is more to lessen the out-of-balanceness (if that's a word) of the mount.

Ha ha!

Pegasus does not provide PE graphs with their mounts, but we do know that PE varies greatly, and the curves can be very busy and lumpy. You're right that PPEC is largely useless with harmonic mounts, but PHD is very useful for guiding out all the chaos to give quite a good guided performance, so I think that PE becomes a non-issue with autoguiding. As I pointed out in the video, getting a harmonic mount to match your scope is a good overall strategy. For this reason the AM5 would be better for a small refractor (or the AM3 if you just have a camera and lens) because that makes a portable rig. The NYX is better suited to heavier scopes, where the AM5 wouldn't guide as well. Of course, for any scope, I think the NYX would provide better performance simply because it is less stressed, but individual mounts will always vary. If you get into seriously large scopes, a harmonic mount doesn't really make sense because you're trying to match a portable mount to a non-portable scope.

@@siderealtrading2415 ​ Thanks for your insight and I also think you're spot on with your general concept of how these types of mounts should be used.. They're portable mounts, don't put a large scope on them. People look at the theoretical payload of those small mounts and the pictures on the homepage and think "I can put a C11 on that AM5 (because ZWO actually shows a picture of this on their AM5 homepage)", and while the mount itself may be able to hold it, accuracy will greatly suffer at such a focal length. It just makes me wonder, why ZWO shows these pictures with the C11 while at the same time saying the AM5 is meant for scopes with focal length up to 900mm? (Yes, i know, the answer is "sales" ;)) Back to the NYX. Are you aware of what Pegasus recommends as longest focal length to be used? In regards to PHD and guiding, harmonic drives highly benefit from very short corrections in guiding. Preferably multiple sub-second corrections, however to my understanding PHD can do only one guiding impulse per image, so it's highly recommended to keep exposure times at 0.5" (if seeing permits of course, but that's where multi-star guiding can help). What really seems to help is also to really reduce the max RA and max DEC pulse durations, however for understanding the best values for each specific mount, it would greatly help to know the steepest slope of the periodic error. That's where such graphs would have come in handy.

Yes, it does both, and you tell the app which mode it is in when you launch. Like I did in the video, I would recommend Sky Safari as a visual rig pointing app, but you can use the Pegasus Unity Mobile app as well.

@@siderealtrading2415 Thanks for the amazingly quick reply. Have gone back and watched many of your earlier videos, and appreciate the content. Cheers!

@@stevenv9726 I don't pretend to be a great presenter!

The one you see in the video is currently for sale and immediate delivery. Where are you located?

@@siderealtrading2415 Dude, i want a new one , not a demo one

The torque it produces is very high - I don't think I'd like to get my hand caught between the scope and a tripod leg.

For 25k Australian dollars? Link me please

Where can you get a cheap clamshell? 😂

Cheap? No one said you could get one cheap.. cheapER than that ! No observatory is cheap lol

@@compubyte2010 which clamshell is cheaper than this obsy?

Please share which clamshell you are referring to. I would love to acquire one

You want a bet? A drop bear talon would penetrate that fibreglass in a second. Then you become the soft filling in a crunchy chocolate.

That was the sound of me crawling out the door and underneath the camera tripod without bumping it. Eva filmed me getting out and put it at the end of the video.

I'd like to know what happened next! you can't stop the story halfway like that?

How much?

Please look up the price on their website. It's not my place to try to sell or dissuade anyone from their well built products. I have had nothing but great service from Sidereal Trading in the past. I live in Canada. For those that can afford this product it will be great. It is in my personal opinion out of reach of the average back yard astronomer. I was hoping that it was in a competitive price range with NexDome which needs to be assembled.

@@ryanmichaelhaley23.999AUD

@@ryanmichaelhaley 24k. I hope shipping is included and free, because if it isnt then add another 3.5-5k to that.