Bukko

Hi all,

My son livesin central Reading and has decided to start imaging again after a few years away.

Now, I think I am probably asking if anyone has seen a Unicorn near Reading, but would be interested if anyone knows of a safe, dark site within a reasonable drive, where he can get back into the hobby.

Many thanks.

Gordon.

On 11/10/2019 at 19:42, Benjam said:

Thank you, unfortunately the weathers currently being really lousy since I completed the dome, totally different story while working on the dome... 

 

Ben 

This is a common problem - as soon as you have finished, all the ideal weather disappears and clouds and rain takes over....

Hi Ola,

Tricky situation...

I agree with the previous post; download Stellarium, set it up for your position and have a look at what's available and when. There are lots of winter objects that should be available to you, especially if you plan carefully. It would help to work out the angles from your proposed placement to the obstructions (trees and things) and make sure the most interesting objects clear the obstructions.

Good luck.

Gordon.

2 minutes ago, Gina said:

Yes, alright for observing where you're in there anyway and can push the dome round.  I'm an imager so see things from that POV I'm afraid...

This is for imaging of course. I do have an 8" Dob and a Frac on a HEQ5 for visual. When I get time, I am gonig to fit some paving slabs into the gravel area for placing a tripod and for the Dob...

Gordon

All jobs are easier when you have a helper !!

Good luck with the pier.

Gordon.

4 hours ago, Gina said:

Yes, a dome has to be automated whereas a ROR is optional.

Without the motors, I could open the shutter by hand and rotate the dome with a single finger.. So with a 1m apeture, every 30 minutes or so, I would just need to push the dome round a bit so it would be possible to use this without the automation. But also  I could not disappear in the warmth and work from there...

To be honest, I didn't even consider this option for a single second...

Gordon.

6 hours ago, DaveS said:

I did very seriously consider a dome, and looked at the Pulsar and Scopedome (At one point I had a design of a Pulsar dome on a "shed"), but decided that the added cost of dome automation made it just too much. There is a Baader clamshell design, but it's of the "If you have to ask how much..." persuasion.

Agree on the automation. I really struggle to understand why it is all so expensive; the one bit that got me with the Scopedome was the price of the pre-made wiring looms. I did think about doing my own, but having bit the bullet and shelled out for them, there is a LOT of interconnections and I was pleased not to have skipped them.

Specialist fitting contractors are also expensive but apart from me taking a lot longer to build and comission, I saved thousands.

And I did look at the Baader clamshell (other clamshell manufacturers are available) and searched hard to find a price without making an official enquiry. There was one posted and it is seriously expensive. But I have no doubt is is really good. If I lived in the artic, or the top of a mountain in Switzerland, it would probably be the one to go for. But I don't.

If you have a decent base already, if/when more funds become available, you can always "upgrade" later. (oh.. ROR owners, please don't hate me for that... I did put it in " " afterall..😉😉

Gordon

1 hour ago, Rusted said:

Seriously? You are very welcome.  It just seemed so perfectly apt for your observatory. 

I think the shape of your Scopedomes makes more sense for a reflector than the Pulsar.
While the Pulsar seems more suitable for refractors on tall piers.
Without knowing the price differential I'd say the Scopedome looks a far more sophisticated and better developed unit.
No doubt that will upset a few Pulsar owners.

I was hoping to get a bigger Pulsar but their promised 3.5m was never released.
Domes are pricey but the instant access and peace of mind in knowing it will all still be there after a storm is worth every penny.
The recent torrential rains is proving a sore trial for my home made dome's seams.
Manageable but a bit of a nuisance. Though I still don't need a scope cover. It only "rains" around the edges.

Haha. Not sure of the obby name yet, I am expected to form an astronomy club and need to be careful not to upset my neighbours...

When ordered, the difference between the Pulsar and Scopedome was around a thousand pounds, but it all depends on the exchange rate. Plus, being in Europe already, carriage costs were better - it really hurts costs to cover the channel crossing so my advantage would become a disadvantage in the UK...

I also get torrential rain here and not a single drop of water gets into the dome, so happy with the weather proofing. I have no axe to grind with the Pulsar, it was actually a close call between the two but the shutter width was the winning feature for me. Having purchased the Scopedomes, for sure, they are very well engineered and pre-assembly in the factory before shipping makes sure they will fit together quickly and easily on site. The only thing to be aware of is the flat and level base requirement. Less than 1mm on flatness and 0.5 degrees on level. The brick construction was done slowly and levelled carefully as we go and the occasional use of a grinder to take out any high spots made assembly easy.

I am sure the same care and attention applied to a Pulsar would also pay dividends. (Please don't hate me, Pulsar owners !!)

Gordon.

On 10/10/2019 at 13:46, DaveS said:

Just picked this up again. Very impressive! To say the least.

I've also gone with a 16200 camera as being less crazy expensive than a 16803, especially WRT filters, though after some consideration went Moravian rather than SX with a 7 place wheel for std LRGBSHO filters. Was also at the OOUK stand at Astrofest this year, but decided that the ODK 12 was my sweet spot, and probably a one-man bucket, rather than a team heave-ho, and the DDM85 breaks down into two parts.

Cost has also precluded a dome so going with a rough and ready ROR.

Can only admire such a comprehensive observatory build.

Thanks, Dave.

agree on thecost of the 16803, even though the ODK could light the chip, the costs of 2" square filters also hammers the overall cost. It might not seem like it, but I really do have a limited budget which does set a ceiling on what I can do.  And there are compromises everywhere.

The 16" ODK is a bit of a monster. It does demand a substantial mount, not just the weight but the focal length too. The 12" is an impressive scope too and you are probably right, for price/performance, it is most likely the sweet spot.

For the domes, I am on top of a bit of an exposed hill, so protection from the weather was key. The weather station has displayed force 7 winds and I did not fancy risking a home-made ROR enclosure. The choice was between the 2.7m Pulsar and the Scopedome. The Pulsar would have been fine for the 12", but I thought for the 16", the aperature was a little tight. The cost difference was not that big, but the Scopedome just seemed to be better thought out, although pretty demanding of the base....

Gordon.

On 10/10/2019 at 13:42, Rusted said:

Sorry, that should have been 'Erstmonceau with a Peter Sellers French accent.

Looks like I might have a name for the observatory now... Mind if I use the name?

On 10/10/2019 at 10:55, Marvin Jenkins said:

I have been given permission by Gordon to hijack this thread, cheers. I visited Gordon Monday Tuesday to help install some security fencing around the perimeter of the Obsy area.

We were hoping for clear skies Monday night so I could use Gordon’s Dob, a first for me and experiment with eyepieces as my small box of plossle’s seemed shockingly inadequate to the eyepieces that were on offer. Sadly it was cloud all the way.

I have added a few pictures to this post, as the beast is now installed in the second dome and I couldn’t believe the quality of the mount. That bit of carbon fibre at the top is a joy to behold. Hoping to get invite back in the future to see it all in action, fingers crossed.

 

 

 

You are very welcome to come back anytime, just remember to bring your work clothes too !!! (haha)

But a serious thank you for coming over to help.

Marvin brought his petrol driven auger to cut the holes for the fence posts.. Didn't touch the hard clay and stones that counts for "soil" here. Luckily he also brought his big concrete breaker and every hole was dug out the hard way. Should have only needed one day, but took two. Since then, I have filled in the perimeter with more gravel, around a tonne down and still a lot more to do....

My two sons are visiting next week and if all goes well, hoping for first light if the clouds (and moon) don't mess everything up...

Gordon. 

5 minutes ago, Dr_Ju_ju said:

Why do you need clothing !!, go au-naturel, especially as your living somewhere a lot warmer that the UK. 2 pairs of Tee-Shirt \ Shorts should be all you need.....

Errr... It's not me that wants/needs clothes...

(it's NEVER me haha !!)

Gordon.

3 hours ago, Marvin Jenkins said:

Tax rebate! In France, just like dark matter, never seen it.

Marvin

Not from France, the UK... Having said that, I got my 2018 tax statement from the French authorities and they want Zero Euros for the time I was here in 2018. I am sure it wil lbe a different story for 2019 though...

According to my calculations, for 2018/9 I have put too much money into the account so should be entitled to some of it back. If so, then I will have some money for more toys (assuming Mrs. Bukko does not claim it for some frivolous stuff like food or clothes..

Gordon.

4 hours ago, Rusted said:

Buy two observatories get one free! Whatever happened to discount for bulk?

 

Nope. Full price for the domes, only a bit of a reduction for the transport. Even threatened to purchase something else, they were prepared to let me go so I guess that's the price. Probably not much margin to be had.

19 hours ago, Rusted said:

Congratulations on your truly impressive build.

No need for the hideously expensive Starlight motor focus system.
The cheapest Skywatcher clone DC motor focuser easily drives the 3.5" Starlight FT focuser via one of the black motion knobs via a timing belt and 10T pulley.
It will vertically lift the weight of the Lacerta 2" solar prism and ZWO camera or binoviewer. Even more if you drive the golden slow motion knob.
You won't want nor like the cheapo paddle in the kit though.
Remote motor focusing is a huge bonus even if you are right beside the telescope. Particularly when focusing via a big monitor.
The difference in whether you are in exact focus or completely out is absolutely microscopic even on my 7" f/12 refractor.
You wouldn't know this until you stopped using manual focusing. 

Thanks for the compliment.

I hope it's being entertaining.

The need for a motorised focuser will be tested hopefully soon. I have a focusing mask for the 12" but not the big ODK. But I stilll have a lot of the computer stuff to complete, including how to port forward through a 4g internet connection, not supported by the telecoms companies nor VPN suppliers. Being able to remote control this is part of the design basis but I did not appreciate how a phone connection is managed very differently from a wired one. Use of Teamviewer is not even close to being a preferred option.

But the motor drive is pretty high on my list of improvements so likely to be done sooner than later. Hopefully Mrs Bukko will agree to the spend without making me go back to work and pay for it... Maybe a tax rebate will be forthcoming... haha

Gordon.

Great week this week, the counterdeight shaft extension arrived and when added, the 3kg shaft pretty much balanced one of the 5kg weights I had added. Moving them around has given me the balance with loads of movement left. So only three were needed.

Now I have the Skywatcher C/W that I had cut in half to dispose of, so I am thinking of putting it on ebay and mark it as "slightly used". 🤣🤣

Gordon.

1 hour ago, Adam J said:

I would say thats a good choice but I would make sure it is compatable with EQ Mod. 

Good thinking Adam. Yes, it is ASCOM compatible and FLO offers a USB cable for pc control. I know initially it will be controlled from the handset and so it is not a deal breaker, but good to know there is flexibility.

Gordon.

Thanks Shaun and Adam for the inputs.

My gut feeling was of the two, the 35 would have been the better choice. But weight (size) is an issue as my son lives in a shoebox* in central Reading so rules out the HEQ5. As I said, I already have one and agree it would be a better choice again if it was a contender.

Since I opened the thread, my son and I have been talking further and now include the iOptron CEM25P. Lightweight and better engineered although more expensive. All the cabling is internal and it also hase very good reviews. It's been out for a few years now so we will not be buying something still in development.

The plan will be to pull the trigger around the middle of September and at the moment, we both agree the stiff axis on the SW range is a problem, so unless we uncover something seriously wrong with the iOptron, I think that will be the choice now...

*Of course, not really a shoebox, but not exactly spacious....

Thanks for all inputs and hopefully you agree the iOptron is a good choice (If you have thoughts to the contrary, then please let me know as they are new to us..)

Gordon.

Will try and get a picture for scale purpose. (I am 6' 1" and can't see the mirror...)

First light will be a few weeks, the weather has not been great and I keep being sidetracked with other priorities. My sons are planning on coming over in September/October so if not before, then I wil llean on them to help with the programming....

Gordon.

15 minutes ago, Laurin Dave said:

Hi Gordon..  that all looks great .. the Lakeside focuser will fit on the FT..  with a custom bracket  got one on mine, works well.  SX-46 or 56 ?  

Dave

46...

I baulked at the runaway costs of going for the 56 and associated hardware upgrades to go with it.

I looked at all the 16200 options and went for the SX. I already have good experience with their stuff and their aftersales is excellent. The big 9 position FW allows me to have a full set of filters and the integrated OAG tidies everything up. OO took the dimensions of the system and fabricated a socket with the correct back focus distance.

The Lakeside would be my first choice, IKI sold them, but he is now closing down.

Really, the pix do not do the system justice.

Gordon.

Will probably get there sometime, but for now, I have enough going on to keep me occupied...

A couple of nights ago, we were woken with the sound of water running from the downstairs kitchen - hidden behind one of the water heaters, the "plumber" had capped the ends of the water lines with iron fittings. The one on the hot water side had failed and mains pressure water was flooding the kitchen, the hallway, into the store room and the lounge. Thankfully the water did not get into the bedrooms and only the hall carpet and a couple of smaller rugs got wet in the lounge. I mean, what sort of idiot uses iron in a water system??? It's taken us a couple of days to get everything back to normal.

So having fixed the patio and dried up the extra swimming pool we had in the garage, we found ourselves with another one indoors this time. Not sure it is a selling point though. Anyway, now properly fixed, I am waiting for the next problem...

In the meantime, I will get on with programming the pc's controlling what I have and then see if Mrs. Bukko will let me spend some more...

Gordon.

18 minutes ago, Davey-T said:

Looking good Gordon, will you be adding electronic focusing ?

Dave

Thanks, Dave.

I have been thinking about the focussing, for now, I was going to see how it goes. If I find the focus moves during a session, then I will add it. The focuser is a 3" feathertouch and the Starlight Instruments system is terribly expensive so it would need to be something more reasonably priced...

Gordon.

So latest update.

I Fitted the focuser and camera assembly, so it is fully loaded now. I checked the cables were long enough, as it is quite a lot of work to pull them through further if required. The problem is there were a lot of cables installed already so there was not as much room left as I hoped. Anyway, all done now.

I thought about what James had said and before spending more money, thought it worthwhile checking how much more weight is required. The focuser and camera assembly is pretty heavy so increasing teh amount of imbalance. I found an old unused 5kg SW weight and cut it in half. A bit of gaffer tape and I removed the transit screws. Still top heavy so strapped a second on and it is now slightly weight heavy. So that's slightly over 50kg of counterweights so I guess I am around 50% of the capacity of the mount. Should be good.

Instead of getting the extra weight, I have the extension piece on order and due in on Monday. Hopefully it was the right decision and hanging the weights lower does the job.

Anyway, here's a few snaps showing progress...

Gordon.

Great idea to use linear actuators, plenty of torque for your application.

Just thinking about the plan to rotate the south flap. I looked at the actuator on Amazon and for not much more, you can get one with 450mm of travel. Would this be enough to simply raise and lower the end piece instead of rotating it? My thoughts are you would have less forces on the pivots and also nothing sticking out at (possibly) head height to catch someone during the night...

If you want more travel, then using a couple of pulleys would double the travel...

I have not developed the idea any more than this suggestion, but in my mind, it would be relatively simple..

Gordon,

On 26/08/2019 at 13:15, Taff said:

Thanks Carole' When the scope is fitted to the mount i could try one weight.Then fit a filter wheel and the camera to the scope and see if the mount balance.Mark

There are 3.5kg weights for the EQ3-2 that fit the CW shaft of the EQ6. This might be what Carole managed to pick up.

Adding more weight to the scope will also help, if you fully load the scope as you intend to use it then try again, you might be able to use the larger weight but very close to the mount..

One thing I found when loading the focuser on a small frac is it becomes back heavy and I struggled to move the scope far enough forward to balance without the focuser disappearing under the dovetail.

HTH.

Gordon.