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Royal Astro LN 10E

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#51 Bob Myler

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Posted 19 June 2014 - 08:50 AM

Looks well-built - maybe you have the beginnings of a gravity drive there? :cool:

#52 tim53

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Posted 19 June 2014 - 08:52 AM

Or a slow motion? Doesn't it have a clock drive? If so, I don't see how this could overcome the drive. But if not, or if there's some planetary gearing or something, it might be a pretty clever way to make manual adjustments without jiggling the mount.

...not that that mount could be jiggled easily!

-Tim.

#53 xavier

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Posted 19 June 2014 - 05:06 PM

Jiggling want be possible... Only the tube is 45kg...
Lot's of brass and cast iron.

Finished cleaning the mount and the clock drive. Renewed the old grease.

The small red lamp isn't a lamp but a electric heating against humidity. The motor block is covered with a plastic foil against dust. Clever.

Yes there is a clock drive (large one) and the cord is for manual slow motion. It can be used when the motor turns.

Has anyone seen this cord system on another mount?

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#54 CharlieB

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Posted 19 June 2014 - 05:17 PM

Is there a dedicated power supply for the scope? I noticed that the motor is 100v at 50Hz. I wonder where that voltage and frequency was a standard?

Edit: Oops, looks like that is a standard in eastern Japan.

#55 xavier

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Posted 19 June 2014 - 05:28 PM

There is a transformer 220v -> 100v

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#56 CharlieB

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Posted 19 June 2014 - 06:54 PM

Sure glad you have that!

#57 Steve_M_M

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Posted 21 June 2014 - 10:31 PM

Jiggling want be possible... Only the tube is 45kg...
Lot's of brass and cast iron.

Finished cleaning the mount and the clock drive. Renewed the old grease.

The small red lamp isn't a lamp but a electric heating against humidity. The motor block is covered with a plastic foil against dust. Clever.

Yes there is a clock drive (large one) and the cord is for manual slow motion. It can be used when the motor turns.

Has anyone seen this cord system on another mount?


Xavier,

My 1956 Goto Kogaku 6" had the cord for slow motion in RA. It was a long leather cord that the user held to compensate for the gravity drive. Unfortunately, I am in the process of moving and I won't be able to post any pictures for a few weeks...

#58 gelkin

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Posted 22 June 2014 - 01:03 PM

Very interesting Xavier. Looking forward to more of your discoveries. :bow: :bow:

#59 xavier

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Posted 22 June 2014 - 03:10 PM

Hi Steve,
It would be interesting to compare the GOTO solution.
I keep you posted, Gerald ;-)

BTW: just bought a second Royal Astro Newton. A 16cm (5") on a pier with the original drive. It's definitely the Royal Astro season.

#60 Glen A W

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Posted 22 June 2014 - 04:01 PM

AWESOME. With the higher F ratio, this will very likely beat the shorter scopes on the moon and planets. I have found that even going from 4.5 to 6 makes a big difference. This will be especially true if the coatings are good and the mirrors are very smooth. Good luck with that scope!

Glen

#61 xavier

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Posted 22 June 2014 - 06:16 PM

Thank you, Glen, for the remark.
The 10" is a f:7.2 and the 6" a f:8.6
That's already a big difference. I'm used to scopes f:10 and higher. For me an f:7 is already a fast scope.

#62 xavier

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Posted 25 June 2014 - 05:52 AM

Finally the Royal Astro is set up
It's huge telescope. A beauty.
The test images are great.

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#63 xavier

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Posted 25 June 2014 - 05:52 AM

Another one

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#64 xavier

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Posted 25 June 2014 - 05:53 AM

The mount and scope are up and running

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#65 combatdad

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Posted 25 June 2014 - 06:13 AM

It's huge telescope. A beauty.


An understatement for sure! Great find.

Dave

#66 stevenk

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Posted 25 June 2014 - 08:04 AM

Absolutely Stunning !!!!
I have an LN4e 100mm F10 reflector and mine looks like a scaled model of yours. The focuser on your 10 inch looks like a larger version of the one on my LN4e.
Your guidesope seems to be like the guide scope on my Royal 90mm refractor

I bet the images from this beast are magnificent

I did some research on Astro Optical and had posted my findings on this forum a few years back. I do have an actual photo of your model at the factory in Japan I will try and dig it up

Congratulations - you indeed have a quality and rare instrument.

Steve

#67 xavier

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Posted 25 June 2014 - 09:52 AM

Hi Steve,
I'm very curious about your findings about Astro Optical.
Couldn't find them in the archive.
Would be great to see the photo of the factory.

Xavier

#68 mikey cee

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Posted 25 June 2014 - 10:12 AM

Xavior you've got the same sliding weight system as I have on my 20TE. One long shaft and one short shaft. ;) Mike

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#69 CharlieB

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Posted 25 June 2014 - 10:52 AM

Just for fun, here are your scope's little brother and baby brother - LN3-E and LN4-E. They are dinky compared to that magnificent LN10-E, but you can certainly see the family resemblance. Now you have to search for one of the 12-E's.

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#70 xavier

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Posted 25 June 2014 - 11:02 AM

That are great scopes!
You can see that they're family.

Have found a another 15cm (6") Newton on the same mount as the refractor.

The 12"... That must be huge and heavy. You no idea how heavy the 10" is.

#71 CharlieB

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Posted 25 June 2014 - 11:47 AM

The LN6-E is a great scope - a good compromise between aperture and weight. I passed up a chance to buy one when I bought the LN4-E. Habsburg8 (John Siple) was selling off some of his scopes through AMart a few years back and I probably would have bought both of them, but the shipping was ghastly expensive. I think the scope itself went for somewhere around $200.

#72 terraclarke

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Posted 25 June 2014 - 07:59 PM

Absolutely wonderful, pristine Newtonian reflector Xavier. Gorgeous! And in just about mint condition. What a rare and amazing find. The pictures of the complete setup were well worth waiting for. :bow:

#73 xavier

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Posted 26 June 2014 - 01:00 AM

Thank you , Terra, for the compliments.
The scope is a real time capsule.

Collimated the Newton. So easy. Only had to tweak a little the secondary mirror. The terrestrial views are promissing: sharp and a good contrast.

#74 stevenk

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Posted 26 June 2014 - 04:52 AM

Xavier
Here are some photos
I think this may be yours - I also got a hold of catalogue from Astro Optical which I scanned and distributed - someone actually had it uploaded to a geodata site- it's there - I am not sure if it should have been uploaded but I can find that for you.
Steve

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#75 stevenk

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Posted 26 June 2014 - 05:00 AM

Japanese amateurs with AStro optical scopes

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