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Equipment Discussions >> Refractors

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bouffetout
scholastic sledgehammer


Reged: 11/21/12

Loc: Canada
Re: Post a picture of your refractors (PART 5) new [Re: Aquarellia]
      #5578980 - 12/19/12 01:57 PM

Tres belle cette aquarelle !

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bouffetout
scholastic sledgehammer


Reged: 11/21/12

Loc: Canada
Re: Post a picture of your refractors (PART 5) new [Re: Kunama]
      #5578990 - 12/19/12 02:01 PM

Beautiful !

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bouffetout
scholastic sledgehammer


Reged: 11/21/12

Loc: Canada
Re: Post a picture of your refractors (PART 5) new [Re: Mr Onions]
      #5578999 - 12/19/12 02:04 PM

I love that scope ! Really...

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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Post a picture of your refractors (PART 5) new [Re: bouffetout]
      #5579904 - 12/20/12 12:32 AM Attachment (85 downloads)

ok its no a pic, but i was laying out a graphic for the dew shield and thru this together.

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Kunama
professor emeritus


Reged: 10/22/12

Re: Post a picture of your refractors (PART 5) new [Re: Pinbout]
      #5580071 - 12/20/12 04:47 AM Attachment (94 downloads)

Latest picture with the new counter weights attached:

Istar Perseus AT150 F10 with 2" diagonal, Vixen LVW 17mm on Robert Ellery designed Thomas Gaunt built Eq mount circa 1877.


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Traveler
Pooh-Bah


Reged: 08/19/07

Loc: The Netherlands
Re: Post a picture of your refractors (PART 5) new [Re: Kunama]
      #5580117 - 12/20/12 06:14 AM

What a great looking mount you have there!

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chboss
professor emeritus


Reged: 03/24/08

Loc: Zurich Switzerland
Re: Post a picture of your refractors (PART 5) new [Re: Traveler]
      #5580765 - 12/20/12 02:05 PM

Classy combination.... WOW!

regards
Chris


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coutleef
Post Laureate
*****

Reged: 02/21/08

Loc: Saint-Donat, Québec, Canada
Re: Post a picture of your refractors (PART 5) new [Re: bouffetout]
      #5581064 - 12/20/12 05:02 PM

Quote:

Super ton réfracteur !




thanks , merci

it makes with the twiligth mount for an easy grab and go combination that will not take long in winter to cool down since it is a doublet. as you mentionned before we are in a country of clouds and classically with my C8, with the time it took to cooldown, the clouds come rolling in before i can take a look. with the refractor i will ne out observing much more rapidly.


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skullpin
sage
*****

Reged: 03/13/09

Loc: Edmonton, Alberta, Canada
Re: Post a picture of your refractors (PART 5) [Re: coutleef]
      #5581198 - 12/20/12 06:05 PM Attachment (66 downloads)

My collection of doublets...

The mini Zeiss is a nice ATM build by PJ Anway. While I had them all out on the dining table, I weighed the TV85 set up at 8.5 lbs and the Borg set up at 11.4 lbs.


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orlyandico
Post Laureate
*****

Reged: 08/10/09

Loc: Singapore
Re: Post a picture of your refractors (PART 5) [Re: skullpin]
      #5581816 - 12/21/12 02:30 AM

This is my lightweight 60mm f/15 Barska department store refractor, both on its original mount, and on an upgraded mount



The focuser is trashy and there's lots of image shift when focusing, I'm thinking of getting a Crawmach at some point..


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JJK
Carpal Tunnel


Reged: 04/28/08

Re: Post a picture of your refractors (PART 5) [Re: skullpin]
      #5581923 - 12/21/12 06:09 AM

Quote:

My collection of doublets...

The mini Zeiss is a nice ATM build by PJ Anway. While I had them all out on the dining table, I weighed the TV85 set up at 8.5 lbs and the Borg set up at 11.4 lbs.




How well does the Zeiss 50/450 work?


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Aquarellia
professor emeritus


Reged: 10/27/12

Loc: Provence, France
Re: Post a picture of your refractors (PART 5) [Re: bouffetout]
      #5581989 - 12/21/12 07:53 AM

Quote:

Tres belle cette aquarelle !



Merci bouffetout, thanks eatall


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billybird
member


Reged: 10/19/10

Re: Post a picture of your refractors (PART 5) [Re: LLEEGE]
      #5583493 - 12/22/12 01:26 AM Attachment (132 downloads)

After dinner tonight I went out to my observatory (in my driveway) and fired up the 1500 watt heater under the seat. The temperature in Minneapolis tonight is about 12F, the air is crisp and we have Jupiter and a first quarter moon overhead. This should be a good night for a bit of cosmic cruising.
After I finish this post I’ll take my thermos filled with hot apple cider out there where the inside temperature will be around 68F. I’ll be out there till 2 or 3 AM. I’ve been known to fall asleep leaning on the eyepiece. Later, when I quit for the night and look in a mirror, I see I have a black eye from the rubber cup on the eyepiece. None of my astronomy buddies can make that statement.
Per the invitation for observatory pictures I offer some shots of Tardis I, my heated observatory. It’s home built, started in 1980 and finished in 89. The scope was built around a rugged 6 inch F-10 Jaegers that I bought for $350 in 1978. By rugged I mean it has not had a lens cover on it for the last 18 years. The objective is always marinated in the outside ambient air so no problem with heat currents. No need to temperature stabilize, it’s always ready to go.
The 1500 watt heater, can hold an inside temp of 65F with the outside temp as low as -20F. In use for nearly 23 years I remember only once when I had an image problem due to inside heat. During a “star party” with a group of 8 year olds, Jupiter looked like a jiggling ball of jelly and I was befuddled by the cause. With young people hanging on the eyepiece inside and several more waiting on the entry stair with the door open I realized what the problem was. I told those standing to get off, and shut the door. I’ve never had a problem with heat since.
A feature of my design is the layout of the mounting. It shares some resemblance to the Naysmith design with some large differences. I use the term asymmetric alt/az to describe the Tardis I mounting. The significant word is “asymmetric”. Simply stated, asymmetry allows that for any object in the sky there are two possible positions for the scope (objective lens) to view a given object. One position places the objective up wind of the heated cabin and the other downwind. The objective lens can almost always be positioned up wind in virgin outside air. Heat rising up from the enclosure is drawn down wind, away from the objective. I must admit, although I believe the above is true, I have never had to consider “upwind or downwind” while viewing. Heat rising has never been a problem with viewing. Keep in mind, the enclosure is well insulated.
At 81 years old, I can be up and running in two minutes flat. (same to shut down). Last week we had our first snow for the season here in Mpls. We received 17 inches (see photo) and I did use a broom today. I’m not into fancy observing (high tech stuff), I just enjoy “cosmic cruising”.
Cheers,
billybird

Edited by billybird (12/22/12 01:38 AM)


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billybird
member


Reged: 10/19/10

Re: Post a picture of your refractors (PART 5) [Re: billybird]
      #5583506 - 12/22/12 01:47 AM Attachment (98 downloads)

I had 3 pictures to share about my refractor and for some reason it would only suck up one shot. I will try sending them separately.
billybird


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billybird
member


Reged: 10/19/10

Re: Post a picture of your refractors (PART 5) [Re: bouffetout]
      #5583512 - 12/22/12 01:53 AM Attachment (80 downloads)

This is the business end of my observatory Tardis I. The objective is a Jaegers 6 inch F-10. The glass is BK-7 and F-2.
billybird


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EdTheEdge
Carpal Tunnel


Reged: 04/10/09

Loc: Lomita, CA
Re: Post a picture of your refractors (PART 5) [Re: billybird]
      #5583537 - 12/22/12 02:33 AM

This the most awesome thread on the internets.

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billybird
member


Reged: 10/19/10

Re: Post a picture of your refractors (PART 5) [Re: EdTheEdge]
      #5583553 - 12/22/12 03:13 AM Attachment (80 downloads)

Tardis I has been a real hit with kids. While viewing they can put their entire weight on the focuser and the image will not move. This is a matter of physics and is true.

Attached are 3 views taken during the Venus transit.

billybird

Edited by billybird (12/22/12 03:18 AM)


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billybird
member


Reged: 10/19/10

Re: Post a picture of your refractors (PART 5) [Re: billybird]
      #5583565 - 12/22/12 03:39 AM Attachment (72 downloads)

For some reason ? I cannot enter more than 1 picture so here are a couple more taken during the Venus transit

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JJK
Carpal Tunnel


Reged: 04/28/08

Re: Post a picture of your refractors (PART 5) [Re: billybird]
      #5583581 - 12/22/12 04:10 AM

Quote:

I had 3 pictures to share about my refractor and for some reason it would only suck up one shot. I will try sending them separately.
billybird




Billybird,

Did you ever bring this setup to the StellaFane convention? I thought I saw it in the early 1980s and that it was one of the coolest devices I'd ever seen.

Best,
John


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skullpin
sage
*****

Reged: 03/13/09

Loc: Edmonton, Alberta, Canada
Re: Post a picture of your refractors (PART 5) [Re: JJK]
      #5583585 - 12/22/12 04:24 AM

Quote:

How well does the Zeiss 50/450 work?




For a 50mm scope, pretty good. Low colour and a fun scope.


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