Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Miscellany

  • Please log in to reply
1923 replies to this topic

#1901 Kasmos

Kasmos

    Cosmos

  • *****
  • Posts: 7,535
  • Joined: 19 Aug 2015
  • Loc: So Cal

Posted 18 February 2025 - 02:31 PM

Even though F/15 may appear colorless CA at near invisible level is there doing it's best to

affect resolution. At F/20 the view is very clean. I notice whiter whites, and best of all a 60mm

with a focal length of 1200mm for easy high power. What else would you use a 60mm for but

high power work. 

I suppose we will need to talk to some Japanese amateurs to know more, I'm not finding much

information on the subject. 

I wonder if the F/20's were for guidescope duty, being closer to the focal length of the primary

instrument. Or just a special model made especially for someone seeking perfection.

 

Robert

I'd say they were specialized for having very sharp color free views for lunar, planetary, and double star duty.

Guide scopes?  I've only seen them as stand alone kits.

 

BTW, The first views after I installed the f/17 Tasco 9TE-5 Objective in the Soligor, I actually whispered to myself "wow".


  • clamchip, Bomber Bob and Garyth64 like this

#1902 cavecollector

cavecollector

    Ranger 4

  • *****
  • Posts: 374
  • Joined: 21 Feb 2020

Posted 18 February 2025 - 02:55 PM

At f/20 and slower, that's where a strange kind of visual magic happens. It's where simple achromats start being able to blow away expensive fast apochromats in terms of contrast.and resolution for visual observing  (not astrophotography).


  • ericb760, steve t, Bomber Bob and 1 other like this

#1903 clamchip

clamchip

    Hubble

  • *****
  • topic starter
  • Posts: 13,911
  • Joined: 09 Aug 2008
  • Loc: Seattle

Posted 22 February 2025 - 01:36 AM

TeleVue Literature:

https://www.televue....pdf/Literature/

 

More TeleVue  from Company 7 library:

http://www.company7....telescopes.html

 

High schooler Al Nagler at the helm of his 8 inch reflector 1955 Mechanix Illustrated:

https://www.televue....lsReflector.pdf

 

Robert


Edited by clamchip, 22 February 2025 - 02:06 AM.

  • Paul Hyndman, tim53, John Rogers and 4 others like this

#1904 deSitter

deSitter

    Still in Old School

  • *****
  • Posts: 21,381
  • Joined: 09 Dec 2004

Posted 22 February 2025 - 02:08 PM

I received one of these yesterday - a really nice accessory for using Meade finders on Vixen shoes. Very nicely made. Tight tolerances and smooth fit.

 

https://www.aliexpre...6535544716.html

 

-drl


  • ericb760 and Bomber Bob like this

#1905 98105dude

98105dude

    Viking 1

  • *****
  • Posts: 668
  • Joined: 24 Apr 2008

Posted 23 February 2025 - 10:15 PM

Nifty - lots of cool stuff on that site I'd say.



#1906 deSitter

deSitter

    Still in Old School

  • *****
  • Posts: 21,381
  • Joined: 09 Dec 2004

Posted 23 February 2025 - 11:45 PM

Nifty - lots of cool stuff on that site I'd say.

Amazingly cheap! Couple of standard Vixen shoes for $7 bucks. Same accurate construction. Don't expect overnight delivery :)

 

-drl



#1907 deSitter

deSitter

    Still in Old School

  • *****
  • Posts: 21,381
  • Joined: 09 Dec 2004

Posted 23 February 2025 - 11:48 PM

TeleVue Literature:

https://www.televue....pdf/Literature/

 

More TeleVue  from Company 7 library:

http://www.company7....telescopes.html

 

High schooler Al Nagler at the helm of his 8 inch reflector 1955 Mechanix Illustrated:

https://www.televue....lsReflector.pdf

 

Robert

In the Nagler 8" article - make a counterweight by filling the space between two wood disks with concrete :) That's great! That's just a great article!

 

-drl



#1908 clamchip

clamchip

    Hubble

  • *****
  • topic starter
  • Posts: 13,911
  • Joined: 09 Aug 2008
  • Loc: Seattle

Posted 24 February 2025 - 01:35 AM

These two telescopes were used in a observation station for fire control of coastal guns.

The big one was a Depression Position Finder for target tracking and the small one a Azimuth Telescope to record

the fall of fire. Jaegers was selling the Azimuth Telescope for a while, I've never seen a DPF for sale.

One of my favorite places is Ft. Casey, now a state park and largely intact, well mostly, and you can wonder around and

be fascinated by it all. Two other forts, Ft. Worden and Ft. Flagler, also now parks made up a triangle of fire protecting

Puget Sound from enemy ships.

Very cool stuff. The end of WW2 saw the end of this technology and the forts became obsolete. I'm glad they are still

standing. Most of it is underground and reinforced concrete yards thick, so they aren't going anywhere in a hurry. Sitting

on some prime waterfront property I'm glad they are protected by the parks system.

More than likely you have something similar near you if you live near a ocean.

Robert

 

DPF_and_Azimuth_Scope.jpg

 

 


  • ericb760, Exnihilo and Bomber Bob like this

#1909 ericb760

ericb760

    Apollo

  • *****
  • Posts: 1,040
  • Joined: 17 Apr 2009
  • Loc: Palm Springs, CA

Posted 24 February 2025 - 02:41 AM

These two telescopes were used in a observation station for fire control of coastal guns.

The big one was a Depression Position Finder for target tracking and the small one a Azimuth Telescope to record

the fall of fire. Jaegers was selling the Azimuth Telescope for a while, I've never seen a DPF for sale.

One of my favorite places is Ft. Casey, now a state park and largely intact, well mostly, and you can wonder around and

be fascinated by it all. Two other forts, Ft. Worden and Ft. Flagler, also now parks made up a triangle of fire protecting

Puget Sound from enemy ships.

Very cool stuff. The end of WW2 saw the end of this technology and the forts became obsolete. I'm glad they are still

standing. Most of it is underground and reinforced concrete yards thick, so they aren't going anywhere in a hurry. Sitting

on some prime waterfront property I'm glad they are protected by the parks system.

More than likely you have something similar near you if you live near a ocean.

Robert

 

attachicon.gif DPF_and_Azimuth_Scope.jpg

I worked for a number of years at the VA Medical Center in Long Beach, CA. Fort MacArthur was just a few miles away in San Pedro. I spent a lot of time wandering the grounds on the weekends. So much history in these old military installations.


  • clamchip and Bomber Bob like this

#1910 Kasmos

Kasmos

    Cosmos

  • *****
  • Posts: 7,535
  • Joined: 19 Aug 2015
  • Loc: So Cal

Posted 24 February 2025 - 04:28 AM

 

BTW, The first views after I installed the f/17 Tasco 9TE-5 Objective in the Soligor, I actually whispered to myself "wow".

It was brought to my attention that in post#1901 I'd mistakenly said 9TE-5 when I meant 7TE-5.

 

I've caught myself from making that error before but this time it slipped thru.



#1911 DAVIDG

DAVIDG

    Hubble

  • *****
  • Posts: 13,068
  • Joined: 02 Dec 2004
  • Loc: Hockessin, De

Posted 05 March 2025 - 10:55 AM

 I've been "retired" as a geeky scientist since November and now running Mt Cuba Observatory. I have made a point to keep learning new things so the brain doesn't turn to mush quite yet. I bought a 3D printer a few years ago and finally set it up and have been printing all kinds of parts from files off the 'Net. So it was time to teach myself FreeCad and design my own stuff. Here is one of my first projects a lens cap for one of my Unitron 114s. I'm now printing a solar filter housing for it. 

 

                 - Dave 

 

unitron cap.jpg


  • Paul Hyndman, deSitter, tim53 and 11 others like this

#1912 deSitter

deSitter

    Still in Old School

  • *****
  • Posts: 21,381
  • Joined: 09 Dec 2004

Posted 05 March 2025 - 11:54 AM

 I've been "retired" as a geeky scientist since November and now running Mt Cuba Observatory. I have made a point to keep learning new things so the brain doesn't turn to mush quite yet. I bought a 3D printer a few years ago and finally set it up and have been printing all kinds of parts from files off the 'Net. So it was time to teach myself FreeCad and design my own stuff. Here is one of my first projects a lens cap for one of my Unitron 114s. I'm now printing a solar filter housing for it. 

 

                 - Dave 

 

attachicon.gif unitron cap.jpg

There is a font that closely matches the UNITRON italic font - it is called APL2 - there are several versions available. APL was IBM's very strange and wonderful language created by one person, Ken Iverson, originally as a syntax for expressing algorithms. It uses a character set that is neither ASCII nor EBCDIC. Here is a sample in the font (APL2 Unicode).

 

-drl

Attached Thumbnails

  • Untitled.png

  • Bomber Bob and Werckmeister like this

#1913 DAVIDG

DAVIDG

    Hubble

  • *****
  • Posts: 13,068
  • Joined: 02 Dec 2004
  • Loc: Hockessin, De

Posted 06 March 2025 - 08:43 PM

 The learning continues. It took me a couple of hours of watching video to get the basic on how to use FreeCad to design parts to 3D print and design the lens cap I made for my Unitron 114. Once I got the basic down it took me less than 10 minutes to design a solar filter cap to hold a piece of Baader film for my Unitron 114.  

   My Unitron is a great 60mm refractor and now with my solar filter I'm going enjoy using it  to view the Sunspots with it. 

 

                  - Dave 

 

unitron solar filter.jpg


  • deSitter, tim53, Bomber Bob and 3 others like this

#1914 clamchip

clamchip

    Hubble

  • *****
  • topic starter
  • Posts: 13,911
  • Joined: 09 Aug 2008
  • Loc: Seattle

Posted 07 March 2025 - 01:03 AM

Allegheny Observatory Records photo collection:

https://historicpitt...rvatory-records

 

Robert 


  • deSitter, tim53, mdowns and 3 others like this

#1915 deSitter

deSitter

    Still in Old School

  • *****
  • Posts: 21,381
  • Joined: 09 Dec 2004

Posted 08 March 2025 - 10:26 AM

Starship failure tracked with a C11!

 

https://youtu.be/DhXZAJA0TZk

 

-drl



#1916 Terra Nova

Terra Nova

    ISS

  • *****
  • Posts: 32,965
  • Joined: 29 May 2012
  • Loc: Kentucky, just south of the Ohio River

Posted 09 March 2025 - 12:39 PM

 I've been "retired" as a geeky scientist since November and now running Mt Cuba Observatory. I have made a point to keep learning new things so the brain doesn't turn to mush quite yet. I bought a 3D printer a few years ago and finally set it up and have been printing all kinds of parts from files off the 'Net. So it was time to teach myself FreeCad and design my own stuff. Here is one of my first projects a lens cap for one of my Unitron 114s. I'm now printing a solar filter housing for it. 

 

                 - Dave 

 

attachicon.gif unitron cap.jpg

Congratulations on your retirement Dave. Now you can do the things you want to do instead of the things other people want you to do! Enjoy.


  • ErnH2O likes this

#1917 clamchip

clamchip

    Hubble

  • *****
  • topic starter
  • Posts: 13,911
  • Joined: 09 Aug 2008
  • Loc: Seattle

Posted 14 March 2025 - 12:11 AM

Old Lomo Astele catalog: 

https://web.archive....lish/index.html

 

Robert



#1918 clamchip

clamchip

    Hubble

  • *****
  • topic starter
  • Posts: 13,911
  • Joined: 09 Aug 2008
  • Loc: Seattle

Posted 14 March 2025 - 01:29 PM

I enjoy this guy's video's and here he is comparing our favorite orange C5 to a modern freshly coated

multi-coated 5 inch Maksutov. I've always felt his reviews reflect my own.

https://www.google.c...ccSIcFI64g,st:0

 

Robert 



#1919 CHASLX200

CHASLX200

    ISS

  • *****
  • Posts: 44,048
  • Joined: 29 Sep 2007
  • Loc: Tampa area Florida

Posted 14 March 2025 - 06:04 PM

I had 5 C5's or 6. I know i had a holes in the forks deal and 3 later 70's deals and a 2002 Nextstar deal and a 2010? Blue tube C5.  I never had a bad C5. All the orange deals were good the 2002 and 2010 were past nuts freaky sharp.  I had two 125 ETX's.  The first version was insane past nuts freaky sharp and a newer version was freaky sharp.  For sure the ETX's were better with more snap chaps.



#1920 clamchip

clamchip

    Hubble

  • *****
  • topic starter
  • Posts: 13,911
  • Joined: 09 Aug 2008
  • Loc: Seattle

Posted 15 March 2025 - 11:28 AM

I ran into another early Astro-Physics catalog, why is this happening to me:

https://astro-physic...ures/870210.pdf

 

Robert

 



#1921 ccwemyss

ccwemyss

    Gemini

  • *****
  • Posts: 3,330
  • Joined: 11 Aug 2016
  • Loc: Massachusetts

Posted 15 March 2025 - 12:59 PM

The Astro-Physics groups.io group has a pinned link to an archive of their old catalogs.

 

Chip W. 


  • clamchip likes this

#1922 Terra Nova

Terra Nova

    ISS

  • *****
  • Posts: 32,965
  • Joined: 29 May 2012
  • Loc: Kentucky, just south of the Ohio River

Posted 16 March 2025 - 11:05 AM

This is interesting!

 

https://www.yahoo.co...-162654511.html

 

 

Attached Thumbnails

  • IMG_0219.jpeg


#1923 Tony Gee

Tony Gee

    Lift Off

  • *****
  • Posts: 16
  • Joined: 23 Jul 2011

Posted 16 March 2025 - 10:47 PM

Thank you, Terra. This has always been a topic of great interest. Hopefully one day we will know the truth.

 

Tony G.



#1924 strdst

strdst

    Fly Me to the Moon

  • *****
  • Posts: 5,159
  • Joined: 23 Mar 2008
  • Loc: Oregon Territory

Posted 17 March 2025 - 01:54 AM

Interesting post Terra. I spent a lot of time observing in SoCal in the early/mid 1960's. I saw a few weird (inexplainable to me) things in the night and even the day. I lived about 100 miles north of Edwards Air Force Base and attributed my sightings to something new and very fast originating from the military...but. About that time I read Project Blue Book and questioned a passage that Venus would be mistaken by a fighter pilot. I mean I was just a kid then and I would even know the difference between a planet and a UFO. Although I was disappointed somewhat by the book and explanations, I tabled my interest/concern.

 

Not long after my dismissal of alien contact possibilities my best friend's mother from across the street claimed to have experienced a ride on a spaceship. OK, she was now out of the neighborhood Tuesday coffee clatch. Too weird for the Mom's (my mom) at that time. I wish I had asked her something about her experience. 

 

Much later I met a gentleman who claimed in a lucid dream he was brought aboard an alien spacecraft and shown scroll energy technology that would power everything forever with no input. He spent the rest of his life trying to back engineer what he was shown. I bought a telescope from him. I kept contact for years and then he died. Our phone conversations were a bit red wine laden, awesome, and unfortunately I never quite understood this scroll tech. Maybe just as well. Oil companies putting a target on my back for fear they'd be out of business tomorrow. He thought they'd hindered his progress. Who knows? I doubt it...but.

 

So a few years ago I asked my sweetheart's father what he thought of the Navy pilots and the TIC TAC experience. He was a Viet Nam era Air Force pilot. Flew cover behind agent orange sprayings, flew big C- I forget transports carrying in equipment, carrying out dead bodies. The usual stuff in the business of war. His response was because they were Navy pilots their accounts weren't worth the time of day. 

 

So my point is, {if I even have one)  is this. When do we stop shunning neighbors from the coffee clatch for their beliefs, discounting others because they're in the wrong branch of the military to be flying airplanes, or listen to the lucid dream crazies over too much red wine? I wish the answer was easy.


Edited by strdst, 17 March 2025 - 01:58 AM.

  • Kasmos likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics