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Equipment Discussions >> Classic Telescopes

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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
This One Came In Mail Today Brandon 4" F/1555
      #5438746 - 09/24/12 08:40 PM Attachment (99 downloads)

just the lens....Brandon 4" f=1555
wrapped metal tape around cell and dropped it in my 4" unitron
than taped it in place...no Collimation but i checked and all 3 circles were touching...not to bad but not spot on.
took it up to 222 on moon and it has great views.
this lens was made somewhere around 1948.
only a few were made.(100)
no color on moon unless i take it out of focus then
just barely.
the spacing is around a inch between crown and flint.
it needs a good cleaning and i will make a cell
to fit unitron tube.
unitron has been sitting without drawtube for a while
so i made one out of brass last week.
it was made with thick wall tubing and now its about
.030 wall and slides better than the original one.
woke up one morning and was having my coffee and
checking the bay...and there it was...buy it now.
here are a few pics.


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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5438747 - 09/24/12 08:40 PM Attachment (61 downloads)

another

Edited by mustgobigger (09/24/12 08:41 PM)


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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5438748 - 09/24/12 08:41 PM Attachment (67 downloads)

patsy viewing moon

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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5438751 - 09/24/12 08:42 PM Attachment (52 downloads)

drawtube i made...just put bees wax on after 400 finish and
scotchbrite.


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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5438752 - 09/24/12 08:44 PM Attachment (58 downloads)

the view

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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5438755 - 09/24/12 08:45 PM Attachment (51 downloads)

last one
notice the aluminum block cradle is sitting on
i made that so my goto can drop down in slot like goto mount..
..works great.

Edited by mustgobigger (09/24/12 08:47 PM)


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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5444022 - 09/27/12 06:59 PM Attachment (36 downloads)

did some modifications to an old rear unitron i bought from
brian ...AKA happy idiot.
i did a tinsley like cell as it has radius on both halves
concave and convex to help center front half of cell while
collimating optics.
here are a few parts


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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5444027 - 09/27/12 07:02 PM Attachment (26 downloads)

still have to match tabs as i left them a little big
till i fitted everything.
going to paint and blacken after doing a little viewing tonight.
i modified inside of unitron part and fabed the other half.
made new springs and rethreaded the unitron part.


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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5444028 - 09/27/12 07:03 PM Attachment (24 downloads)

unitron inside...lower area that is cut has slight concave.

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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5444031 - 09/27/12 07:04 PM Attachment (24 downloads)

assembled...cell just screws on to part i fabricated

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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5444036 - 09/27/12 07:05 PM Attachment (21 downloads)

on the ota...i left just a little of original lip
to seat tube.


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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5444039 - 09/27/12 07:07 PM Attachment (32 downloads)

did collimation in about 2 minutes and still
on target with homemade drawtube extended.


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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5444045 - 09/27/12 07:10 PM Attachment (30 downloads)

hopefully i will get to powdercoaters this week and have mount
...pier and telescope done sometime next week....

Edited by mustgobigger (09/27/12 07:11 PM)


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starman876
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Reged: 04/28/08

Loc: VA
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5444149 - 09/27/12 08:22 PM

as always nice work Brian.

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Jae
Pooh-Bah
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Reged: 04/13/06

Loc: New England
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: starman876]
      #5445401 - 09/28/12 03:23 PM

Excellent ! Very nice find, Brian.

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Dr Morbius
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Reged: 02/06/07

Loc: ManorvilleNY-but not for long
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: Jae]
      #5446067 - 09/29/12 12:00 AM

I must say, you do good work!

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akman1955
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Reged: 09/07/09

Loc: Alaska, USA
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: Dr Morbius]
      #5447499 - 09/29/12 08:54 PM

Brian great work as always!! still have the "rare" polarex compact?? i have never seen another one.john

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mustgobigger
Postmaster
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Reged: 06/12/07

Loc: Michigan
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: akman1955]
      #5447952 - 09/30/12 05:46 AM

Thanks guys,
John...yes I do.. .even found a polarex
drive for my 142.
Never finished box yet..its holding
Dew shield for Ap.


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JWW
Pooh-Bah
*****

Reged: 12/12/05

Loc: Arizona or Mexico hard to tell
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: mustgobigger]
      #5448618 - 09/30/12 02:40 PM

Sick ...

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clintwhitman
Caveman
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Reged: 01/01/07

Loc: CALI SoEasyACavemanCanSlewIt
Re: This One Came In Mail Today Brandon 4" F/1555 new [Re: JWW]
      #5519246 - 11/14/12 09:31 AM

Very nice Brian!! BrandonTron

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