Solar finder

Frankenscope? Let's see it!***be advised that NOTHING in this forum has been safety tested and you are reading and using these posts at your own peril. blah, blah, blah... dont mess around with your eyesight when it comes to solar astronomy. Use appropriate filtration at all times...
Post Reply
User avatar
swisswalter
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 17951
Joined: Thu Feb 06, 2014 4:28 am
Location: Switzerland
Contact:

Solar finder

Post by swisswalter » Thu Nov 17, 2011 5:59 pm

Hi all

just in case some newbie want's to make his owne solar finder for a dime








Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

User avatar
Montana
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 19741
Joined: Mon Oct 17, 2011 5:25 pm
Location: Cheshire, UK

Re: Solar finder

Post by Montana » Thu Nov 17, 2011 7:34 pm

That's great Walter but how do you make the bit of metal?

Alexandra

User avatar
marktownley
Librarian
Librarian
Posts: 24461
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: Solar finder

Post by marktownley » Fri Nov 18, 2011 12:00 am

Brilliantly simple idea walter!

One of my students in my Product Design class (he's also in my astronomy class and has the school PST on long term loan) is designing a solar finder as part of his final year project. He has quite a few interesting (and subtley different) ideas for prototypes for finders which I hope we can post out for people to try and report back with feedback in the near future. It would be a great help for his project and I think you kind folks here would find interesting and beneficial.

Watch this space!!! :)
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

Bill E.

Re: Solar finder

Post by Bill E. » Fri Nov 18, 2011 1:14 am

Mark ,I will be looking forward to your future post.

User avatar
swisswalter
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 17951
Joined: Thu Feb 06, 2014 4:28 am
Location: Switzerland
Contact:

Re: Solar finder

Post by swisswalter » Fri Nov 18, 2011 5:17 am

Hi Alexandra

yes it is as Apollo pointed out, a PC slot cover. Just bent on each side and a drilled hole. Attached with a double sided tape to the OTA
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

Roel
Oh, I get it now!
Oh, I get it now!
Posts: 35
Joined: Sun Dec 04, 2011 9:00 am

Re: Solar finder

Post by Roel » Sun Dec 04, 2011 9:13 am

Good job!

When you drill a hole at the location of the cross and stick a piece of masking tape over it, you can see the projected image of the sun from the eyepiece side of the telescope. This is how I built mine:

My sketches, observations and ATM projects: www.roelblog.nl

Pedro

Re: Solar finder

Post by Pedro » Sun Dec 04, 2011 11:37 am




Gerat idea. I used a comercial solution to fit a solar finder to my LUNT 152 (had to work for 10 min at my workshop to fit the finder to the OTA). Interesting that an expensive telescoe like the LUNT 152 does not have a solar finder...

User avatar
solarchat
Site Admin
Site Admin
Posts: 3951
Joined: Sat Feb 01, 2014 3:10 pm
Location: Atlanta, GA USA
Contact:

Re: Solar finder

Post by solarchat » Sun Dec 04, 2011 1:38 pm

Pedro,
The LS152 does not have a solar finder on purpose. The rings have an identical right angle shape built in to both of them so that you look for the shadow of the first ring on the second one and then align the shapes together. I wish that every solar scope used this because it never needs aligning or adjusting and it is always 100% correct and centered.
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org

Pedro

Re: Solar finder

Post by Pedro » Sun Dec 04, 2011 3:07 pm

Hi Stephen:

You are of course right and I read this in the available documentation. However the use of a solar finder (sol searcher) is a better way to find de sun. The shadows inside an observatory sometimes are not easy to manage. With the FS128 I use the projection of my Taka 50x10 finder to center the sun.

best regards

vidman
Almost There...
Almost There...
Posts: 537
Joined: Sat Nov 19, 2011 9:09 pm

Re: Solar finder

Post by vidman » Sun Dec 04, 2011 3:44 pm

Great idea
Chuck

Solar Noobie learning from the Best group around.

Nighttime Astro-Nut (Not "sissy" stuff...we have to deal with wild animals and cold in the dark...LOL)

Roel
Oh, I get it now!
Oh, I get it now!
Posts: 35
Joined: Sun Dec 04, 2011 9:00 am

Re: Solar finder

Post by Roel » Sun Dec 04, 2011 7:35 pm

I believe the most convienient way to center the sun is when you can actually SEE the projected image of the sun from a position behind the eyepiece. To find the Sun using the tube ring method requires standing up an look on the other side of the tube ring. The Televue finder with its semi transparent projection screen method (or a "walter"-design) close to the euepiece) does not.
My sketches, observations and ATM projects: www.roelblog.nl

User avatar
swisswalter
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 17951
Joined: Thu Feb 06, 2014 4:28 am
Location: Switzerland
Contact:

Re: Solar finder

Post by swisswalter » Sun Dec 04, 2011 8:09 pm

Hi Roel

thank you for your thoughts. I'm not fishing for compliments, but the "walter design" is so simple, straight forward, easy to make and handle and cheap. It should get a nobel prize ;-)
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

User avatar
swisswalter
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 17951
Joined: Thu Feb 06, 2014 4:28 am
Location: Switzerland
Contact:

Re: Solar finder

Post by swisswalter » Sun Dec 04, 2011 9:00 pm

Hi Theo

thank you very much ;-) I'm honored
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

iwatkins
Ohhhhhh My!
Ohhhhhh My!
Posts: 199
Joined: Sat Mar 24, 2012 8:47 am

Re: Solar finder

Post by iwatkins » Sun May 13, 2012 8:34 pm

Holy thread resurrection Batman!!

Mark,
If your student needs a tester, just yell. :)

I like nothing better than having a tinker in the workshop, you know, cut some metal, hit with a hammer, paint or polish. I'm not very good but it relaxes me. I'm looking and making myself a nice solar finder for the big frac. using a 50mm tube to go on the finder bracket/rings. So I'm interested in any weird and wonderful designs anybody can point me to.

Cheers

Ian

User avatar
marktownley
Librarian
Librarian
Posts: 24461
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: Solar finder

Post by marktownley » Sun May 13, 2012 9:11 pm

I'll dig one out for you ;)
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

peter drew
Im an EXPERT!
Im an EXPERT!
Posts: 263
Joined: Sat Feb 04, 2012 6:18 pm

Re: Solar finder

Post by peter drew » Mon May 14, 2012 9:39 am

I use a stock 30mm finder with a 6mm hole in the objective cover cap with a piece of solar film glued to the inside face. It still works as a dust cover. :)

User avatar
swisswalter
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 17951
Joined: Thu Feb 06, 2014 4:28 am
Location: Switzerland
Contact:

Re: Solar finder

Post by swisswalter » Mon May 14, 2012 4:17 pm

Hi Peter

great idea, but my bent PC slot cover is still cheaper :P
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

dragoncity
Oh, I get it now!
Oh, I get it now!
Posts: 21
Joined: Wed Apr 18, 2012 3:44 am

Re: Solar finder

Post by dragoncity » Tue May 15, 2012 10:28 am

Theres a nice collection of Solar Finders on this .PDF file

http://www.dd1us.de/Downloads/a%20colle ... %200v4.pdf

I knocked up a #12 from scrap ali tubes, MDF 'timber' and it works great. The main advantage of #12 is that its self aligning to any non-tapered scope tube. I simply rubber band it to the SolarMax. Alignment in 5 seconds its that easy.

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest