Lunt L60 PT. more aperture

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
Zakalwe
Oh, I get it now!
Oh, I get it now!
Posts: 20
Joined: Tue Feb 12, 2013 4:54 pm

Lunt L60 PT. more aperture

Post by Zakalwe » Fri Feb 15, 2013 4:30 pm

Hello guys and gals,

First post here, so please be gentle :bow:

I bought a Lunt l60 PT in summer after many months of deliberation, and am now waiting for a 50mm DS Etalon to arrive. I'm very pleased with the Lunt, but as always, more aperture beckons.

I'm really interested in some of the outstanding work that's been evidenced here, but I am not at all knowledgeable when it comes to optics, calculations etc. I would love to be able to get a achromatic 120mm (Skywatcher) and use it to get more resolution. As I understand it, I'd need an ERF behind the objective, then the 50mm Etalon, then the L60 etalon. Finally the focuser and BF.

How realistic is this for a noob to do?

Also, Lunt are now selling achromatic telescopes. Has anyone used these to get more aperture?


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: Lunt L60 PT. more aperture

Post by swisswalter » Fri Feb 15, 2013 5:29 pm

Hi Stephen

welcome to that wonderful TOS free site. Have sun, have fun and mod ;-) (Most easely done with a PST)

I would not start with a LUNT 60 mod, and not at all with a LUNT 60 mod double stack. Usually the ERF is up front, makes life easier. Behind the objektiv needs fiddling around inside the scope
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
MjrTom
Almost There...
Almost There...
Posts: 793
Joined: Sat Feb 18, 2012 11:48 am
Location: St Helens - UK

Re: Lunt L60 PT. more aperture

Post by MjrTom » Fri Feb 15, 2013 5:58 pm

Hello :)

Personally I am not sure that its possible or recommended.

However there is quite a community of PST modders on here with achromats upto 150mm.
I recently put one together using a PST and 100mm achromat.
http://solarchat.natca.net/index.php/en ... od-project

Mark
Mark

Ha: Vixen 100mm PST Mod/Solarscope BF20 - Solarscope (IOM) SV50 DS - Borg 45ED/SM40/BF10
White Light: Takahashi FC100-D / Borg 77EDII - Baader Cool Ceramic Herschel Wedge
IOptron iEQ45GT & ZEQ25GT / GIRO III - DMK 31AU03.AS

User avatar
marktownley
Librarian
Librarian
Posts: 25616
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: Lunt L60 PT. more aperture

Post by marktownley » Fri Feb 15, 2013 8:42 pm

How realistic is this for a noob to do?

Hey there! Welcome to this funky place :)

Honest answer (and being gentle!) - for a noob, very unrealistic. Get used to and understand the nuances of your Lunt in current form before you start dissecting it and start making a frankenscope. Take time to have a good read in this mods section first.

Mark
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!

Zakalwe
Oh, I get it now!
Oh, I get it now!
Posts: 20
Joined: Tue Feb 12, 2013 4:54 pm

Re: Lunt L60 PT. more aperture

Post by Zakalwe » Sat Feb 16, 2013 11:39 am

Hmm...more complicated than I expected. I've been lurking on here for a while and am intrigued by some of the frankenscopes.

I don't want to knacker (technical term for "wreck") a £2000 scope :( :(

I have a spare ED80 kicking about, so I might pick up a 2nd hand PST and a ERF and have a play with that. I assume that the BF1200 from the Lunt would be suitable in the focuser?

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

Re: Lunt L60 PT. more aperture

Post by peter drew » Sat Feb 16, 2013 12:19 pm

Sorry to add to the negatives but an ED80 would not be a suitable donor scope for a PST mod, the objective needs to be F10 or longer. Anyway, welcome to this site, the best place for getting you on track. :)

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest