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Author Topic: ERF...at last the final solution  (Read 4530 times)

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Offline Nomis Elfactem

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Re: ERF...at last the final solution
« Reply #15 on: 08:51:18, 05 June, 2009 »
I have been looking at the Lunt ERFs.

Sounds intresting Colin - where have you been looking ?

Also, Nick, you said you got those quotes from a different company - are you able to say which one ?

S.
Simon

Scopes: Astro-Tech AT-111EDT Triplet, TS65ED Quad, Orion ST80, Modded PST-90 Solar Scope, PST Cak (on loan)
Cameras: SXVF H694, Atik 16ic, Canon EOS 600d, DMK41, DMK21, QHY 5L-II (mono & colour)
Accessories: SX USB Filter Wheel, SX OAG, Baader LRGB Ha SI OII Filters, SharpSky Focuser
Mount: EQ6 (EQMOD), SW Star Adventurer, plus a lot (and I mean a lot) of other bits and pieces

Offline Merlin66

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Re: ERF...at last the final solution
« Reply #16 on: 09:13:36, 05 June, 2009 »
Colin,
What are the current sizes and costs of the Lunt ERF's????
C11, C9.25 SCT, 4" Genesis, NEQ6pro, modded 1000D,  ATik314L+, DMK41AF04, SM60DS/BF15, and Spectroscopes (many!).
http://tech.groups.yahoo.com/group/astronomical_spectroscopy/
"Astronomical Spectroscopy for Amateurs", "Grating Spectroscopes-How to Use them" -Springer

Offline NickH

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Re: ERF...at last the final solution
« Reply #17 on: 12:17:09, 05 June, 2009 »
It was absolutely not Lunt....I can assure you of that

Baader work perfectly, good wavefront, no issues at all.

I would trust Solarscope ERF's also, but they don't supply them as seperate entities. There is another company for the ERF, but I can't divulge info just yet



Celestron C11: DSI-C/Toucam Pro 2 ICX mod and SC1.5 mod/ Meade LPI/EOS300D/ED80/WO80ZS/Shoestring guider. PST/PST CaK/ART285

No time....always bloomin cloudy...need to build the Obsy..

Offline colinsk

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Re: ERF...at last the final solution
« Reply #18 on: 07:26:51, 07 June, 2009 »
S40ERF  40mm Energy-Rejection-Filter  99.00 $   
 S50ERF  50mm Energy-Rejection-Filter  109.00 $   
 S75ERF  75mm Energy-Rejection-Filter  150.00 $   
 S100ERF  100mm Energy-Rejection-Filter  325.00 $   
 S130ERF  130mm Energy-Rejection-Filter  570.00 $   
 S160ERF  160mm Energy-Rejection-Filter  745.00 $   
 S180ERF  180mm Energy-Rejection-Filter  1,075.00 $ 

This is RG630 red glass that has been polished to lamda/4 IR reflection coated on the front side and AR coated fro H-alpha on the back side. 
 
 

   
 


   
 


Offline Nomis Elfactem

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Re: ERF...at last the final solution
« Reply #19 on: 10:37:23, 07 June, 2009 »
... or look here for prices in euros (http://www.luntsolarsystems-by-apmtelescopes.com/content.php?catchoice1=&catchoice2=99172&choice=99172).

These prices don't include an adapter... they machine those by request to specific user requirements so no idea of cost.  Also, annoyingly, the sizes go from 75mm to 100mm - an 80mm or 90mm would be far more useful, would you not think

Nicks KG3 filter cost is winning by a mile for me at the mo... just need to find a supplier....

.... the struggle continues...

S.
Simon

Scopes: Astro-Tech AT-111EDT Triplet, TS65ED Quad, Orion ST80, Modded PST-90 Solar Scope, PST Cak (on loan)
Cameras: SXVF H694, Atik 16ic, Canon EOS 600d, DMK41, DMK21, QHY 5L-II (mono & colour)
Accessories: SX USB Filter Wheel, SX OAG, Baader LRGB Ha SI OII Filters, SharpSky Focuser
Mount: EQ6 (EQMOD), SW Star Adventurer, plus a lot (and I mean a lot) of other bits and pieces

Offline NickH

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Re: ERF...at last the final solution
« Reply #20 on: 17:19:13, 07 June, 2009 »
be aware that the poloishing and wavefront needs to be good/bubble free and flat...

Baader so far is the only thing I have come across which works at up to 533X magnification, and holds stable/tac sharp :-)

I have YET to see a TRULY high resolution image from a Lunt H-A product (F50), that is sharp in focus





Celestron C11: DSI-C/Toucam Pro 2 ICX mod and SC1.5 mod/ Meade LPI/EOS300D/ED80/WO80ZS/Shoestring guider. PST/PST CaK/ART285

No time....always bloomin cloudy...need to build the Obsy..

 

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