#1  
Old 31-01-2019, 03:54 PM
Saturnine (Jeff)
Registered User

Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 723
Solar filters

Hi Guys
This is a question for the solar observers out there, though i think I already know the answer. Is the DayStar ERF compatible with PST mods, my guess being that they are basically the same as Baader ERF and others, in being an 35 nm Ha broadband filter.
I ask because I see that OPT in the USA have some quite tasty pricing on the DayStars at the moment but is interesting that the 105 is cheaper than the 100 and the 90, maybe a typo.

Cheers
Reply With Quote
  #2  
Old 31-01-2019, 04:21 PM
Marke's Avatar
Marke (Mark)
Registered User

Marke is offline
 
Join Date: Nov 2009
Location: Sydney
Posts: 1,184
Daystar ERF are just basically coloured glass more or less but they work and my understanding is the Baader is much better optical glass but expensive as you have to factor in the holder as well.
I read a comparison somewhere and the difference visually was the Baader images were noticeably better.
Reply With Quote
  #3  
Old 31-01-2019, 10:35 PM
Saturnine (Jeff)
Registered User

Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 723
Thanks for the feedback Mark, I already have an 90mm Baader ERF and am wondering if a step up in aperture is worth it using an DayStar ERF. Machining the cell is not a problem for me, made the one for the Baader with the help of a friends lathe.
Actually just checked the price of the 110 Baader from Teleskop Express and it is probably a bit cheaper than the DayStar anyway if I decide to upgrade.
Reply With Quote
  #4  
Old 31-01-2019, 10:54 PM
Marke's Avatar
Marke (Mark)
Registered User

Marke is offline
 
Join Date: Nov 2009
Location: Sydney
Posts: 1,184
The TS Baader does not include the mounting frame just the glass so if you can make the holder it will work out a bit more cost effective
Reply With Quote
  #5  
Old 31-01-2019, 10:57 PM
Merlin66's Avatar
Merlin66 (Ken)
Spectroscopy Wizard

Merlin66 is offline
 
Join Date: Oct 2005
Location: St Leonards, Vic
Posts: 6,772
Jeff, I haven't seen the full transmission specs for the Daystar ERF, but I'd be surprised if they only have a 35nm bandwidth.....
http://www.icstars.com/Store/daystar...l-and-cap.html

Last edited by Merlin66; 31-01-2019 at 10:59 PM. Reason: info added
Reply With Quote
  #6  
Old 01-02-2019, 12:41 AM
Saturnine (Jeff)
Registered User

Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 723
Thanks again guys, the DayStar is probably fine quality and is a little cheaper than the Baader but with the known quality of the Baader I would probably go with it when and if I were to go ahead with upsizing. It is hard to find much in the way of specs on the ERFs', possibly protecting against cheap clones. Any market out there for an 90mm ERF.

Cheers
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 11:42 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
SkyWatcher Australia
Advertisement
Meade Australia
Advertisement
Lunatico Astronomical
Advertisement
Nitecore
Advertisement
OzScopes Authorised Dealer
Advertisement
Bintel
Advertisement
NexDome Observatories
Advertisement
Astronomy and Electronics Centre
Advertisement