Jump to content


Photo

Herschel Wedge

  • Please log in to reply
14 replies to this topic

#1 MAURITS

MAURITS

    Apollo

  • -----
  • Posts: 1018
  • Joined: 22 Sep 2009
  • Loc: Belgium

Posted 04 January 2013 - 10:24 AM

Can I use a Herschel Wedge for general "night time" viewing?

Thanks! :waytogo:

#2 dan_h

dan_h

    Surveyor 1

  • -----
  • Posts: 1966
  • Joined: 10 Dec 2007

Posted 04 January 2013 - 10:31 AM

No.

No, for general viewing, the wedge will significantly reduce brightness as it is designed to attenuate the light for solar observing. All but the very brightess of nighttime targets will complete disappear from view.

Yes, some have reported that it is the ideal lunar filter and eliminates moon-blindness adding to the comfort of lunar observing when using larger aperatures.

dan

#3 Astrojensen

Astrojensen

    Fly Me to the Moon

  • *****
  • Posts: 5117
  • Joined: 05 Oct 2008
  • Loc: Bornholm, Denmark

Posted 04 January 2013 - 10:37 AM

What? Why? What would the purpose of dimming the views by 95% be???? They can be used when looking at Venus in a mid-size telescope, but then you'll have to cover the back, so that false light doesn't leak into the prism. And you don't want to use additional filters as well, of course, or else you'll see absolutely nothing.


Clear skies!
Thomas, Denmark

#4 zippeee

zippeee

    Ranger 4

  • -----
  • Posts: 332
  • Joined: 27 Dec 2010
  • Loc: Alberta, Canada

Posted 05 January 2013 - 01:03 AM

I use my wedge for lunar observing all the time, it works very well.

#5 DaveJ

DaveJ

    Surveyor 1

  • *****
  • Posts: 1697
  • Joined: 07 Jan 2005
  • Loc: NE Ohio

Posted 05 January 2013 - 10:18 AM

I use my wedge for lunar observing all the time, it works very well.


I do the same, but there is one giant caveat...the ND3 filter must be *removed* for lunar viewing and *REPLACED* before using the Herschel Wedge for its intended purpose: solar observing. I'm told the the recent Lunt versions have an un-removable ND3 filter which makes lunar observing impossible. The Baader version, which I have, is not a problem in that regard.

#6 MAURITS

MAURITS

    Apollo

  • -----
  • Posts: 1018
  • Joined: 22 Sep 2009
  • Loc: Belgium

Posted 05 January 2013 - 02:31 PM

Indeed, the Lunt versions have an un-removable ND3 filter!

Thanks all for the answers.....

#7 Mark9473

Mark9473

    Cosmos

  • *****
  • Posts: 8606
  • Joined: 21 Jul 2005
  • Loc: 51°N 4°E

Posted 05 January 2013 - 03:42 PM

Indeed, the Lunt versions have an un-removable ND3 filter!

Mine doesn't.

#8 GUNER

GUNER

    Throw Me A Clue Here

  • *****
  • Posts: 2004
  • Joined: 19 Jul 2004
  • Loc: Bedminster,NJ USA

Posted 05 January 2013 - 10:07 PM

Indeed, the Lunt versions have an un-removable ND3 filter!

Mine doesn't.

Some of the first Lunt's you could remove the filter the new version you can't.

#9 MAURITS

MAURITS

    Apollo

  • -----
  • Posts: 1018
  • Joined: 22 Sep 2009
  • Loc: Belgium

Posted 06 January 2013 - 05:43 AM

Thank you GUNER for the explanation!

#10 GUNER

GUNER

    Throw Me A Clue Here

  • *****
  • Posts: 2004
  • Joined: 19 Jul 2004
  • Loc: Bedminster,NJ USA

Posted 06 January 2013 - 04:50 PM

Your wecome Maurits. I think it was a liability concern with making the new ones non-removeable.
I have an older one & highly recommend them the Sun looks great with it. I have not tried it with the filter removed on the Moon but everyone I talked too said it also works great for that.
They come up for sale used evey so often so if your thinking about gettig one I'd try to get one the lets you remove the filter.

#11 Mark9473

Mark9473

    Cosmos

  • *****
  • Posts: 8606
  • Joined: 21 Jul 2005
  • Loc: 51°N 4°E

Posted 06 January 2013 - 05:06 PM

Some of the first Lunt's you could remove the filter the new version you can't.

How recent is this? When I bought my Lunt in 2011 I and a few others complained here on CN that it wasn't possible to thread an ND filter into the bottom of the eyepiece holder when this was unscrewed from the diagonal. As a result a new Lunt prism was annoucned in December 2011 which has the correct thread at the bottom of the eyepiece holder to screw in an ND filter. Are you saying there is a further evolution where the eyepiece holder cannot be unscrewed anymore and/or the filter cannot be taken out from the bottom of the eyepiece holder?

I would like to know for sure as I've been thinking of upgrading my Lunt.

#12 Ain Soph Aur

Ain Soph Aur

    Viking 1

  • *****
  • Posts: 708
  • Joined: 10 Aug 2011
  • Loc: West Tennessee

Posted 07 January 2013 - 04:40 PM

I use my wedge for lunar observing all the time, it works very well.


Hmmm. I have the Baader Herschel. I'll have to remove the ND3.0 filter and give this a try!

#13 GUNER

GUNER

    Throw Me A Clue Here

  • *****
  • Posts: 2004
  • Joined: 19 Jul 2004
  • Loc: Bedminster,NJ USA

Posted 07 January 2013 - 07:00 PM

I bought my wedge from Markus Ludes at NEAF last year. His was an older model. When I was picking it up he was not there so I got it from Rikki Hocking at the Lunt booth right next to Markus. She said that it was a good buy & that you can still remove the filter to view the Moon. She then said that with the new wedges you would not be able to remove the ND filter to use the wedge to view the Moon. I don't see anything about it on their website but if you are thinking of upgrading I'd about them about it.

#14 Mark9473

Mark9473

    Cosmos

  • *****
  • Posts: 8606
  • Joined: 21 Jul 2005
  • Loc: 51°N 4°E

Posted 08 January 2013 - 01:42 PM

Thanks for the info, Thomas.

#15 Ain Soph Aur

Ain Soph Aur

    Viking 1

  • *****
  • Posts: 708
  • Joined: 10 Aug 2011
  • Loc: West Tennessee

Posted 09 January 2013 - 02:16 PM

I can't help but now wonder the Baader Herschel wedge (without the ND3.0) would fare on Venus.






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics