Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Eyepiece sun filters show up on Ebay

  • Please log in to reply
13 replies to this topic

#1 RichA

RichA

    Apollo

  • *****
  • topic starter
  • Posts: 1031
  • Joined: 03 Jun 2010
  • Loc: Toronto, Canada

Posted 25 April 2019 - 01:24 AM

Looks and is marked as one, but in the description they describe it as a black moon filter.  I'd say it's a sun filter.

 

https://www.ebay.com...nUAAOSwmUFb~84K

 

 



#2 Jim Waters

Jim Waters

    Mercury-Atlas

  • *****
  • Posts: 2607
  • Joined: 21 Oct 2007
  • Loc: Phoenix, AZ USA

Posted 25 April 2019 - 02:10 AM

IMHO I wouldn't buy anything like this off ebay or even Amazon.  I would only purchase 'sun filters' from a known source.  Especially if your eyes are involved...!


  • JIMZ7, Procyon, faackanders2 and 1 other like this

#3 Procyon

Procyon

    Fly Me to the Moon

  • *****
  • Posts: 6415
  • Joined: 23 Feb 2009
  • Loc: Eastern Canada

Posted 25 April 2019 - 08:53 AM

Looks and is marked as one, but in the description they describe it as a black moon filter.  I'd say it's a sun filter.

 

https://www.ebay.com...nUAAOSwmUFb~84K

Run away. They should be reported.


  • Jim Waters likes this

#4 Miranda2525

Miranda2525

    Surveyor 1

  • *****
  • Posts: 1761
  • Joined: 12 Jul 2016

Posted 25 April 2019 - 01:33 PM

Been an ongoing thing... like forever...



#5 junomike

junomike

    Hubble

  • *****
  • Moderators
  • Posts: 16647
  • Joined: 07 Sep 2009
  • Loc: Ontario

Posted 26 April 2019 - 07:02 AM

Two eye's, One mistake!

I wouldn't risk it


  • JIMZ7 and Miranda2525 like this

#6 BradFran

BradFran

    Ranger 4

  • -----
  • Posts: 324
  • Joined: 12 Jul 2017
  • Loc: Mars

Posted 26 April 2019 - 07:08 AM

Nuke it from orbit...

bombdrop.gif

...it's the only way to be sure.


  • Procyon likes this

#7 Mike W.

Mike W.

    Vanguard

  • *****
  • Posts: 2222
  • Joined: 23 Dec 2016
  • Loc: Washington State

Posted 26 April 2019 - 07:12 AM

They super heat with the focused light of a scope and crack permitting unfiltered magnified sun light thru into your eye, almost instantaneous blindness, you won't know it cracked until it's too late,

 

Full aperture sun filters are the only safe inexpensive way to view the sun, inexpensive as in less than $500


Edited by Mike W., 26 April 2019 - 07:15 AM.


#8 Vondragonnoggin

Vondragonnoggin

    Cosmos

  • *****
  • Posts: 8619
  • Joined: 21 Feb 2010
  • Loc: Southern CA, USA

Posted 26 April 2019 - 07:18 AM

I thought they wup pefctly sape 

 

oh, hangon, my Braille translator is on the fritz again....

 

I thought they were perfectly safe.



#9 JIMZ7

JIMZ7

    Vanguard

  • *****
  • Posts: 2012
  • Joined: 22 Oct 2005
  • Loc: Direct flight path of DTW

Posted 26 April 2019 - 07:19 AM

I have a hard time even thinking of looking thru a scope with a Sun/ solar filter. I had a mishap one time with the Sun that forced me to see a eye doctor. That was enough for me think twice on how I should observe in the future.

Jim



#10 Procyon

Procyon

    Fly Me to the Moon

  • *****
  • Posts: 6415
  • Joined: 23 Feb 2009
  • Loc: Eastern Canada

Posted 26 April 2019 - 07:27 AM

Nuke it from orbit...
bombdrop.gif
...it's the only way to be sure.


Don't forget the nerve gas lol.

#11 spacemunkee

spacemunkee

    Vanguard

  • -----
  • Posts: 2252
  • Joined: 22 Oct 2017
  • Loc: Cincinnati, Ohio

Posted 26 April 2019 - 07:35 AM

Of course straight outta China..

Like the description though.
Can prevent dazzling, and has extra sharpness!

But yeah id give them a heads up to shut it down.

#12 AxelB

AxelB

    Apollo

  • -----
  • Posts: 1418
  • Joined: 22 Mar 2015

Posted 26 April 2019 - 07:45 AM

A framed Baader astrosolar filter is less than 200 (price vary with size) It’s really not that expensive to provide a safe way to observe the sun.

#13 Mike W.

Mike W.

    Vanguard

  • *****
  • Posts: 2222
  • Joined: 23 Dec 2016
  • Loc: Washington State

Posted 26 April 2019 - 07:51 AM

here's the thread to read, complete with pics of the filters 

 

https://www.cloudyni...ce-sun-filters/



#14 Chuck Hards

Chuck Hards

    You don't know Swift from Astrola

  • *****
  • Administrators
  • Posts: 24557
  • Joined: 03 May 2010

Posted 26 April 2019 - 08:14 AM

Small eyepiece-mounted solar filters are a concept from a bygone era, when they were mostly used with apertures of 2.6" inches or less.  Even then there is enough concentrated solar energy to possibly crack the glass from heat expansion.  They are not safe and should never be used.  


  • Jim Waters likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics