[Geysers] Perseids

[inezaustin at aol.com]

 Good explanation.  The scope we are using for taking pictures has a 25 inch mirror and a focal length of 125 inches.  It has it's own trailer.  We take long exposures (hours for each one) so vibration is a big problem.  Inez


 

 

-----Original Message-----
From: Bruce Jensen <bpnjensen at yahoo.com>
To: Geyser Observation Reports <geysers at lists.wallawalla.edu>
Sent: Wed, Jul 28, 2010 8:22 pm
Subject: Re: [Geysers] Perseids




It is important to remember that when viewing with a scope, the image is greatly magnified and the effect of ground borne vibrations is amplified.  I would guess that the seismic effects of some geysers would be sufficient to cause visible image effects when they are so magnified.  Think about the thumping at Doublet Pool, Sawmill or Oblong - if the scope were not isolated, it would wiggle enough to show effects at the eyepiece.

Bruce Jensen,
California, USA
~~~~~~~~~~~~~~~

"[Yellowstone] is a fabulous country, the only fabulous country; it is the one place where miracles not only happen, but where they happen all the time." ~ Thomas Wolfe

--- On Tue, 7/27/10, inezaustin at aol.com <inezaustin at aol.com> wrote:


From: inezaustin at aol.com <inezaustin at aol.com>
Subject: Re: [Geysers] Perseids
To: geysers at lists.wallawalla.edu
Date: Tuesday, July 27, 2010, 11:14 PM


When you are taking lengthy exposures and have an open aperture the vibrations in the ground from eruptions will cause the picture to blur.  Try lying your hand on the ground when an eruption begins, you can feel it.  Inez
 

 


 

 

-----Original Message-----
From: Eric Hatfield <conanvandt at yahoo.com>
To: Geyser Observation Reports <geysers at lists.wallawalla.edu>
Sent: Tue, Jul 27, 2010 5:46 pm
Subject: Re: [Geysers] Perseids



I have to ask about "wobble when eruptions happen."  Huh?  Can't imagine White Dome shaking your camera.  Please explain.
 
Sounds like great pictures, though.  I'd love to see some of these.




From: "inezaustin at aol.com" <inezaustin at aol.com>
To: geysers at lists.wallawalla.edu
Sent: Mon, July 26, 2010 2:24:14 AM
Subject: Re: [Geysers] Perseids




If you can, the best gazing is closer to White Dome, in the parking area.  Ask at the back country ranger office if you can stay after they lock the gate.  We have taken the big scope these and gotten some nice exposures, the kind that take an 1-6 hours or more each for each picture.  The wobble when the eruptions happen can be a problem, so you may want to take a thick rubber mat.  Ours is 6' x 8' and an inch thick.  You will have problems with head lights at any other basin and trees at Madison.  Another thought would be closer to Ojo Caliente, we haven't tried there, tho.  Inez






-----Original Message-----
From: Karen Webb <caros at xmission.com>
To: Geyser Observation Reports <geysers at lists.wallawalla.edu>
Sent: Sun, Jul 25, 2010 4:17 pm
Subject: [Geysers] Perseids


Wondered if there would be other gazers in the park the night/s of the Perseids, August 12 (ish). If you've seen them, anyone got a recommended location? Madison Junction? Boardwalk at Fountain? 
Karen 
 
-- Free the Tehran 7 
http://iran.bahai.us ;
 


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