Fw: [SWR] New Carlsbad Caverns stamp :

[Lynda & James Sánchez]

fyi  las

 

From: Jerry

Sent: Saturday, April 09, 2016 9:00 AM

To: s...@caver.net ; swrc...@googlegroups.com

Subject: [SWR] New Carlsbad Caverns stamp :

 

Here is the URL for the new SWR Cavers
https://groups.google.com/forum/#!forum/swrcavers

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• Stamp Highlights New Mexico’s Carlsbad Caverns National Park

WASHINGTON, D.C. — A dramatic photograph of the interior of Carlsbad Caverns was previewed today as the fifth of 16 Forever Stamp images to be revealed over a three-week period to celebrate the National Park Service’s 100th anniversary.

The stamp image is a photograph by Richard McGuire of the interior of the caverns. High ancient sea ledges, deep rocky canyons, flowering cacti and desert wildlife are all treasures above and below the Chihuahuan Desert ground. Carlsbad Cavern is one of more than 300 limestone caves in a fossil reef laid down by an inland sea 240 million to 280 million years ago. Visit this link for more information.

Other National Park Forever Stamps previewed to date include Acadia National Park and Arches National Park, Assateague Island National Seashore and Bandelier National Monument.

The June 2 first-day-of-issue ceremony for the National Parks Forever Stamps pane will take place at New York City’s Javits Center at 11 a.m. as part of World Stamp Show-NY 2016. Dedication ceremonies will also take place at or near each of the National Parks depicted on the stamps. Individuals are asked to spread the news on social media by using the hashtags #NPSStamps, #FindYourPark and #NPS100.

World Stamp Show-NY 2016 is May 28–June 4. Held only once a decade, this mega event is not to be missed by beginners through advanced stamp collectors alike. There will be something for everyone there, no matter what you collect. Stamp collecting is a hobby for a lifetime. No matter what your specialty, you’ll find it at the show.

The Postal Service receives no tax dollars for operating expenses and relies on the sale of postage, products and services to fund its operations.

Jerry Atkinson

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[Lynda & James Sánchez]

Well, look at the one for Bandelier. It is about the same as this CArlsbad
one. While it is great NM is represented twice, I think those who dealt
with this decision must have been desk jockeys who never stepped west of the
Mississippi. So far, I am very disappointed. las

-----Original Message-----
From: Diana Tomchick
Sent: Saturday, April 09, 2016 11:47 AM
To: swrc...@googlegroups.com ; Cave Tex
Subject: Re: [SWR CAVERS] New Carlsbad Caverns stamp :

I guess it was an artistic decision, but it’s too bad that the photo that
was chosen for this stamp looks so lurid—I’ve never seen Carlsbad lit up
with so many non-natural colors. See the photo at this link:

http://www.ny2016.org/images/parks-carlesbad.pdf

Diana

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Diana R. Tomchick
Professor
Departments of Biophysics and Biochemistry
University of Texas Southwestern Medical Center
5323 Harry Hines Blvd.
Rm. ND10.214A
Dallas, TX 75390-8816
Diana.T...@UTSouthwestern.edu
(214) 645-6383 (phone)
(214) 645-6353 (fax)

> On Apr 9, 2016, at 10:00 AM, 'Jerry' via Southwestern Cavers of the
> National Speleological Society <swrc...@googlegroups.com> wrote:
>
> • Stamp Highlights New Mexico’s Carlsbad Caverns National Park

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[larry henderson]

With the older bulbs, as they tended to change color as they aged and needed
to be replaced. With the brand new lighting system using LED the color
should be maintained through the life of the bulb. Visitors to the Cave
these days will see so much more than any visitors before because of the
newly installed lighting system. LH

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[Lynda & James Sánchez]

From Peter Jones a noted cave photographer.  Very interesting info. and explanation about the weird colors.

 

las

 

From: Peter Jones

Sent: Saturday, April 09, 2016 2:42 PM

To: Lee Skinner

Cc: mailto:swrc...@googlegroups.com

Subject: Re: [SWR CAVERS] New Carlsbad Caverns stamp :

 

Having photographed much of Carlsbad over the years, along with a three week shoot for the Park back in 2003, I can attest that the photo they chose made use of the older lighting system in the cave.  I know because I have many similar photos I’ve taken using the in-cave lighting.  Over the many years that Carlsbad has been electrically lit, they generally replaced older lights with whatever seemed to be the best, most efficient and cheapest lighting they could find at the time it was replaced.  This meant that some of it was incandescent, some of it fluorescent with its many different shades of blue-green, depending upon the bulbs they chose, a mercury vapor lamp that gives everything a green cast, a soda vapor light which is orange-ish and several others which I don’t know about.  All of them offered something akin to “white” light for the cave.  However, that “white" light appeared to be white due to the forgiving nature of our eyes and our brain that processes that light information.  Cameras, on the other hand, are not so forgiving in their capture.  You’ve all heard about the proper “white balance” settings in your camera.  They usually have names such as sunlight, flash, overcast, shaded sunlight, fluorescent, incandescent, etc.  These settings are there to help make the color of your image reflect the color of the light source that was used to illuminate the image.

 

Each light source gives a different version of potential color imbalance.  Light is sometimes measured by what is called its Kelvin (K) Temperature.  The K temperature refers to the color of light by heating a black body source (a piece of black iron, for instance) to that temperature and measuring its light output and therefore the color from it.  Overhead sunlight is usually a K temperature of 6500.  Electronic flashes are around 5500K. A candle has a K temp of 1850.  An incandescent bulb is around 2400 - 2550.  Fluorescent bulbs vary quite bit depending on how they are made (soft white, warm white, tubular fluorescent, etc).  In addition, some lights tend to have a color peak that overemphasizes a certain portion of the color spectrum, usually bluish-green in nature.  Cavers will certainly recognize the bluish cast that their LED headlamps give out when they see a photograph of their lamps on.

 

The photo we see on the stamp that we’re all wondering about was taken using the light sources that were already there.  The green cast is due to the fluorescent bulb on the right hand side.  The light source from the left side is likely some variation of an incandescent bulb and is thus a warm orange-ish color.  Notice how the shadows to the right of the tall stal in the middle of the image suddenly become green.  That’s because the strong incandescent bulb on the left hand side doesn’t reflect back on the right hand side of the formation.  Also note how the orange color is strongest on the far left and grades over to green along the ceiling the closer it gets to the green light source.

 

In reality, there are only a couple of small areas where the true color of the formations shows up and that’s at the lower left hand side of the big stal in the middle.  One of the unfortunate things about my three weeks of shooting in C’bad in 2003 is that the studio flashes I was using show the cave in its true color.  In many places that color was a grey-ish hue.  I hate to say it, but that grey color comes from all the dust that has settled on the formations when they were blasting the elevator shafts and dumping the dust and debris in the now excavated areas of the Big Room.  They were most likely a beautiful bright white color when Jim White first entered the area.  Now, they are the sad reminder of what happened to the cave due to our own endless visitation to it over the past 80 or more years.

 

Unfortunately, many people will like the “colored lights” that appear to be in this photo and will be wondering why the colored lights aren’t turned on when they actually do come to see Carlsbad.  I have yet to see the new lighting in the cave that in theory, at least, will be fairly uniform in its color cast, providing it has all been done with the same LED light sources.  I know Rod Horrocks put a lot of time and energy into the new lighting, so I am anxious to see the results.  It has certainly been a long time coming.

 

I hope that at least explains the reason that the colors are so bizarre in the image.  We’ll just have to all grit our teeth and try to explain why it is what it is when people ask us about it.

 

Peter

 

The cave’s true color, this being taken from the left hand side of the big stal in the stamp image:

A quick,  unprocessed jpeg version of the backside of the stals in the stamp image, color balanced for the incandescent light on the right hand side.  Note the same green that was in the stamp image, all due to the fluorescent light.  Taken from Rock of Ages location.  The muddy red-green color in the foreground is due to lack of blue color wavelength in this long exposure.

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[larry henderson]

Thanks for the wonderful explanation of the colored light effects Peter. LH

 

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