Saturday, February 28, 2015

Holding Pattern -Thoughts on the Coming Season



The winter of 2014-15 here in Maine has been the snowiest in a few years, akin to the 2010-11 season.  If that isn't enough to cancel imaging plans, February is going into the record books as the coldest recorded !  


Flanders Pond Observatory on The Last Day of February 
I've traded hobbies for the last month or so, swapping out the camera for a snow shovel.  Not much fun of course, but a break in the action gives one time to reflect on the upcoming season and the body of work to work on.  

The old observatory has seen better days and this spring will be a time for repairs.  The moist location has taken its toll since it's construction in 2003.  The floor and walls are needing attention, the roof however is good as the day it was built and can hold a good snow load and still slide with relative ease.

Imaging plans will include a fresh look at Sharpless 2-27 in Ophiuchus with an experimental technique for enhancing the capture of this very faint nebula. It is rarely imaged by any means and the combination of red sensitive color emulsion, proper filtering and clear dark skies will bring success.

Sharpless 2-27 in Ophiuchus

The emission nebula Sh2-27 is centered on the young zeta Ophiuchi, a runaway star.  This O type star excites the interstellar medium revealing the "bright" nebula.  The nebula itself is huge and if one could see it with the unaided eye would span 20 full Moon diameters!  Wide-field optics are necessary, even a small telescope cannot capture it in its entirety.  The image above was taken with a portrait lens looking just above the center halo of our Milky Way galaxy.

It is a challenging object to image.  It has a low declination and even natural sky brightness cloaks it from unfiltered cameras.  It usually shows up as a rather large and faint indistinctive patch of light on red sensitive film or astro modded DSLR's.  It came to my attention 10 years ago when imaging with a simple 35mm camera and 50mm lens.

Watch this blog for more information on Sharpless 2-27.  I'm hoping to best my results from 2008 and a full write up on this interesting object.










Sunday, January 11, 2015

Comet Lovejoy and a Close Planetary Conjunction

As the weekend kicked into gear Friday night, two thought were on my mind.  The first was the close conjunction of Venus and Mercury, the second was of C/2014 Q2 Lovejoy.   I dedicated Friday night to some trial images of comet Lovejoy.  The comet was speeding north into Taurus and brightening nicely.  The Moon was well past full allowing dark skies for the next two weeks.  Now was the time to strongly consider imaging our recent visitor and take in the sights as well.

Images taken Friday night with the SMC 67 200mm f/4 lens and Pentax K-5IIs were decent, but the comet remained small unless cropped heavily.  It is winter in Maine and the cold had gotten the best of me, so I planned to shoot again Saturday night with the 400 F/4 SMC Takumar.

Prior to imaging comet Lovejoy Saturday night I anticipated the close conjunction of Venus and Mercury. This night they would be at their closest, within 0.7 degrees of each other.  Because my western horizon is blocked by trees I decided to drive down to Sorrento Harbor for a clear and more scenic setting.


Looking west at Sorrento Harbor


Like a pair of jewels, Venus and Mercury adorn the western sky

Watching the tandem planets as dusk deepened was incredible.  A cosmic perspective in an otherwise ordinary earthly scene.  I would have loved to watch the planetary pair sink to the horizon, but the cold air hastened my departure.  I took in one last view before packing it in.



I took a break for dinner once arriving home.  Skies were brilliantly clear and comet Lovejoy, obvious to the unaided eye was also noticeably higher than the previous night.  I managed to get the camera and lens arrangement mounted in short order.  After a few test exposures for framing and focus, I shut off the camera and went inside to warm up and the camera to cool down.  Once I had warmed up, it was time to take some images.


C/2014 Q2 Lovejoy


I spent about an hour performing about a dozen images.  While guiding one image I saw a satellite pass my field of view in the guiding eyepiece.  After reviewing the image I was delighted to find it had  passed right straight into the comets tail and through the center of the coma!  It felt like one of those Heaven's Gate Hale-Bopp moments.  Thoughts of posting the image on crank websites filled my mind for a moment, but I know there are people that amazingly take that stuff seriously. The thought of people taking their own lives influenced by such an image sobered me.  

Ultimately, the next to last image was the keeper from the night's session.  The stars are trailed as I had guided on the coma for the six minute exposure with the 400 at f/6.7 and ISO 1600.

Lovejoy is not an extravagant comet, indeed it reminded me of periodic comet Halley in it's 1986 appearance, but it is nice to see a decent comet show up in an easy see location in the sky.  








Friday, January 2, 2015

Happy New Year



Oh to get out of bed in the morning.  It's cold outside.  It's twilight time - dawn upon the new year. Get the Keurig going and try to find some clothes in the dark without waking the spouse.   It's actually not too bad, 20's this morning and no wind.  Nice!  I can see some clouds out the living room window to the southwest drifting east, might be worth a quick trip to the pond after all.  One cup of coffee down, grab the camera bag and out the door.

A week ago the pond was completely open and not one trace of ice, the recent cold snap should have created a nice layer by now.  Flanders Pond is just north of my home and in about five minutes trekking along a camp road we arrive.   There is ice!  It's smooth too!  About an inch or so thick.  I check it with a light step.  No problem.  The sky is brightening and high clouds to the east are illuminating with golden light.  

I reach inside the bag and get the K-5 and compose about a dozen different shots as the sky changes. I'm awestruck!   Within ten minutes, the magic moment arrives.  

Yea this was definitely better than wasting the dawn on my second cup and the news on the tube.



Sunrise Upon The New Year

Happy new year.  May you all get to lose some sleep and be glad you did.

JC

Saturday, July 26, 2014

Selected Regions of The Milky Way

In my previous post I wrote of my project to photograph selected areas of the Milky Way based on the original idea that Edward Emerson Barnard proposed and implemented on the summit of Mount Wilson in 1905.

I am glad to say that the first round was successful.  I spent several hours shooting the Milky Way from my home in Maine during the dark hours of  June 21st through July 1st.  I lost much sleep and had a few difficult days at work due to the late hour required on these summer evenings / mornings. In the end it was worth it.

I performed several test frames to get perfect infinity focus then dove into the lonely hours of exposing and guiding.  Dodging mosquitoes to my person and fireflies from the exposing film, it was a feat of labor and determination.  The frames below are the fruit of those labors.

Of technical note, all exposures ran about 40-50 minutes at apertures of f/4.8 and f/5.6.  A Tiffen Haze filter was installed in the tail end filter holder on the 400mm f/4 SMC Takumar to reduce the secondary spectrum common on these conventional glass lenses.  Exposures with and without the filter was dramatic.  Star images were much tighter even though overall the filter may reduce contrast and overall sharpness.  Some reflections were noted but were rather minor.  Fuji Neopan Acros was used for image acquisition.  Chosen due to its exemplary reciprocity characteristics and fine grain.  The films were custom processed in Xtol developer by Color Services in Needham Massachusetts.

Post processing was done by converting the original negatives to digital files via an Epson V600 scanner.  Adjustments to levels and curves were completed with Adobe Photoshop.



This image portrays the individual frames below against the wider field



Messier 22 Region in Sagittarius


The Scutum Star Cloud



The Small Sagittarius Star Cloud



The Dark Nebulae in Ophiuchus


The Great Sagittarius Star Cloud

The Dark Lanes in Ophiuchus


The Southern Scutum Star Cloud

There were a few more images but I have yet to work them up for posting.  So happy to be able to share the results with you and produce at least one more time a portfolio of images captured by traditional means.  The time spent under the stars, manually correcting the guiding along the way and taking in the quiet nights allowed me to capture, albeit imperfectly, the spirit of the great E.E. Barnard.  











Friday, July 4, 2014

Recapturing E.E. Barnard's Legacy



The Father of Milky Way photography, Edward Emerson Barnard systematically photographed the Milky Way on what was the yet to be developed Mount Wilson in 1905.  The images taken that year were to be published in A Photographic Atlas of Selected Regions of The Milky Way.  This seminal work was a reference for decades and still provides inspiration to wide-field astrophotographers today.

Barnard recalls how the project got started.

"Through the interest and courtesy of Professor George E. Hale and the generosity of Mr. John D.
Hooker, of Los Angeles, I spent the spring and summer of 1905 in photographic work at the Solar Observatory of the Carnegie Institution on Mount Wilson, California. Mr. Hooker’s generous grant
made it possible to transport the Bruce telescope to Mount Wilson, where it was installed from
February until September, 1905, in a temporary wooden structure, from which the roof could be slid
off, giving an unbroken view of the sky. The altitude of the station was about 5,900 feet, above the
sea, and its latitude 34°13 .  The main object of this expedition to Mount Wilson wasto secure
the best possible photographs of the Milky Way as far south as the latitude would permit."

The Bruce Observatory with roll-off roof  featuring the 10" Photographic Telescope in 1905.

University of Chicago Photographic Archive, [ apf6-01621r], Special Collections Research Center, University of Chicago Library.

The photographic instrument was four instruments in one.  The 10-inch and 6.25-inch photographic telescopes, and a 3.5 -inch doublet and lantern lens as well as a guiding telescope. First exposures began on January 27th and ended in September of that same year, 1905.  Barnard spent almost the whole period on the mountain, except on one occasion to go into town to obtain the services of a notary and barber.   Barnard was famous for being a workaholic at the telescope, possibly due to his drive to be the second to none in his capabilities.  Long gone were his childhood days of poverty and the opportunity to be the best was not wasted.

Barnard at the helm of the Bruce instrument.

University of Chicago Photographic Archive, apf6-04469r, Special Collections Research Center, University of Chicago Library.





Plate 27- The Great Sagittarius Star Cloud 

July 6.815 1905
3 Hour 58 Minute exposure
Barnard's exposures of the Milky Way typically lasted 4 to 5 hours.  Barnard would correct the instruments guiding as the cameras panned across the open landscape counteracting the earth's motion.  The long hours of photography "Would have horrified any medical man" Walter S. Adams recalled in his recollection of Barnard's sleepless nights, "Sleep he considered a sheer waste of time, and for long intervals would forget it altogether. After observing until midnight, he would drink a large quantity of coffee, work the remainder of the night, develop his photographs, and then join the solar observers at breakfast. The morning he would spend in washing his plates, which was done by successive changes of water, since running water was not yet available. On rare occasions he would take a nap in the afternoon, but usually he would spend the time around his telescope. He liked to sing, although far from gifted in the art, but reserved his singing for times when he was feeling particularly cheerful. Accordingly, when we at the Monastery heard various doleful sounds coming down the slope from the direction of the Bruce telescope, we knew that everything was going well and that the seeing was good."

My admiration of Barnard's work hearkens back to my younger days when I was starting out in astrophotography.  Those then famous black and white images of the Milky Way were the stuff of dreams to a young astronomer wanting to explore the night sky.  It seemed any photographic reference to the Milky Way's structure turned to Barnard's work as they were still the standard reference on the subject, in spite of other surveys such as POSS and POSS-II being more recent but much narrower photographic fields.

Fast forward to 2014.  How was I to symbolically and in a very real way reproduce some of Barnard's efforts?  In 2011, I performed some tests with Fuji Acros, a black and white negative film that has the best reciprocity characteristics of any film in history.  It showed itself to be very capable of long exposure work, but lacked the red sensitivity often desired for astronomical use.  The lack of red sensitivity does not hinder star cloud and dark nebulae photography however.  I performed many successful exposures with various focal length lenses, with the 200mm and 300mm focal length lens coming close to the Barnard photos in field size and depth, but I would get much closer and a similar field size with a 400mm lens.

Guiding analog cameras under a dark sky and monitoring the guide star in a double cross-hair reticle eyepiece, making small corrections in the clock drive and for atmospherics reflects similarly what Barnard used for techniques.  Manual guiding is something that adds to the experience as the pioneers such as Barnard used this laborious technique to get the job done.  Making these images is so much more than shooting film to replicate the historical work, but the experiences under the night using very basic technology.

Further testing in 2012 revealed remarkable image capability of medium format film and camera system.


Messier 8 Region @ 200mm

Southern Ophiuchus @ 200mm

The Scutum Star Cloud @ 200mm

The 400mm f/4 medium format lens produces a similar field size (8x10 degrees) to Mount Wilson's Bruce Photographic Telescope.  I was not to use glass plates 14x18 inches like the Bruce instrument used, but a relatively small piece of photographic film 2.25 x 2.75 inches in size.

In June of 2014, I had acquired and mounted such a lens for the project.  The 400mm f/4 Super-Multi-Coated TAKUMAR for the Pentax 67 was dubbed, the "Mini-Bruce". 

The 400mm f/4 "Mini-Bruce" Astrograph rides atop my classic 8" Meade


I built a personal observatory, much like Barnard's 1905 Mount Wilson setup in 2003.  It has good exposure to the southern sky, despite my 44.5 degree north Latitude. This gives me access to most of the sky Barnard had.  Flanders Pond Observatory has been a useful photo-visual laboratory.  Its showing its age and will be needing maintenance of replacement soon.  If I can get just a few more years out of it!

Inside the roll off roof, the "Mini-Bruce" ready for action on a clear dark night.

The summer weather will determine just how successful this project turns out to be.  I am hopeful.  To fall in the footsteps of the master is a privilege.  I would so love to have met Mr. Barnard.  His story and images have been an inspiration for many but, I consider myself to be the number one fan of the man from Tennessee.



Permissions for reproduction of images of Plate 27 as follows: 

Georgia Institute of Technology Library and Information Center, Great Star Clouds in Sagittarius - 2, Plate 27, Edward Emerson Barnard's Photographic Atlas of Selected Regions of the Milky Way, June 2004, Georgia Institute of Technology, June 14, 2014 http://www.library.gatech.edu/Barnard_Project_W/PDF/plate27.pdf

Sunday, June 8, 2014

Analog and Digital: A Truce

My brief flirtation with digital has gained me perspective on image acquisition and overall acceptance of what each method has to offer.  Digital is seductive, an easy path, and perhaps the best method for image capture. Analog astrophotography is all but dead with very few practitioners, and perhaps justifiably so,  but the subtle, aesthetic qualities of film keep me coming back to that medium.

Analog astrophotography in the 21st Century is as good as it ever was if you had the presence of mind to store the proper emulsions while they were still available, but the clock is ticking on frozen stocks as they will still be limited to about ten years, more so if using silver based products. Presently available materials such as Fuji Acros will be around awhile yet, but the rug on this fine film could be pulled anytime.

Folks see digital work coming from my photostream and wonder if even I too have given up on the craft.  My work will use the two technologies suited to their strengths.  Digital offers mastery of brief exposures at high ISO, film offers mastery over very long single exposures at low ISO materials given medium and large formats.  Digital RAW files give unprecedented flexibility in image editing.  Analog is less forgiving; you must nail it the first time.  For the experienced analog photographer, this is not a problem.

So why film?  For me it is simple.  I grew up with film, love it's aesthetic, and the process.  My negatives and positives contain captured starlight.  In a very real way, a literal way.  It's photo-chemical.  There is an original image.  This is a powerful difference to me.  A file of one's and zero's is symbolically captured starlight, it's signature only.  Being able to go back to the original in tangible form is without equal, as imperfect as it may be.

There is room for both. When making art, I prefer film.  For documentary work, digital is no question, the best. Digital mavens declare analog photographers as almost religious zealots and Luddites.  Fair enough.  I believe we feel strongly about our craft, a craft that was suddenly (within the last twenty years) replaced with a whole different process.  Gone, were the darkrooms, the smelly chemicals, the boxes of negatives, the slideshows.

Being a hybrid photographer, this allows me the best of both worlds - film exposures and digital scans.  Originals with many of the digital workflow advantages.  The more accurate the exposure on film (even if it is for hours), the less "noise" it contains, the only noise is from the scanning process. Here, the limiting factor of film is in the scanning process, as it seems something is always lost here.

For stop action Milky Way landscapes, it's digital all the way.  For majestic Milky Way wide-field photography, certainly film provides my medium of choice.

The vistas of the Northern Milky Way on analog materials














Sunday, May 25, 2014

Airglow

The recent buzz of a possible great meteor shower Friday night / Saturday morning kept us all in anticipation of clear skies. It did not look good, but eastern Maine, specifically coastal Hancock County enjoyed clear skies all night long. The question was then whether the shower would pan out.

Early on I spotted what appeared to be a brilliant meteor exiting the constellation Camelopardalis. The night looked promising. The time since that 10 o'clock hour produced nary a trace of any members of the Camelopardalids. The night had a lack of meteors in general.

The dark and starry night still had gems to behold and one phenomena in general was putting on a decent show. Green colored airglow is the result of oxygen atoms roughly 60 miles high in the extreme upper atmosphere excited by ultraviolet radiation during the daytime.   The glow can be seen by astronauts in Earth's orbit and by stargazers with keen vision under dark skies.

Below is an example of green airglow and the Milky Way early Saturday morning as revealed by long exposure photography.

I noted it visually.  It appeared as large pale white patches of light against a darker sky. The camera sees the green light, but human eyes cannot detect color in such low light conditions as the rods, responsible for night vision do not detect color.

So dark skies are not always dark, indeed the whole front yard of my home seemed "bright".  My Sky Quality Meter read 21.6 Mags/Sq-Arc-sec, that's pretty dark.  The Milky Way was well structured and the dark nebulae in Ophiuchus were not a challenge at all.

These "bright nights" commonly occur during high solar activity, so visual and photographic observations in the coming Solar Minima will enjoy darker skies, a few years away, but it's not too early to start planning.


Airglow veils the Milky Way