General
General
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Infinity
Everyone has an idea about infinity. Infinity always confronts us with the question of wether we can see or recognize it at all. Modern mathematics knows that infinite series of numbers may well have a finite limit. The ancient greeks had realized that Achilles will always outrun a tortoise, but they couldn’t prove it. For the solution remained hidden.
Photographing a single, well reflecting steel sphere I got on the surface pointing to my macro lens a distorted image of the surrounding. One can see the tree in our garden, the lens and the tripod of my equipment, even the photographer’s legs are visible. That’s why I think it’s sort of a selfie.
Photographic world on a steel ball © Julian Köpke Immediately, I thought of my friend Harold, who had worked a lot on photographing water drops and who had made a book about the photography of water drops. In the juxtaposition of several water drops the environment is displayed several times side by side in the drops.
Well, this happens as well, if you place two well reflecting steel balls side by side. So far, there is nothing unexpected.
On closer inspection, the opposite sides of the spheres show further images of the surroundings slightly outside the original image, well visible on the tree. These images of the tree become smaller and smaller lying within the circular image of the first reflection.
An infinite series of images in one picture is created by the reflection on the surface of two adjacent steel spheres. As the reflected images become smaller and smaller, the total area of the image is finite. A similar effect is known with water drops as well.
Close look of an infinite reflection on a steel sphere © Julian Köpke -
Snow and sunshine
It is a nice experience to walk the same path under changing light conditions at daily distance. In winter there is not much botanically happening, only the snow can be more or less – or the fog. The possibilities of imaging with a camera essentially change with the extent of the available light. A sunny day shows a maximum of available light.
Does sunlight make a picture atmospheric ? With cloudy skies or even some fog, the conditions for background and foreground change substantially and pictures without sunlight can be be very varied and gain a special depth of expression.
Sunlit snowy branches © Julian Köpke The above image shows: shadows during a day with a blue sky are blue, too.
The detection of expressive light situations without a tripod and without HDR technology requires a limited amount of light that the sensor can still process with out blown-out lights or drown depths.
Snowfall in the clearing © Julian Köpke 
Winter walk in the snowy forest © Julian Köpke -
Ups and downs
January 6th is a holiday in our region, commemorating the three holy kings or three wise men, who had been probably astronomers. The Orthodox Churches celebrate Christmas. In the United States of America, a reigning madman with his mob is degrading his country to a banana republic. Looking at this rises questions about our German history 87 years ago.
I spent the whole night absorbing the latest news. Sleeping was almost difficult if not impossible. This morning a bug in the Flickr software ? A picture of mine with so many views and favorites ? Well, that was the good surprise this morning after all: an in explore for a picture I had been thinking about for a long time and that I repeatedly failed: taking tree trunks in landscape format.
This time it worked out better than expected. Christa and I started a late walk up at Posseltslust to see some people riding sledges. We took a forest trail away from the slopes. The twilight was already advanced, the ISO high and the aperture only slightly closed. A pleasant winter light surrounded us. Between the tress it became bright, the tree trunks covered with snow below. This image got an in explore.
Tree trunks in winter near Posseltslust in Heidelberg © Julian Köpke Not far from there, I made a second attempt of the scene, which seems a bit more delicate in my eyes. I posted it two days later.
Tree trunks in winter near Posseltslust in Heidelberg © Julian Köpke Winter forest looks a it like a fairy tale to me. That is why color is also important, which additionally stimulates the imagination. Even a tree trunk presumably struck by lightning becomes a sight to behold. It works with the color even if there is only little light.
Broken tree in the forest near Posseltslust in Heidelberg © Julian Köpke At the end of the forest path, a light shines like in a cathedral, in which the faithful are moving. Is there the light at the end of the tunnel ?
Walk through the forest in winter near Posseltslust in Heidelberg © Julian Köpke -
Great Conjunction
Thanks to the hint of a friend, I was again aware of the rare constellation of the approach of the two planets that I had observed during the summer. The 21st by December, Jupiter and Saturn were to be only 6 arc minutes apart. Unfortunately, the weather forecasts are not favorable, which is why I hardly figured out a chance to see anything about it at all.
Unexpectedly, the clouds disappeared during the day to retreat th the edge of the Rhine Rifle, where we were allowed to see them in the evening. At the beginning of our photo session we watched the Rhine Valley with our bright and long reaching optics.
Power plant Mannheim © Julian Köpke 
Nightfall over Cathedral of Speyer, distant view with my spotting scope. Every now and then birds were flying through the scene. © Julian Köpke First Lorenz discovered the crescent moon in the clouds. It could have sunk our courage, in fact as darkness fell conditions steadily improved.
Waxing crescent moon, 48h after New Moon. © Julian Köpke At the time, it was still too bright to see the planets.
Waxing crescent moon, 48h old. We were watching out for the planets Jupiter and Saturn that are close by 6' these days (Great conjunction). © Julian Köpke Finally we managed to take pictures of the crescent moon with the the planets Jupiter (the brighter and bigger one of both) and Saturn close to each other before the increasingly yellow moon disappeared in the dark clouds. There was even a little of the ashen moonlight to be seen. Wonderful.
Yesterday, crescent moon right below Saturn and Jupiter © Julian Köpke -
Old Bridge Heidelberg
The Old Bridge in Heidelberg has the same attraction to visitors as the Charles Bridge in Prague or th Bridge to the Castel Sant’Angelo in Rome. Not everyone that the connective building between the two white towers houses an apartment. You come to the bridge early in the morning, you’re almost alone. This lonelyness is especially emphasized by a single walker.
Old Bridge Heidelberg overcast © Julian Köpke The morning calm is reinforced by the fog. Even the car traffic is not so loud as usual. Maybe the noise will decrease even more with electric cars. That would do us good. The view form the bridge downstream shows ships tied up on the shore. Only a few rowers are on the river with trainers whose voices hardly penetrate.
White Fleet berthed on River Neckar in Heidelberg © Julian Köpke 
Old tub on River Neckar © Julian Köpke The castle exercises the rule over the city. The strong contrast of the castle ruins over the roofs off the Old Town on the river bank is attenuated by the morning mist.
Heidelberg Castle, Old Town and River Neckar © Julian Köpke -
Heidelberg Castle
the Heidelberg Castle is world-famous and famous for the romantic feelings it triggers. Anyone who comes to the city in spring or early summer enjoys a mild warmth and a light wind that flows through the Neckar Valley.
In autumn, the winds that hits the photographer is icy cold and the facial masks that you have recently at hand are a welcome support in taking pictures. The warm colors of the following photographs deceive one of them.
Fog in the valley of river Neckar at Heidelberg (sunrise over Old Bridge). © Julian Köpke The warmth of the Neckar gives rise to considerable early mist during a cold night, which stretches over the trees to the south and west. The mists also reach the Heidelberg Castle, which subsequently appears a little more romantic and ruined.
The Heidelberg Castle in the morning mist © Julian Köpke 
The Heidelberg Castle in the morning mist © Julian Köpke -
Reflection II
Most of what we do see with our eyes is a reflection. Any light from a bouquet of flowers is just reflection. Looking through a bottle shows beside reflection some refraction. The only exception, where we don’t see reflected light is e.g. offered by an open fire or a light bulb. The sight of a star also shows direct light, which is usually subject to refraction due to the atmosphere.
Our eyes seem to absorb the light when we see. In fact, they can also reflect the incident light. We know this phenomenon from cat images that we have mistakenly photographed with a flash light.
Sitting in front of me my right eye is on the viewers left side and the left eye is on its right side. The instrument uses a red and a green laser at a harmless energy dose.
Fundus of right eye seen in red and green laser light © Julian Köpke 
Fundus of left eye seen in red and green laser light © Julian Köpke With different wave lengths of a laser an ophthalmologist is able to see different structures of the fundus and uses this property for diagnostic purposes. Looking at the green color only that stems from the green laser, the result is a monochrome image that shows vessels of the surface of the retina and smalls nerves joining the papilla.
Fundus of right eye seen in green laser light © Julian Köpke 
Fundus of left eye seen in green laser light © Julian Köpke Looking at the red channel displaying the reflections of the red laser light, monochrome images show deep vessels behind the retina.
Fundus of right eye seen in red laser light © Julian Köpke 
Fundus of left eye seen in red laser light © Julian Köpke Beside the medical point of view there is an aesthetic one, too. Dr. Gösele, to whom I owe these beautiful pictures, confirmed to me the impression of an astronomical night shot, which other viewers also feel. With a courageous crop you get there:
At a certain crop the fundus of a human eye seen in laser light resembles and emission nebula with a star in its center. © Julian Köpke This is how the central part of my sensor looks like when creating photographs or X-rays. My wife immediately urged me not to fall into a narcissistic trap ….
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Play of colors and light
In our garden is a small fountain just beneath a hedge. A remarkable number of birds showed up to drink or to take a shower in it. The urge of the birds to bathe there was always stronger than the fear of our presence. What do they see in the fountain ? I couldn’t imagine an answer until today.
Great Titmouse (Kohlmeise) © Julian Köpke 
Crow in our garden © Julian Köpke Today I made macro images of the fountain with a wide variation of exposure values to find a small world within it. Many of my fountain images remind me of the night sky and its wonders. Sometimes I had to think of our universe.
The birds might see this ? I cannot be sure. But they are not blind, for sure.
A macro of our fountain appears like a painting under many exposure conditions. A first glance of four images is presented here.
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Autumn in the castle garden of Schwetzingen
Good weather is now over. The days are getting dull. With a light haze in the sky, the sun runs a little deeper than yesterday. It gets dark noticeably earlier.
Another photographer had the same thought, to spend this day in the castle garden of Schwetzingen. And the same vision to shoot the Japanese white bridge over a pond with nice reflections.
Japanese bridge castle gardens Schwetzingen © Julian Köpke It has become autumn and the reflections in the ponds of the castle garden unfold a greater charm.
Castle gardens Schwetzingen © Julian Köpke The rest of the park is already prepared for the winter and seems inhospitable to the photographic eye.
Waiting for winter in Schwetzingen castle gardens © Julian Köpke -
Is this a photography ?
My conference schedule allowed me a walk through the Berlin Tiergarten Park in the morning. Of course, with a cam handy. While I was sitting on the shore of the Landwehr Canal, I let myself be carried away by the waves.
The waves made the reflections of the trees and bushes softly tremble. The resulting reflections became like paintings.
Reflections © Julian Köpke The processing was carried out only with regard to brightness and colors. Lab colors were used. Light-dark-contrasts were given by the waves.
