Optical
1 member found
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Rob Hadfield
Australia
202 creative works found
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Morning sunrays filter through forest, Yarra Ranges National Park, Victoria, Australia. / © Ern Mainka
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Morning forest sunrays in Yarra Ranges NP, Victoria, Australia. Tomiyama Art Panorama 6×12cm format. Fuji Velvia film. / © Copyright Ern Mainka
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Brocken Spectre and Glory 1/6/2007 near Yarra Glen, Melbourne, Victoria, Australia. © Copyright Ern Mainka / - Brocken Spectre and Glory ....The Brocken Spectre is the three dimensional shadow at the centre. It is dark air extending from the person/photographer all the way into the distance. Brocken shadows look triangular and large because of this. ....Glories (similar looking to a rainbow) form by diffraction, reflection and refraction of sunlight through water/mist droplets. Their formation involves surface waves as well as internal reflections. The number of rings and their angular extent is a function of the size distribution of the water droplets that compose clouds. With larger droplets the rings are more tightly packed. The clearer the colors appear in the fringes, the tighter the size distribution of the droplets (closer to one single size). Glories are polarized radially in the outer color fringes but tangentially in the center. / - / Brocken Spectre / A Brocken spectre (German Brockengespenst), also called Brocken bow or mountain spectre is the apparently enormously magnified shadow of an observer, when the Sun is low, cast upon the upper surfaces of clouds. If the observer is in an aeroplane, the shadow of the aeroplane is cast. The phenomenon can appear on any misty mountainside or cloud bank, but the frequent fogs and low-altitude accessibility of the Brocken, a peak in the Harz Mountains in Germany, have created a local legend. The spectre was observed and described by Johann Silberschlag in 1780, and has since been recorded often in literature about the region. The ‘Spectre’ appears when the sun shines from behind a climber who is looking down from a ridge or peak into mist. The light projects the climber’s shadow forward through the mist, often in an odd triangular shape due to perspective. The apparent magnification of size of the shadow is an optical illusion that occurs when the observer judges his shadow on relatively nearby clouds to be at the same distance as faraway land objects seen through gaps in the clouds. The shadow also falls on water droplets of varying distances from the eye, confusing depth perception. The ghost can appear to move (sometimes quite suddenly) because of the movement of the cloud layer. The head of the figure is often surrounded by the glowing halo-like rings of a glory (Heiligenschein), rings of coloured light that appear directly opposite the sun when sunlight is reflected by a cloud of uniformly-sized water droplets. / - / More images
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Pre-dawn glow with twilight blue from sky above reflecting off low lying mist, Alpine NP, Victoria, Australia. / Leica M3, Kodachrome 25 film. / © Copyright Ern Mainka
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There is a clue…. a possible rainbow thing around the shadow of my head…...can you see me yet….? I’m trying to hide my own shadow in that of the central tree, but my elbows are sticking out as i take the picture and there seems a trace of a rainbow around where my head is….. I think it might be something called a ‘brocken spectre’ (I’d just heard about this at my photography class – thanks mark!) One tentative explanation is that ‘a brocken spectre appears when a low sun is behind a climber who is looking downwards into mist….from a ridge or peak. Here is a cropped version of my next pic ‘dinghy’s here!’ as someone else (Waldo?Wally?...) was walking past… Both (unaltered) images were taken 1015am Jan 08 as we climbed out of town above the mist hanging over Peebles in scottish borders. If confirmed this could be my second ‘optical phenomenon’ already this year…. how cool is that! See ‘look up quick!’ / ps The atmospheric optics group have accepted the image which the wonderful photographer Ern Mainka confirms is a faint version of a brocken spectre ‘glory’ (the word they use to describe the kind of halo) ... Now look at his tremendous example of the real thing in full colour below (which makes me feel very humble indeed) entilted:- Brocken Spectre and Glory by Ern Mainka (press image for link to his page with fascinating details)
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Sunrays with corona colors, Dandenong Ranges NP, Victoria, Australia. Nikon F3, Fuji Velvia film. © Copyright Ern Mainka
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Taken in the Banking and Finance end of London, this curved building provided some really interesting shots. This was my favourite and I just love the way the reflection is broken or fractured so hence the title.
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Aurora Australis (or Southern Aurora) March 1990, from Queenscliff Pier, Victoria, Australia. / This aurora appeared out of the darkness unexpectedly just before driving back to Melbourne after a days outing. It’s sudden appearance grew and peaked in brightness in less than a minute and gradually diminished over about 10-15 minutes. / Nikon F3, Fuji RDP film. / © Ern Mainka
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Black Kite (Milvus migrans) and Iridescent Cloud. Composite montaged image of two photos.
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Rainbow near Bega, NSW, Australia. / Tomiyama Art Panorama 6×17cm, Fuji RDP. / © Ern Mainka
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Is it a… ?
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A close up of a Sundog (or Parhelion), sometimes called a Mock Sun. / Melbourne, Australia. / Nikon F3, 300mm lens, Fuji Velvia film. / © Ern Mainka
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A monsoonal thunderstorm looking out to sea at sunset, Darwin. A fine wispy ‘Pileus Cap’ cloud can be just seen developing atop the brightly illuminated cloud (top right). It indicates the storm has reached its peak and lightning activity starts to fade. / © Ern Mainka
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- Iridescent Altocumulus cloud about 2 hours after sunrise. When viewing this scene without the aid of sunglasses the cloud appeared a very bright white with only a faint hint of color. Only when it is dimmed considerably do the full range of colors become visible. For these images this was done by using camera exposure adjustment only. No filters were used. - My attention was first drawn to it an intriguing and rapidly changing mackeral cloud formation. - With the aperture preview button depressed on the camera I could see these rich colors through the viewfinder except that they were typically more vibrant and shimmering than can be shown here. - Cloud iridescence occurs when sunlight is diffracted by uniformly sized water droplets or ice crystals most commonly in mid level Altocumulus or high level Cirrocumulus. - Also see this image - And this image - Nikon F3, 35mm lens, Fuji Velvia film. 2000 sec at ~f16. No filters used. © Ern Mainka
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I’m the one on the right with (with a halo? hehe..) while a friend walks by … (waldo? wally?)...... This the next cropped but otherwise unchanged picture after ‘where’s dinghy?’ below: / / I think it might be an something called a ‘brocken spectre’ (I’ve just heard about this tonight at my photography class – thanks mark!) . One tentative explanation is that ‘a brocken spectre appears when a low sun is behind a climber who is looking downwards into mist….from a ridge or peak. Both (unaltered) images were taken 1015am Jan 08 as we climbed out of town above the mist hanging over Peebles in scottish borders. The atmospheric optics group have accepted the image which the wonderful photographer Ern Mainka confirms is a faint version of a brocken spectre glory … now look at his tremendous example of the real thing in full colour below (which makes me feel very humble indeed) entilted:- Brocken Spectre and Glory by Ern Mainka (press image for link to his page with fascinating details) / / / / (PS It looks like this is my second ‘optical phenomenon’ already his year…. See ‘look up quick!’ how cool is that!) / / / / / :))
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Rainbow and anticrepuscular rays. / March 2008. Yarra Valley, Victoria, Australia. / FZ50 / © Ern Mainka
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Brocken Spectre and Glory 1/6/2007 near Yarra Glen, Melbourne, Victoria, Australia. © Copyright Ern Mainka Brocken Spectre and Glory ....The Brocken Spectre is the three dimensional shadow at the centre. It is dark air extending from the person/photographer all the way into the distance. Brocken shadows look triangular and large because of this. ....Glories (similar looking to a rainbow) form by diffraction, reflection and refraction of sunlight through water/mist droplets. Their formation involves surface waves as well as internal reflections. The number of rings and their angular extent is a function of the size distribution of the water droplets that compose clouds. With larger droplets the rings are more tightly packed. The clearer the colors appear in the fringes, the tighter the size distribution of the droplets (closer to one single size). Glories are polarized radially in the outer color fringes but tangentially in the center. / - / Brocken Spectre / A Brocken spectre (German Brockengespenst), also called Brocken bow or mountain spectre is the apparently enormously magnified shadow of an observer, when the Sun is low, cast upon the upper surfaces of clouds. If the observer is in an aeroplane, the shadow of the aeroplane is cast. The phenomenon can appear on any misty mountainside or cloud bank, but the frequent fogs and low-altitude accessibility of the Brocken, a peak in the Harz Mountains in Germany, have created a local legend. The spectre was observed and described by Johann Silberschlag in 1780, and has since been recorded often in literature about the region. The ‘Spectre’ appears when the sun shines from behind a climber who is looking down from a ridge or peak into mist. The light projects the climber’s shadow forward through the mist, often in an odd triangular shape due to perspective. The apparent magnification of size of the shadow is an optical illusion that occurs when the observer judges his shadow on relatively nearby clouds to be at the same distance as faraway land objects seen through gaps in the clouds. The shadow also falls on water droplets of varying distances from the eye, confusing depth perception. The ghost can appear to move (sometimes quite suddenly) because of the movement of the cloud layer. The head of the figure is often surrounded by the glowing halo-like rings of a glory (Heiligenschein), rings of coloured light that appear directly opposite the sun when sunlight is reflected by a cloud of uniformly-sized water droplets. ....More here .
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This faery size rainbow (or mistbow) and faint secondary bow were captured at Waterfall Valley in wilderness near Cradle Mountain, Tasmania. / Leica M3, Kodachrome 25. / © Ern Mainka
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Supernumeraries are created by small, almost same sized raindrops. “Supernumerary bows are an intimation of the limitations of geometric optics for it is totally unable to explain them. To do so we must take account of the ‘wave’ nature of light.” – Les Cowley Supernumerary Simulator / www.atoptics.co.uk/rainbows/supdrsz Nikon F3, 300mm lens, Fuji Velvia. © Ern Mainka
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An image I created with software. It buzzes.
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Iridescent Cloud (or irisation, fragmented Solar Corona). Nikon F3, 300mm lens. ~2000sec/f22 in auto exp. mode, Fuji Velvia film. No filters. Scanned with Imacon Flextight, processed in Adobe PS. These colors are very close to what was seen visually with sunglasses and on the cameras ground glass with the prism removed for viewing safety, Waves of rippling color could be seen as the cloud moved in relation to the sun. Colors were much more ‘electric’ in intensity than can be replicated here or in print. / © Copyright Ern Mainka
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Someone is always watching you these days. Do you feel safer for it? I must say that i dont actually have a problem with surveillance cameras … especially not in this day and age. Although those stupid spots on the ground that say security cameras work in this area are pretty dumb. Anyway, This image was just in a dream the other day.
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Doesn’t the flash on my camera make it look like a fiber-optic light display? No modifications.
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Circumzenithal Arc in Altocumulus cloud. CZA’s usually occurr directly overhead like this one and often go unnoticed because of this. / Nikon F3, 35mm wide angle lens, Fuji Velvia film. / © Ern Mainka
optical – information provided by wikipedia:
Op art, also known as optical art, is a genre of visual art, especially painting, that makes use of optical illusions. Op art is also known as geometric abstraction and hard-edge abstraction, although the preferred term for it is perceptual abstraction. "Optical Art is a method of painting concerning the interaction between illusion and picture plane, between understanding and seeing." Op art works are abstract, with many of the better known pieces made in only black and white. When the viewer looks at them, the impression is given of movement, hidden images, flashing and vibration, patterns, or alternatively, of swelling or warping.RedBubble is a great place to find art, design, photos and writing from over 50,000 talented people.
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