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#fisheye

1 post1 participant0 posts today
Public
TJ
Shy Green

Another long exposure and also using the solar filter (the filter used usually to observe solar eclipses), but this time, coupled with my modified camera; a camera that is tinkered with to be able to take a full-spectrum images (with the help of other filters). Again, I'm using here the Rokinon 8mm fisheye lens, which is completely manual, and the solar filter was taped to the back of the lens.
I was quite surprised for the exposure here. I was expecting something in the range of 3-5 hours because I did so with a regular camera few days prior to this, but unexpectedly, the calculated exposure time here was about 42 minutes and 50 seconds, so approximately 43 minutes. The general look here looks like a scene that I'd get from using an infrared filter on the lens with a low threshold (650~700nm). It seems that the solar filter might block most of the visible (and maybe the ultraviolet) range of light, but when it comes to infrared, it is quite permissible!

#LE #long-exposure #longexposure #infrared #green #turquoise #yard #fisheye #rokinon #8mm #surreal #surrealism #goodmorning
#goodmorning
Public
TJ
隱

Another long exposure, and this one was like an adventure for me, for various reasons:
- One: It was taken with my favorite fisheye lens (Rokinon 8mm) which is completely manual; so all calculations and control must be done manually here (plus a lot of test shots).
- Two: The fact that it is a fisheye lens, I had to improvise a way to fit any filter "in" it. No way to put any filter on the front; so, the filters would be applied to the back (by insertion into some grooves or using tiny pieces of duct tape).
- Three: I've used a solar filter here, which is typically used to observe the sun and solar eclipses, and typically it has high opacity.
- Four: Because of the filter, the exposure at basic ISO level would naturally be "long". Literally... "long". The exposure for this shot here was 5 hours and 20 minutes approximately.

So, the scene here appears empty, but in reality there were people going in and out and there was pretty much movement around the place, but nothing was recorded (of course). The colors also had to be fixed as the filter shifted the colors considerably. The noise level is HORRENDOUS to say the least! I really didn't even bother cleaning much of the noise here; cleaning it would leave me with a smudged image. Despite all of that, though, it is weird that back then, there was not much breeze or wind to shake the branches (something I was hoping for actually to add action to the scene). I've noticed that every time I try to do a long exposure, not much breeze or wind play out - bad luck? Maybe. Or maybe this is what they call "karma"?

#LE #longexposure #long_exposure #yard #green #solar #fisheye #rokinon #8mm #hidden #unseen #goodmorning
#goodmorning
Public
TomKrajci 🇺🇦 🏳️‍🌈 🏳️‍⚧️

Fisheye lens views of a large portion of the midnight sky, as seen from the Sacramento mountains of southern New Mexico.

First image is a stack of 100 30-second exposures. The winter Milky Way runs left to right a bit above the middle of the image. Dark dust clouds add texture to the bright star clouds.

Second image is annotated to show the gegenschein/counterglow...which is 180 degrees opposite the sun's position in the sky.

en.wikipedia.org/wiki/Gegensch

Third image is a single exposure, straight off the camera with lots of contrast boost. Red airglow is like a layer of cirrus clouds over the entire sky. (Fortunately, a stack of 100 images tends to smooth over the textured airglow. This is a common challenge during solar maximum.)

en.wikipedia.org/wiki/Airglow

Compare to my recent images using an all-sky 'circular fisheye':
universeodon.com/@KrajciTom/11

First image is a stack of 100 30-second exposures. The winter Milky Way runs left to right a bit above the middle of the image. Dark dust clouds add texture to the bright star clouds.
Second image is annotated to show the gegenschein/counterglow...which is 180 degrees opposite the sun's position in the sky. (Red circle) https://en.wikipedia.org/wiki/Gegenschein The band of zodiacal light is shown by a green line that intersects the Milky Way.
Third image is a single exposure, straight off the camera with lots of contrast boost. Red airglow is like a layer of cirrus clouds over the entire sky. (Fortunately a stack of 100 images tends to smooth over the textured airglow. This is a common challenge during solar maximum.) https://en.wikipedia.org/wiki/Airglow
#NewMexico#Astronomy#Astrophotography
Public
TomKrajci 🇺🇦 🏳️‍🌈 🏳️‍⚧️

Two fisheye lens views of the entire sky, as seen from the Sacramento mountains of southern New Mexico. (Elevation 9,440 feet)

First image is a stack of 77 30-second exposures. The winter Milky Way runs diagonally across the sky in the lower right portion of the frame. It is rich with texture from dark dust clouds. The zodiacal light stands tall, starting at the horizon at the upper left, and stretches faintly across the sky. It is featureless.

Note the light pollution at the horizon at all azimuths. It has different colors in different azimuths.

Second image (stack of 19 30 second exposures) is taken a few minutes later as the first light of dawn brightens the sky in the east (left). The brightest part of the zodiacal light stands out a little more strongly than in the first image. If you are in a dark sky this 'false dawn' can fool you into thinking that sunrise is coming soon.

First image is a stack of 77 30-second exposures. The winter Milky Way runs diagonally across the sky in the lower right portion of the frame. It is rich with texture from dark dust clouds. The zodiacal light stands tall, starting at the horizon at the upper left, and stretches faintly across the sky. It is featureless.
Second image (stack of 19 30 second exposures) is taken a few minutes later as the first light of dawn brightens the sky in the east (left). The brightest part of the zodiacal light stands out a little more strongly than in the first image. If you are in a dark sky this 'false dawn' can fool you into thinking that sunrise is coming soon.
#NewMexico#Astronomy#Astrophotography
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