Uploaded 25-Aug-17
Taken 21-Aug-17
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Photo Info

Dimensions1132 x 1097
Original file size1.8 MB
Image typeJPEG
Color spacesRGB
Date taken21-Aug-17 10:18
Date modified25-Aug-17 11:13
Shooting Conditions

Camera makeNIKON CORPORATION
Camera modelNIKON D7200
Focal length420 mm
Focal length (35mm)630 mm
Max lens aperturef/5.7
Exposure1/80 at f/11
FlashNot fired, compulsory mode
Exposure bias0 EV
Exposure modeManual
Exposure prog.Manual
ISO speedISO 200
Metering modePattern
Digital zoom1x
The Corona in Corvallis Oregon

The Corona in Corvallis Oregon

I was a little disappointed that I was not able to take more images of the corona so I decided to work on what I had. I have a total of three images of totality and the extremes of the dynamic range is challenging which is why photographers try to capture as many frames as they can. This is an experiment with just one RAW image, but I expect I would eventually incorporate all three if I can.

The vibrations in my small tracking mount and the weight of my camera rig took its toll. The capacity of the mount was designed for smaller lenses so I was definitely pushing the boundaries. As a consequence there is some distracting afterimages in the edges of the Moon. I decided to artificially occult the Moon and Sun by creating a circular selection and filling it with black. This also allowed me more freedom in stretching the remainder of the image to better see the streamers. This was greatly aided by the use of HDR toning and the RAW image that I had captured.

I was also after an image that would closely match what we saw with our naked eyes during totality. I shifted the background tone to a blue to approximate the darkened sky during totality. For me this closely matches what I saw.

Camera: Nikon 7200
Lens: Nikkor 300/4 AFS with TC-1.4x for an effective focal length of 630mm
Sensor ISO: 200
Exposure: 1/80 second at f/11
Processing: Adobe Photoshop CC 2017 (HDR Toning)