Another Experiment With a Cinemagraph

The original footage has been taken from a Full- HD movie. I exported some frames of the film to individual images and used Photoshop CS6 to create this cinemagraph (in fact it’s an animated GIF image).

View over Husavik harbour
View over Husavik harbour

Lessons learned: Use a tripod!

As I didn’t use a tripod in the shoot, I had to align each of the images to minimize the movement between frames.

Comparing corrected and uncorrected images of CV12mm/5.6 on Sony NEX-7

In a post from yesterday I analyzed a series of images from the Voigtländer Ultra Wide Heliar 12mm/5.6 on my Sony NEX-7 in order to identify the best aperture for maximum resolution. I wondered about the impact of my corrections at the stage of post-processing the images. To answer this question I picked the image taken with an aperture of f=8 and compare a uncorrected and a corrected version of the image.

While post-processing the uncorrected image I did the following:

  • conversion from ARW- to DNG-format
    (Adobe DNG Converter 6.6.0.261)
  • input sharpening in Adobe Camera Raw
    (Sharpn. = 25, Shrp.Radius = +1.0, Shrp.Detail = 25, Shrp.EdgeMasking = 0)
  • noise reduction in Adobe Camera Raw
    (LuminanceSmoothing = 0, Col.NoiseReduction = 25, Col.NoiseRed.Detail = 50)
Magenta cast and vignetting in corners uncorrected, distortion and chromatic aberrations also uncorrected.
Full image (uncorrected) with marked crop locations

While post-processing the corrected image I did the following:

  • conversion from ARW- to DNG-format
    (Adobe DNG Converter 6.6.0.261)
  • correction of magenta cast in the corners and vignetting with cornerfix
    (cornerfix 1.4.2.0)
  • correction of chromatic aberration in Adobe Camera Raw
    (ChromaticAberrationR = -15, ChromaticAberrationB = +8)
  • correction of distortion in Adobe Camera Raw
    (LensManualDistortionAmount = +3, PerspectiveScale = 101)
  • input sharpening in Adobe Camera Raw
    (Sharpn. = 25, Shrp.Radius = +1.0, Shrp.Detail = 25, Shrp.EdgeMasking = 0)
  • noise reduction in Adobe Camera Raw
    (LuminanceSmoothing = 0, Col.NoiseReduction = 25, Col.NoiseRed.Detail = 50)
Corners corrected with cornerfix, distortion and chromatic aberrations corrected with Adobe Camera RAW
Full image (corrected) with marked crop locations

For each of the marked locations in the full image I extracted a square (250 pixel * 250 pixel) which I will present at it’s original resolution. These images are not sharpened except for the same input sharpening with the raw converter. They are saved for web with a quality-setting of 60%.

Voigtländer Ultra Heliar 12mm/5.6@8 (uncorrected)
Voigtländer Ultra Heliar 12mm/5.6@8 (uncorrected)

Voigtländer Ultra Heliar 12mm/5.6@8 (corrected)
Voigtländer Ultra Heliar 12mm/5.6@8 (corrected)

In my opinion it’s clearly visible that the applied correction didn’t reduce the resolution of the image and therefore the identification of the best aperture for maximum resolution is not affected by these corrections.

Voigtländer Ultra Wide Heliar 12mm/5.6 (on Sony NEX-7) at different apertures

Recently I started using a Voigtländer Ultra Wide Heliar 12mm/5.6 on my Sony NEX-7. In two other articles I already described how to configure your NEX-7 for maximum assistance with manual lenses, how to attach the lens to the camera and how to post-process the images to eliminate the magenta cast in the corners.

As I am aware of the fact, that any combination of lens and body has it’s maximum sharpness at a specific aperture I did a series of test images to find this maximum. My subject was the front of a building. It has a nearly flat surface and the clinker bricks contain a lot of fractal details. The camera was mounted on a tripod whose distance to the wall was approximately 15 meters (approximately 50 feet). Images were taken with self-timer to prevent any camera-shake. Focus was set at the first exposure which was taken at f=5.6. The image quality was set to RAW (6,000 pixel * 4,000 pixel).

While post-processing the images I did the following:

  • conversion from ARW- to DNG-format
    (Adobe DNG Converter 6.6.0.261)
  • correction of magenta cast in the corners and vignetting with cornerfix
    (cornerfix 1.4.2.0)
  • correction of chromatic aberration in Adobe Camera Raw
    (ChromaticAberrationR = -15, ChromaticAberrationB = +8)
  • correction of distortion in Adobe Camera Raw
    (LensManualDistortionAmount = +3, PerspectiveScale = 101)
  • input sharpening in Adobe Camera Raw
    (Sharpn. = 25, Shrp.Radius = +1.0, Shrp.Detail = 25, Shrp.EdgeMasking = 0)
  • noise reduction in Adobe Camera Raw
    (LuminanceSmoothing = 0, Col.NoiseReduction = 25, Col.NoiseRed.Detail = 50)

The following image (at f=8) was scaled to 1,500 pixel * 1,000 pixel, sharpened and saved for web with a quality-setting of 60%.

Corners corrected with cornerfix, distortion and chromatic aberrations corrected with Adobe Camera RAW
Full image with marked crop locations

For each of the marked locations in the full image I extracted a square (250 pixel * 250 pixel) which I will present at it’s original resolution. These images are not sharpened except for the same input sharpening with the raw converter. They are saved for web with a quality-setting of 60%.

Voigtländer Ultra Heliar 12mm/5.6@5.6
Voigtländer Ultra Heliar 12mm/5.6@5.6
Voigtländer Ultra Heliar 12mm/5.6@8
Voigtländer Ultra Heliar 12mm/5.6@8
Voigtländer Ultra Heliar 12mm/5.6@11
Voigtländer Ultra Heliar 12mm/5.6@11
Voigtländer Ultra Heliar 12mm/5.6@16
Voigtländer Ultra Heliar 12mm/5.6@16
Voigtländer Ultra Heliar 12mm/5.6@22
Voigtländer Ultra Heliar 12mm/5.6@22

In my opinion it’s easy to see that the Voigtländer Ultra Wide Heliar 12mm/5.6 reaches it’s maximum sharpness at an aperture around 8 on a Sony NEX-7. If you stop further down diffraction starts to limit the resolution. For further reading on this issue try to start at this page at diglloyd.com.

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Panotwin Markus shooting the subway station Westfriedhof for WWP ‘Color’

Today I was searching for an image of the subway station Westfriedhof in Munich. As I browsed my database I found the following image of Panotwin Markus shooting the Munich subway station Westfriedhof with a double monopod setup.

Panotwin Markus doing a poleshot.
Panotwin Markus doing a poleshot.

The final panorama is hosted at the WWP event ‘Color’.
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Happy new year 2012

This year we started with a photographic experiment. We recruited two assistants and used some sparklers to write 2012 in the air.

In this image we used sparklers to write 2012 in the air.
2012 written with sparklers

With this image we wish you happiness, luck and health for 2012. And of course a lot of new panoramic images 🙂

Exposure Time: 6 sec
F-Number: 11
Focal Length: 35 mm
ISO: 200