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.

Geotag Icon Show on map 

Related Posts
This year we started with a photographic experiment. We recruited three assistants and used some sparklers to write 2014 in the air.

In this image we used sparklers to write 2014 in the air.
READ MORE
This spherical panorama shows the interior of the Westend Synagogue in Frankfurt am Main
READ MORE
This image shows a reprojected version of this panorama.




READ MORE
The Ludwigs Maximilians University has been founded in 1472 in Ingolstadt and moved to Munich in 1826. This panorama shows the areaway between the main entrance and the lecture hall.


READ MORE
Seljalandsfoss is a waterfall in the south of Iceland. It drops 60 meters (approx. 200 feet) over the former coastline. Following a footpath you can get behind the waterfall.


READ MORE
This turf church is one of only six icelandic turf churches still standing. They are preserved as historical monuments. This church was built 1834 and has turf walls, but timber gables both back and front.



READ MORE
Experiments with creating a cinemagraph.

Experimenting With a Cinemagraph
READ MORE
This panorama is the result of 26 stitched images made with the Sony NEX-5 and the 16mm pancake lens. It is a test to be compared with the experiment I described in my last two posts.
READ MORE
Happy new year 2014
Westend Synagogue
Skyline of Frankfurt am Main on a sunny
Reprojected Ludwig-Maximilians-University Areaway
Ludwig-Maximilians-University Areaway
Standing at Seljalandsfoss in Iceland
Turf church Víðimýrarkirkja (Iceland)
Experimenting With a Cinemagraph
Multirow Spherical Panorama made with the Sony NEX-5
Cornerfix profiles for ultra wide Voigtlaender lenses on

Author: PanoTwin Jürgen

PanoTwin Jürgen → My images on Google Maps

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

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.