Category Archives: Photo Techniques

Ultrawide Rectilinear or Fisheye lenses: to defish or not to defish

An ultrawide lens (anything below 24 mm in 35 mm equivalent format) can provide a sweeping view of an open landscape, but I also find it important for crowded forest and tree covered environments.

The widest rectilinear lens I own is an 11 mm lens by Irix and it is an excellent lens, but these pictures are made with other lenses. They are landscapes I made while testing an ultra wide 11 mm lens by Venus Optics on my Z7 alongside a 12 mm Samyang fisheye lens. I no longer own either lens but the photos I made that afternoon are good representatives of what can be done with these optics.

Pastures photo taken with a fisheye lens. Photo by Eduardo Libby
A fisheye lens allowed me to frame the pastures with he branches literally above my head. By keeping the horizon near the center of the frame, it remains straight on a fisheye lens image.

One thing I sometimes dislike about ultra wide rectilinear lenses is that elements in the corners of the image can look too stretched, like sucked into the frame. Because of this, I sometimes actually prefer using a fisheye lens: when used carefully, one can can hide the strong deformation we associate with their extreme projection. By keeping the horizon near the center of the frame, it remains straight on a fisheye lens image. In other cases, the image can be reprojected (defished as some people call it) to avoid the curved corners.

RReprojected fisheye photo of pastures. Photo by Eduardo Libby
Removing just enough of the fisheye distortion can provide a convincing ultra wide image without the light falloff that plagues rectilinear ultra wide angle lenses in the corners.
Pastures photo with an ultrawide angle lens. Photo by Eduardo Libby
A photo using the rectilinear Laowa 11 mm lens works fine and takes advantage of the stretching of the lower tree branch to give depth to the composition.

You can be the judge now and decide if this approach works as I really wanted to include nearby elements from a restricted point of view: I was literally shooting from a barbed-wire fence in all the photos I show here.

Have you tried using fisheye lenses for landscape photos?

Comparison of images made using the 11 mm rectilinear lens and a 12 mm fisheye. Photos by Eduardo Libby
Here are two images made from about the same viewpoint using the 11 mm rectilinear lens and the 12 mm fisheye. They are clearly not identical but both are very usable.
Do you like one better than the other?

How good is in-camera focus stacking?

Even though not all digital cameras offer automated focus-stacking of focus-bracketed exposures, the Panasonic and Olympus micro four thirds cameras have been doing it for several years so far. I wanted to compare it with computer focus stacking and, with my garden orchids blooming, I finally did the test.

Continue reading How good is in-camera focus stacking?

Macro and Close Up? Give me my micro four thirds camera please!

When doing macro and close-up photography convenience is number one… well, a good subject is number one actually and quality is a given, but you get my drift…

Continue reading Macro and Close Up? Give me my micro four thirds camera please!

Nikon’s Z7 requires AF-Fine Tuning

The claims that on-sensor phase-detection autofocus sensors in Nikon’s Z7 does away with autofocus fine-tuning are wrong. I had to use AF Fine Tuning to get my lenses to focus properly. Continue reading Nikon’s Z7 requires AF-Fine Tuning

Is it better to mount Canon’s 500D Close-up filter in reverse?

Here and there I’ve read in the internet that mounting Canon’s 500D close-up filter in reverse gives you better image quality.  So, I tried it… Continue reading Is it better to mount Canon’s 500D Close-up filter in reverse?

Real world, false colors

We’ve all seen those fantastic satellite images that show details of vegetation cover, water and other features in what scientists call false-color. Have you ever thought what they would look like if taken from the ground, just as a regular photo? Continue reading Real world, false colors

Photographer, know thy camera!

Photographer, know thy camera!

We  know we should not take pictures with important highlights clipped from our precious photos. This is why our cameras show histograms and flashing pixels in the LCD, but… are they always right? Continue reading Photographer, know thy camera!