About Me

That's me...

And how frustration turned into an app.


The Origin

How did the development come about?

Fabian
This is me: Fabian :)

Just like many of you, I love photography as a hobby. And you know the feeling: you have an exact idea of the perfect shot, press the shutter, and when you check it on a large monitor, disappointment sets in. For me, it was street and portrait photography that set things in motion.

The Problem: During an important portrait shoot, the sharpness just didn't hold up. The subject was captured perfectly, the lighting was right, but at a wide open aperture, not only was the edge sharpness too soft—even the center was simply unusable, and the bokeh seemed distracting. I lacked a deep understanding of the "Sweet Spot" of my own lens in that specific setup.
The Test Run: I'm sure you know this: to truly get to know my gear, I shot an extensive test series. I set up a subject, mounted the camera on a tripod, and systematically photographed the exact same scene through all aperture stops — from completely open to completely closed.
Then I sat down in Lightroom. I examined every single image in detail at 100% zoom and started assigning ratings for my lens's performance at that exact aperture and distance.
And then? A few months passed before I had the chance to shoot again. Naturally, I had completely forgotten my test series by then. All I remembered was that shooting wide open was a no-go. But where exactly was the sweet spot again? At which focal length do I get the widest aperture with acceptable sharpness? I had simply forgotten.

So the actual shoot turned into yet another test shoot. The frustration grew and was confirmed later at the computer: I missed great shots because the settings were still not right. In that moment, I had an idea to take my forgetfulness out of the equation forever.
The System

From test shots to a matrix

Test series in Lightroom
My original test series in Lightroom: Every single shot was manually rated. If you will, this was the original matrix.

To make the results permanently usable for myself, I needed to visualize them. I rated the entire test series image by image back then – as an example, I'm showing the different sharpness levels here reduced to just three images:

Sample Image f/3.2
300% Zoom
Very Poor (70mm f/3.2)
Too soft, lack of contrast and obvious weaknesses across the entire image. Unusable.
Poor (Red)
Sample Image f/5
300% Zoom
Mediocre (70mm f/5.0)
Sharpness is improving somewhat, but still not enough for demanding results.
Fair (Yellow)
Sample Image f/8
300% Zoom
Good, but not outstanding (70mm f/8.0)
Satisfying sharpness reached. Good, but not truly excellent.
Good (Green)

The Proof

The official Test Charts

To verify my impressions, I consulted official test charts (MTF charts) for the lens (a Sigma from 2008). The surprising part: my own ratings differed significantly from the lab measurements! That’s the point—everyone has their own perception, and what the lab considered "very good" back in 2008 often looked mediocre to poor on today's high-res monitors. In fact, based on my own tests, I only found satisfying sharpness at apertures where the lens became useless for portraits because the bokeh almost completely disappeared. This is exactly what sparked the idea for the matrix—a system designed for your individual, visual needs rather than outdated lab standards. And ultimately, the decision to invest in a different lens that would be better suited for portraits.

MTF Test Chart 24mm MTF Test Chart 40mm MTF Test Chart 70mm MTF Rating Scale
Source: https://www.photozone.de/canon-eos/318-sigma-af-24-70mm-f28-ex-dg-macro-canon-lab-test-report--review?start=1
Test Lab (Lab Data)
24mm
40mm
70mm
f/2.8
f/4.0
f/5.6
f/8.0
My Perception (Practice)
24mm
40mm
70mm
f/2.8
f/4.0
f/5.6
f/8.0
That's how the idea was born: an app that brings this exact system to your smartphone, so you can pick the perfect lens for any moment with a single glance at the matrix.

The Beginning

An Interface was born

Early App Prototype

The image above comes from my very first conceptual phase on Jan 08, 2023 (3 years ago). During this time, my family grew, and whenever it was possible, I tried to develop the idea into a solid app. And now it's here!

What started with 4 colored dots, was once called LensPal, or was almost renamed to "Lericho" or "Lentrix", is now LensApp. I developed the app for myself, but I hope you can have just as much fun with it and confidently make the right decision at the right moment.

Please let me know what you like and what bothers you. You can reach me at support@lensapp-pro.com or on Instagram (@LensApp.pro) (maybe we'll publish LensCodes there soon? Let's see...).

The app is constantly being developed, and who knows what else is coming.

Best regards and happy shooting!

Coming soon to the App Store
Coming soon to Google Play