LensApp Pro is the systematic rating tool for photographers. Document the image quality of your lenses across focal length, aperture, and scene type — and find your personal sweet spot.
New: With Nerd Mode (Pro), you can rate 6 optical properties separately. The Analysis Tab shows sweet spots, aperture curves, scene comparisons, and more.
Basics
The Rating System
5 quality levels — visualized as colored circles of different sizes in the matrix.
Not rated – small gray placeholders
Poor (1) – significant weaknesses visible
Average (2) – acceptable, noticeable limits
Good (3) – solid everyday quality
Excellent (4) – the lens's sweet spot
Tap once to set the next level. Another tap cycles further — back to "empty."
Let's Go
Quickstart in 4 Steps
1
Create Camera
Tap + at the top right → "Add Camera." Enter manufacturer and model.
2
Create Lens
+ → "Add Lens." Enter the focal length range — the app automatically suggests sensible test points.
3
Choose Scene & Granularity
In the toolbar at the bottom, select a scene (Portrait / Street / Landscape / Macro) and aperture steps (Full / Half / Third).
4
Fill & Analyze Matrix
Tap cells and rate. In the Analysis Tab, you'll immediately see sweet spots, curves, and weak points.
Core Feature
The Rating Matrix
Each cell = a combination of focal length (column) × aperture (row). The matrix shows at a glance where your lens is strong and where it is weak.
Scene Types
Scene
Icon
Focus
Macro
Close-range sharpness, subject separation, color rendering at minimum distance
Portrait
Central subject sharpness, bokeh quality
Street
Micro-contrast, flare, rendering in backlit situations
Prevents accidental changes – cells glow yellow when a tap effort is detected
½/⅓ Steps
Full, half, or third aperture steps as matrix rows
Placeholders
Toggle small gray dots for unrated cells on/off
Lines
Horizontal and vertical grid lines can be toggled separately
Delete
Deletes all ratings for the current scene + category after confirmation
Sidebar & Navigation
A swipe gesture from the left edge of the screen opens the sidebar. All created cameras and lenses appear there. Tapping one immediately switches to the respective matrix.
Tip: The chevron arrow in the Camera/Lens bar is also tappable — it opens the selection dialog.
New
All Lenses at a Glance
The Master Lens Collection Matrix aggregates all rated lenses into a single, non-editable overview — ideal for seeing at a glance which lens is the best choice for a specific focal length + aperture combination.
Activation
In the Lens Selection area, a stack icon appears to the right of the lens name (⊡). Tapping it activates the "All Lenses" mode — the icon glows yellow, and the label changes to All Lenses.
Note: In "All Lenses" mode, Nerd Mode, Delete, and Lock are disabled. The matrix is read-only.
How to Read the Matrix
Each cell shows the best rating achieved by any lens in your collection for that focal length × aperture combination. Circle sizes and colors follow the same logic as the normal matrix:
● Small Circle
Poor – low potential at this combination
● Medium Circle
Average – usable but not ideal
● Large Circle
Good – recommended focal length/aperture range
● Very Large Circle
Excellent – optimal range for this lens
Tie Indicator
If multiple lenses share the best value for a cell, a yellow ring appears around the dot. Tapping the cell opens a popup with all relevant lenses and the exact rating level.
Popup Details
Tap a rated cell to open the Lens Info Popup. It shows:
Rating level (color + label)
Exact aperture and focal length
All lenses that reach this best value (labeled with a badge in case of a tie)
Maximum aperture of each lens
Pro Feature
Nerd Mode
For photographers who want to document every optical property separately. The overall matrix is automatically calculated from these values.
A scrollable bar appears at the bottom of the matrix area with one icon per property. Tapping switches the active category — the matrix then shows only ratings for that specific property.
Automatic Aggregation
As soon as sub-property ratings exist for a cell, LensApp automatically calculates the average value and rounds to the nearest level. The overall matrix in the Overall view then shows this aggregated value.
Property Profile · f/4 · 50mm
⊙ Sharpness
3.6
◌ Vignett.
2.4
🌈 CA
3.0
〰 Distort.
3.4
◎ Bokeh
3.8
◑ Contrast
2.8
→ Ø = 3.2 → Overall Cell =
Good
Computed Indicator
Aggregated cells in the overall view are marked with a colored ring (red for most, yellow on the red dot). Tapping such a cell only provides visual feedback — the value is read-only as long as sub-ratings exist.
Evaluation
Analysis Tab: Statistics
The Analysis tab automatically evaluates your ratings. Select a lens and a scene at the top — all cards update instantly.
Progress Ring
Shows how many cells of the matrix are already filled. The color changes from red (low) through yellow and green to blue (nearly complete).
Progress · Portrait Scene
70%full
14 / 20 cells rated
6 cells still pending
Scene Comparison
Shows the average rating for all 4 scenes side-by-side — ideal for seeing which use case the lens is best suited for.
Scene Comparison · Sigma 24-70mm
3.1
Portrait
3.6
Street
2.4
Landscape
3.3
Macro
Strengths & Weaknesses
On the left, the best aperture and focal length (sweet spot); on the right, the weakest. This allows you to immediately recognize where the lens shines and where it is limited.
Strengths & Weaknesses · Portrait
↑
STRENGTHS
f/5.6
Best Aperture
50 mm
Best Focal Length
↓
WEAKNESSES
f/2.8
Weakest Aperture
24 mm
Weakest Focal Length
Aperture Quality Curve
A line + area chart shows how the rating changes across all aperture levels. Typical for lenses: weaker at wide open apertures, sweet spot at f/5.6–f/8, slight decrease due to diffraction at f/16+.
Aperture Quality Curve · Sigma 24-70mm · Portrait
Property Profile (Nerd Mode)
Only visible when sub-property ratings are present. Shows the average value for each optical property as a bar — with a yellow frame as a Pro indicator.
🔬 Property Profile · Portrait · Sigma 24-70mm
⊙ Sharpness
3.5
◎ Bokeh
3.8
◑ Contrast
2.8
◌ Vignett.
2.2
Sharing
Community
Share your experience with other photographers or import external matrices as a reference.
Create LensCode
A unique QR code with an app icon – directly suitable for social media sharing.
Import LensCode
Scan another user's code and implement their experiences as a comparison.
LensCode Library
Use the integrated library as a starting point. Then, the best way to interact is directly through LensCodes within the community!
Cloud Backup
All data is automatically secured – restore with one tap on a new device.
Upgrade
Free vs. Pro
LensApp is free to use. Pro unlocks all power user features.
