What this tool is for
Use a phone photo as a framing reference before choosing a lens for another camera. The tool translates the phone’s displayed zoom into a universal 35mm-equivalent view, then estimates the physical lens that gives similar framing on the selected camera sensor. It also works in reverse: enter a physical lens to find the corresponding phone zoom.
Step 1
Set the phone view
Select your phone and reproduce the zoom used for the reference photo. Plan to mount the other camera at approximately the same optical position and aim.
Step 2
Select the active sensor
Choose the sensor dimensions and aspect ratio actually used by the camera. The inch-style name alone is not enough when the active ROI differs.
Step 3
Choose and verify the lens
Use Lens to use as the starting focal length, select the closest lens you can obtain, and confirm the final framing on the real installation.
What it matches: approximate subject size and horizontal coverage from the same position. It does not predict sharpness, distortion, depth of field, focus breathing, exposure, or image quality. Changing the camera position also changes the view. For exact distance-based FOV, depth-of-field, and exposure planning, use the Object-size lens & exposure calculator .
One reference for the same view
35mm equivalent and full-frame equivalent describe the same framing reference: the view a lens would produce on a roughly 36 × 24 mm camera sensor.
The answer is not always 35 mm. A result of 92 mm means your phone is showing approximately the same framing as a 92 mm lens on that reference camera.
What 35mm equivalent means. Two different camera systems can describe the same framing with one universal full-frame reference.
Phone framing compared with its 35mm-equivalent full-frame view
Two equal scene frames show the same tower and horizontal coverage. The left represents the selected phone view and the right represents the full-frame camera and equivalent focal length. Equivalent focal length describes framing, not the phone lens's physical focal length.
PHONE VIEW
FULL-FRAME REFERENCE
=
SAME SUBJECT SIZE · SAME HORIZONTAL FRAMING
Phone now Galaxy S26 Ultra · 1.0×
35mm equivalent 23 mm on the full-frame reference
Camera sensor size comparison
The rectangles are proportional. The tool uses conventional crop factors for photographic formats and active width for industrial 16:9 or 4:3 matching.
Matching an industrial camera. Keep approximately the same optical position and aim. Matching active width preserves the left and right limits; a full 4:3 sensor records more above and below than the phone’s 16:9 frame.
Horizontal framing match between a 16 by 9 phone image and a 4 by 3 industrial camera
A phone and industrial camera share one optical position and point toward overlapping frames. Both frames have identical left and right edges. The 4 by 3 frame extends above and below the 16 by 9 frame.
SAME POSITION + AIM
PHONE 16:9
4:3 EXTRA VERTICAL AREA
4:3 EXTRA VERTICAL AREA
IDENTICAL LEFT + RIGHT LIMITS
Selected camera Full frame · crop-factor match
Lens for this view 23 mm · photographic framing match
Photography and compact
These formats use conventional diagonal crop-factor equivalence.
Full frame Sony α7 IV
Sensor 35.9 × 23.9 mm
Crop 1.0×
Lens now 23 mm
APS-C Fujifilm X-T5
Sensor 23.5 × 15.7 mm
Crop ≈1.5×
Lens now 15.3 mm
Canon APS-C Canon EOS R7
Sensor 22.3 × 14.8 mm
Crop 1.6×
Lens now 14.4 mm
Micro Four Thirds OM System OM-1 Mark II
Sensor 17.3 × 13.0 mm
Crop 2.0×
Lens now 11.5 mm
1-inch Sony RX100 VII
Sensor 13.2 × 8.8 mm
Crop 2.7×
Lens now 8.5 mm
Flagship phone main Galaxy S26 Ultra context
Sensor ≈9.6 × 7.2 mm
Crop ≈3.6×
Lens now Varies
Industrial — 16:9 active area
For a camera placed at approximately the same optical position and aim as the phone, these formats use active width to match horizontal object size and view. Physical lens = 35mm equivalent × active width ÷ 36; reverse conversion uses physical lens × 36 ÷ active width. Inch-style names are approximate optical-format classes; the listed 16:9 millimetres are what the calculation uses.
1/1.2″ Basler ace / Sony IMX174 class
Active area 11.20 × 6.30 mm
Horizontal 3.21×
Lens now 7.2 mm
2/3″ Industrial 16:9
Active area 9.60 × 5.40 mm
Horizontal 3.75×
Lens now 6.1 mm
1/1.8″ Industrial 16:9
Active area 7.68 × 4.32 mm
Horizontal 4.69×
Lens now 4.9 mm
1/2.3″ Industrial 16:9
Active area 6.40 × 3.60 mm
Horizontal 5.63×
Lens now 4.1 mm
1/2.8″ Industrial 16:9
Active area 5.57 × 3.13 mm
Horizontal 6.46×
Lens now 3.6 mm
1/3″ Industrial 16:9
Active area 4.80 × 2.70 mm
Horizontal 7.50×
Lens now 3.1 mm
Treat the result as a starting point. Active ROI, lens distortion, focus distance and breathing, focal-length tolerances, and a different optical-centre position can all change the real view. Choose the closest available industrial lens and verify the framing on site.
Industrial — 4:3 active area
These presets use the same active-width calculation to preserve horizontal coverage. Compared with the phone’s 16:9 image, the full 4:3 active area records more above and below.
1/3″ Industrial 4:3
Active area 4.80 × 3.60 mm
Horizontal 7.50×
Lens now 3.1 mm
1/2.8″ Industrial 4:3
Active area 5.18 × 3.89 mm
Horizontal 6.95×
Lens now 3.3 mm
1/2.3″ Industrial 4:3
Active area 6.17 × 4.55 mm
Horizontal 5.83×
Lens now 3.9 mm
1/2″ Industrial 4:3
Active area 6.40 × 4.80 mm
Horizontal 5.63×
Lens now 4.1 mm
1/1.8″ Industrial 4:3
Active area 7.18 × 5.32 mm
Horizontal 5.01×
Lens now 4.6 mm
2/3″ Industrial 4:3
Active area 8.80 × 6.60 mm
Horizontal 4.09×
Lens now 5.6 mm
1″ Industrial 4:3
Active area 12.80 × 9.60 mm
Horizontal 2.81×
Lens now 8.2 mm
Phone dimensions are an approximate size reference only. A phone can use a different sensor behind each camera, and manufacturers do not always publish the active dimensions.
Representative specifications: Sony α7 IV , Fujifilm X-T5 , Canon EOS R7 , OM-1 Mark II , Sony RX100 VII , and Basler ace / Sony IMX174 . Industrial active-area dimensions match this site's `/lens/` 16:9 and 4:3 presets. Verified July 2026.