Sony Projector Lens Calculator

Advanced Lens Calculator

Preset values are starter planning estimates. Replace them with values from your exact Sony projector manual before installation.

Lens preset

Model or lens name

Result display unit

Screen Geometry

Screen diagonal

Diagonal unit

Aspect ratio

Custom aspect width

Custom aspect height

Overscan or masking allowance (%)

Throw Distance and Zoom

Minimum throw ratio

Maximum throw ratio

Zoom position (%)

Selected: 50%

Actual install distance

Actual distance unit

Mount safety margin (%)

Lens Shift and Alignment

Max vertical lens shift (%)

Max horizontal lens shift (%)

Offset unit

Desired vertical offset from screen center

Desired horizontal offset from screen center

Brightness, Seating, and Resolution

Rated projector lumens

Screen gain

Picture mode output (%)

Lamp or laser health (%)

Room light loss (%)

Seating distance

Seating unit

Resolution width pixels

Resolution height pixels

Example Data Table

These sample rows show how screen size changes throw range and brightness.

Screen Diagonal	Aspect	Throw Ratio	Approx Throw Range	Example Use
100 in	16:9	1.35 - 2.84	9.8 ft - 20.6 ft	Small theater room
120 in	16:9	1.35 - 2.84	11.8 ft - 24.8 ft	Common home cinema
150 in	16:9	1.35 - 2.84	14.7 ft - 31.0 ft	Large media room

Formula Used

Screen and Throw

screen width = diagonal × aspect width / √(aspect width² + aspect height²)

throw distance = screen width × throw ratio

required throw ratio = actual distance / screen width

Shift and Brightness

vertical shift allowance = screen height × vertical shift %

horizontal shift allowance = screen width × horizontal shift %

foot lamberts = usable lumens × screen gain / screen area in ft²

nits = foot lamberts × 3.426

How to Use This Calculator

Enter the Sony projector model name or choose an editable preset.
Add screen diagonal, unit, and aspect ratio.
Enter the throw ratio range from your projector manual.
Enter your real mounting distance to check lens compatibility.
Add lens shift limits and planned offsets from screen center.
Enter brightness, screen gain, room loss, and seating distance.
Press calculate. Results appear above the form.
Download CSV or PDF for records, installers, or planning notes.

Sony Projector Lens Planning Guide

Start With the Screen

A projector lens plan starts with the screen. The screen width controls throw distance. Diagonal size alone is not enough. Aspect ratio changes width and height. This calculator converts diagonal size into real image dimensions first.

Understand Throw Ratio

Throw ratio is the main lens rule. It equals distance divided by image width. A low ratio places the projector closer. A high ratio places it farther away. Zoom lenses cover a range between the minimum and maximum ratios. The tool checks both ends and also tests your actual distance.

Use Lens Shift Carefully

Lens shift is different from keystone. Lens shift moves the image optically. It protects sharpness. Vertical shift uses image height. Horizontal shift uses image width. The calculator compares your desired offset with the safe shift limits you enter from your Sony manual.

Check Brightness and Comfort

Brightness matters after distance is solved. Large screens spread light over more area. Screen gain, picture mode, lamp age, and room loss affect the final result. Foot lamberts are useful for cinema rooms. Nits are useful for general display comparison.

Use the seating angle to judge comfort. A wider angle feels more cinematic. A smaller angle feels calmer for presentations. The tool estimates viewing angle from screen width and seating distance. It also estimates pixel density from the selected resolution.

Plan Before Mounting

This planner is best used before drilling mounts or ordering a screen. Enter the model values from your projector guide. Then test several screen sizes. Watch how distance, brightness, shift, and viewing angle change. A setup that fits one screen may fail on another.

Keep a small installation margin. Walls are not always straight. Mount arms have limited travel. Cable bends need space. Screens may have borders or masking panels. The calculator includes margin inputs so the final plan is more realistic.

For best results, avoid heavy keystone correction. Use lens shift and physical alignment first. Place the projector square to the screen. Confirm focus at the chosen throw distance. Then export the result as CSV or PDF for your installer. Save each result with notes. Compare quiet mode and bright mode separately. Recheck numbers after choosing the exact Sony lens, screen gain, mount height, room lighting, ceiling level, and cable path.

FAQs

1. What is throw ratio?

Throw ratio is projector distance divided by image width. It tells how far the lens must sit from the screen for a chosen image size.

2. Can I use this for any Sony projector?

Yes, if you enter the correct throw ratio, lens shift, and brightness values from the exact Sony model manual.

3. Is lens shift the same as keystone?

No. Lens shift moves the image optically. Keystone digitally reshapes the image and can reduce sharpness. Use lens shift first when possible.

4. Why does screen width matter more than diagonal?

Throw distance uses image width, not diagonal. The calculator converts diagonal and aspect ratio into width before solving distance.

5. What brightness range should I target?

Dark cinema rooms often look good around 12 to 22 foot lamberts. Brighter rooms usually need more output and better light control.

6. Why add a mount safety margin?

A margin helps cover wall variation, bracket limits, cable bends, and small measurement errors before the projector is permanently mounted.

7. Can the PDF replace an installer survey?

No. The PDF is a planning summary. Final mounting should confirm wall strength, ventilation, cable paths, power, focus, and real lens settings.

8. Why use screen gain in the calculator?

Screen gain affects reflected brightness. Higher gain can boost brightness, but it may narrow viewing angles or create hotspot effects.