Crop Factor Equivalent Focal Length

Convert lens focal length to 35mm equivalent using sensor crop factor.

Author

Dr. Sofia Mendoza Ruiz

Photography editorial contributor

Mexican marine biologist from UNAM, documenting coral reef degradation across the Caribbean

Reviewed by

Prof. Ingrid Johansson

Photography content reviewer

Norwegian political scientist at the University of Oslo, studying democratic resilience in Nordic welfare states

Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

Reference Values

Browse 56 reference values with individual detail pages for quick lookup.

Browse all reference values

Crop Factor Equivalent Focal Length Calculator

Estimate 35mm equivalent focal length (and optional equivalent aperture) from lens and crop factor.

Equivalent Focal Length

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Reference Table

Use this complete table for quick lookup and internal linking to specific value pages.

Crop Factor Equivalent Focal Length Reference
Lens Setup	Equivalent Focal Length	Crop Factor
10 mm lens on 1.3× crop	13 mm equivalent	1.3×
10 mm lens on 1.5× crop	15 mm equivalent	1.5×
10 mm lens on 1.6× crop	16 mm equivalent	1.6×
10 mm lens on 2× crop	20 mm equivalent	2×
12 mm lens on 1.3× crop	15.6 mm equivalent	1.3×
12 mm lens on 1.5× crop	18 mm equivalent	1.5×
12 mm lens on 1.6× crop	19.2 mm equivalent	1.6×
12 mm lens on 2× crop	24 mm equivalent	2×
14 mm lens on 1.3× crop	18.2 mm equivalent	1.3×
14 mm lens on 1.5× crop	21 mm equivalent	1.5×
14 mm lens on 1.6× crop	22.4 mm equivalent	1.6×
14 mm lens on 2× crop	28 mm equivalent	2×
16 mm lens on 1.3× crop	20.8 mm equivalent	1.3×
16 mm lens on 1.5× crop	24 mm equivalent	1.5×
16 mm lens on 1.6× crop	25.6 mm equivalent	1.6×
16 mm lens on 2× crop	32 mm equivalent	2×
18 mm lens on 1.3× crop	23.4 mm equivalent	1.3×
18 mm lens on 1.5× crop	27 mm equivalent	1.5×
18 mm lens on 1.6× crop	28.8 mm equivalent	1.6×
18 mm lens on 2× crop	36 mm equivalent	2×
20 mm lens on 1.3× crop	26 mm equivalent	1.3×
20 mm lens on 1.5× crop	30 mm equivalent	1.5×
20 mm lens on 1.6× crop	32 mm equivalent	1.6×
20 mm lens on 2× crop	40 mm equivalent	2×
24 mm lens on 1.3× crop	31.2 mm equivalent	1.3×
24 mm lens on 1.5× crop	36 mm equivalent	1.5×
24 mm lens on 1.6× crop	38.4 mm equivalent	1.6×
24 mm lens on 2× crop	48 mm equivalent	2×
28 mm lens on 1.3× crop	36.4 mm equivalent	1.3×
28 mm lens on 1.5× crop	42 mm equivalent	1.5×
28 mm lens on 1.6× crop	44.8 mm equivalent	1.6×
28 mm lens on 2× crop	56 mm equivalent	2×
35 mm lens on 1.3× crop	45.5 mm equivalent	1.3×
35 mm lens on 1.5× crop	52.5 mm equivalent	1.5×
35 mm lens on 1.6× crop	56 mm equivalent	1.6×
35 mm lens on 2× crop	70 mm equivalent	2×
50 mm lens on 1.3× crop	65 mm equivalent	1.3×
50 mm lens on 1.5× crop	75 mm equivalent	1.5×
50 mm lens on 1.6× crop	80 mm equivalent	1.6×
50 mm lens on 2× crop	100 mm equivalent	2×
85 mm lens on 1.3× crop	110.5 mm equivalent	1.3×
85 mm lens on 1.5× crop	127.5 mm equivalent	1.5×
85 mm lens on 1.6× crop	136 mm equivalent	1.6×
85 mm lens on 2× crop	170 mm equivalent	2×
100 mm lens on 1.3× crop	130 mm equivalent	1.3×
100 mm lens on 1.5× crop	150 mm equivalent	1.5×
100 mm lens on 1.6× crop	160 mm equivalent	1.6×
100 mm lens on 2× crop	200 mm equivalent	2×
135 mm lens on 1.3× crop	175.5 mm equivalent	1.3×
135 mm lens on 1.5× crop	202.5 mm equivalent	1.5×
135 mm lens on 1.6× crop	216 mm equivalent	1.6×
135 mm lens on 2× crop	270 mm equivalent	2×
200 mm lens on 1.3× crop	260 mm equivalent	1.3×
200 mm lens on 1.5× crop	300 mm equivalent	1.5×
200 mm lens on 1.6× crop	320 mm equivalent	1.6×
200 mm lens on 2× crop	400 mm equivalent	2×

Frequently Asked Questions

Common questions about Crop Factor Equivalent Focal Length, formulas, and typical use cases.

What is crop factor in photography?

Crop factor describes how much smaller a sensor is than full-frame and how that changes field of view for the same lens.

How do you calculate equivalent focal length?

Multiply lens focal length by crop factor to estimate full-frame equivalent focal length.

Does crop factor change actual lens focal length?

No. The physical focal length stays the same; crop factor changes how much of the image circle is captured.

Can I estimate equivalent aperture too?

For depth-of-field comparisons, photographers often multiply f-number by crop factor as an approximate full-frame equivalent.

Methodology and Review

This page combines a live calculator, precomputed reference values, and FAQ content from the same conversion definition to reduce mismatch between calculator output and lookup tables.

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For compliance-sensitive work, verify final values against project requirements, governing standards, and manufacturer documentation.