Selection Inputs
Simulated Crop Comparison
Since the crop factor is less than 1, no crop will be applied. As a result, you will likely see vignetting in the corners.
Calculated Results
| Crop Factor | |
| Effective Focal Length | |
| Effective Aperture (DoF) | |
| Crop Factor with Speed Booster | |
| Focal Length with Speed Booster | |
| Aperture (DoF) with Speed Booster |
About the Crop Factor Calculator
This app is useful for those who choose to use larger lenses to adapt to smaller sensor cameras and want to understand how different lenses, sensor sizes, and speed boosters affect the field of view. If you wish to see how these are calculated, view the spreadsheet version of this app here.
While, most people just getting into cinematography and who come from a photography background will often use their full-frame lenses on smaller sensor cameras and want a similar field of view, it is important to know that most high-level cinema productions use a super 35 format, not full-frame.
* Please note that these calculatons are a rough guide to provide a quick reference to help you decide which camera, lens, and speed booster to choose for your rig. It is unrealistic to assume the results are precisely accurate due to lenses having different sensor coverage diameters along with camera sensors having different internal crop modes. These calculations can be even more complicated once you throw anamorphic lenses into the mix.
Popular / Recommended Speedboosters
-
For most MFT sensor cameras using EF lenses - Metabones
Speed Booster XL 0.64x Adapter for Full-Frame Canon EF-Mount Lens to Select Micro Four
Thirds-Mount Cameras
-
For BMPCC 4K cameras using EF lenses - Metabones
T Speed Booster XL 0.64x Adapter for Canon EF Lens to BMPCC4K Camera
-
For adapting Super 35 cameras to use EF lenses - Metabones
Canon EF Lens to Micro Four Thirds Camera Adapter, T CINE Speed Booster Ultra 0.71x
Magnification (Fifth Generation)
Updates coming soon
- Add options to view different film aspect ratios
Photo credits:
- 12mm - Richard August https://flic.kr/p/YGG4c7
- 14mm - Christophe Bitton https://flic.kr/p/DLPMs4
- 16mm - Spookygonk https://flic.kr/p/o2F6rw
- 18mm - Ref54 https://flic.kr/p/2j2wi5K
- 24mm - Dũng Phạm https://flic.kr/p/FZUe6U
- 35mm - Pavel Kalashnik https://flic.kr/p/25yDQn3
- 50mm - Andrew Xu https://flic.kr/p/gBehct
- 65mm - Wendelin Jacober https://flic.kr/p/PhD41D
- 70mm - Ivan Radic https://flic.kr/p/2hVeQs7
- 85mm - Kristoffer Trolle https://flic.kr/p/2hUfZSK
- 100mm - Viktor K. https://flic.kr/p/2gdDivC
- 135mm - Joseph Greer https://flic.kr/p/6QJUxi
- 200mm - marce-w https://flic.kr/p/DpjELz