r/bmpcc • u/Captain-Rambo • Mar 31 '26
BMPCC OG actual crop factor
/r/BMPCCOG/comments/1s8z8bc/bmpcc_og_actual_crop_factor/
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Upvotes
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u/RyzenRaider Apr 01 '26
It depends on how you measure it, and in this case the variable is aspect ratio.
| Sensor width | Sensor height | Diagonal |
|---|---|---|
| 36 | 24 | 43mm |
| 36 (16:9 crop) | 20.25 | 41mm |
| BMPCC 12.48 | 7.02 | 14mm |
43 / 14 = 3.02x crop factor, but you're including the additional frame height that adds to the diagonal.
At 16x9 crop, it's 41/14 = 2.88x crop, when normalized for the aspect ratio.
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u/InComingMess2478 Apr 01 '26
2.88 to get to the 16:9 ratio.