PINHOLE SIZE TO FOCAL LENTH

"Resource" is an approximation based on material from the Pinhole Resource web site. These values give the "sharpest" pinhole images. You may not always want this. You can be off a little from these values without sacrificing much resolution.

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Pinhole (mm)

FL(mm) Resource

F#

EMSci grid

0.075

4

56

EMSci grid

0.100

8

75

EMSci grid

0.150

17

113

EMSci grid

0.300

68

225

sewing needle #13

0.305

70

229

hobby drill #80

0.343

88

257

sewing needle #12

0.356

95

267

hobby drill #79

0.368

102

276

EMSci grid

0.400

120

300

hobby drill #78

0.406

124

305

hobby drill #77

0.457

157

343

sewing needle #10

0.457

157

343

hobby drill #76

0.508

194

381

hobby drill #75

0.533

213

400

sewing needle #9

0.533

213

400

hobby drill #74

0.572

245

429

EMSci grid

0.600

270

450

hobby drill #73

0.610

279

457

sewing needle #8

0.610

279

457

hobby drill #72

0.635

302

476

hobby drill #71

0.660

327

495

sewing needle #7

0.686

353

514

hobby drill #70

0.711

379

533

hobby drill #69

0.742

413

556

sewing needle #6

0.762

435

572

hobby drill #68

0.787

465

591

EMSci grid

0.800

480

600

hobby drill #67

0.813

495

610

hobby drill #66

0.838

527

629

sewing needle #5

0.851

543

638

hobby drill #65

0.889

593

667

hobby drill #64

0.914

627

686

hobby drill #63

0.940

662

705

hobby drill #62

0.965

699

724

hobby drill #61

0.991

736

743

EMSci grid

1.000

750

750