/diy/ - Do It Yourself

Anonymous Sat Jun 16 20:51:10 2018 No.1407609 [View]
File: 1.34 MB, 2048x2724, Invasive Pinhole Cap Mark I - 23.5mm FL - DSC_1458a.jpg [View same] [iqdb] [saucenao] [google]

>>1407608
This pinhole cap is similar to the recessed pinhole cap, but differs in a major way. This one goes even deeper. In fact, I have to raise the mirror up using "liveview" setting then install the cap on the camera. The falling mirror is just spring loaded so it doesn't break when bouncing on top of the pinhole cap. I call this an, "Invasive Pinhole Cap". I have since dismantled this one for parts, but I'll probably rebuild one at this focal length since it is pretty nice for a pinhole FL.

Focal Length: 23.5mm (35.25mm equivalent on 1.5x crop)
F-stop: f/120
Optimal Pinhole Diameter: 0.2042mm
Actual Pinhole diameter: 0.1957 (0.2042mm is optimal, error of 0.0085mm; best for 21.5mm FL)

Image Diameter: 45.1mm
Invasive into Camera Body to: 23mm
Angle of View: 36.7 (on 1.5x crop)
Sunny Day Exposure: 1/2 second at ISO 100

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/diy/ - Do It Yourself

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