Upgrading the Raspberry Pi camera..

Although the stock lens is sharp ..... it lacks that spycam aspect.......

There are loads of fixed lenses out there ... however nothing beats a good zoom lens.

Ebay Search string (F1.8 1/3 Inch CS Mount 5.0-100mm DC Auto IRIS Manual Zoom CCTV Lens)

My Very Quick delivery came from eprid.security

Specs :-

F 1.8

1/3" CCTV Lens

5.0 mm - 100.00 mm

With a direct drive 2 coil Iris for adjusting light levels

I made a custom 3D printed adaptor.... version 2 :-

The direct drive Iris has a drive coil and a damping coil.

By default the Iris is closed (so no power .....no lens) ... Its a simple job to open the Iris by applying 6 to 16volt signal (@35mA)... That opens the Iris "Wide" .... I plan to PWM the 2 coils for better control.

The Zoom and Focus rings will be easy to automate ... however I am clueless how an auto-focus system works....


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GroG's picture

Really looks sharp Gareth

How fast (FPS) is the raspi cam ?

Gareth's picture

Difficult Question ......SD dependant

Hmmm you need the fastest SD out there if you want good fps. (ie vga 90fps)

Qoute :- Prior to March 2014, video mode did not use the full sensor area (only a 1920x1080 center crop), and there was no video mode faster than 30 fps. With new firmware as of March 18 2014 the camera has a full-sensor 2x2 binned video mode, and also can do 640 x 480 up to 90 fps.

I have noticed that my cheap ebay cards do stutter a bit so the faster the better....

Qoute :- SD card class. The card class determines the sustained write speed for the card; a class 4 card will be able to write at 4MB/s, whereas a class 10 should be able to attain 10 MB/s.

cahbtexhuk's picture

CS Drive lens

Have you managed to do anything with the DC Iris drive?
There's a metric tonne of great cheap CS-mount lenses and they work perfectly with a pi hq cam, but absolutely no projects to drive the iris from the pi