Monthly Archives: October 2016

Info: New Project – Infrared Modified Canon Powershot n

Canon Powershot n

Canon Powershot n

Canon Powershot n

New little project – a 590nm converted Canon Powershot n. A quirky little, and I mean little, 12MP style camera from 2013.

Canon Powershot n

Canon Powershot n (1)

The conversion was done by the very helpful Andy from Infraready and arrived today.

The real attraction here is the camera’s size and weight, given its life is to go up high on various kites; however, it has some basic drawbacks straight out fo the box: no RAW, no custom white-balance and no external time-lapse remote. All of which would normally make it a very unsuitable camera for IR work, however, the CHDK (Canon Hack Dev Kit) community have done their magic and there is a port for the little Powershot n.



Unlike my old Canon S90, which refuses to comply (even though it should), the newer Powershot n was ever so easy and quick. CHDK went on in under 2 minutes! I just downloaded the correct software version, unzipped it to micro-SD card (newly formatted) and put the files in the root directory. Then the little (I am going to keep using that adjective because the styling and size fascinates me) camera is started using the ‘MOBILE CONNECT‘ button (NOT the off/on button), followed by the MENU button (on the screen) and a menu option to firmware update… and hey presto, there is CHDK (use the MOBILE CONNECT button again to bring up the CHDK menu).

CHDK on the Powershot n screen

CHDK on the Powershot n screen

RAW Capture

Why this is important is that, amongst a whole list of new features it adds, it allows the camera to produce (for offloading) RAW and DNG files, which can then be correctly white-balanced; although it important to note that the “RAW” format is not true to Canon’s CRW and CR2 formats. Capture One, however, seems to have no problem in reading in the DNG files and allowing the white-balance to be adjusted, so all good so far.

Canon Powershot 2

Canon Powershot n (2)

Intervalometer Time Lapse

In addition to now being able to capture RAW files, CHDK can also run custom scripts, importantly for me intervalometer scripts for time-lapse. There are a number of scripts for intervalometer time-lapse, so far I have just used the simple Countdown Intervalometer script – which worked just fine.

CHDK Countdown Intervalometer

CHDK Countdown Intervalometer

It is simply a script file that is downloaded to the scripts directory (the install instructions are on its Wiki page – use the link above or the reference at the end of this post) and allows you, via the CHDK menu on the camera, to set the number of shots you want (inc infinity if you want) and the interval; which is all I need when the camera is swinging around under a kite.

Canon Powershot 4

Canon Powershot n (3)


  1. The way I load CHDK is only temporary and needs to be initiated after each session/use – once the photos have been taken and the camera turned off, CHDK is lost. The next time, if you start on the mobile button it is back to trying to connect to a Wifi network (its original function). To reload CHDK again, the DCIM folder with the photos just needs to be deleted (after downloading) and the load process using the MOBILE CONNECT button used again. I believe there are ways to have it loaded permanently, which I will look into, but for now being temporary is fine.
  2. This is all for the original Powershot n and not the later Facebook branded version, the “Powershot N Facebook®“. Installing CHDK on the Facebook version apparently is a little different, as they used the MOBILE CONNECT button for their specific Facebook upload.


Canon Powershot n


CHDK & Powershot n

  • (download versions page)

CHDK Raw Formats


CHDK Intervalometer Script (time-lapse)



Images: The City & Globe theatre

I am back doing a little travel with work and carrying the little 660nm modified Olympus PM2 with me. The view of the city and Globe theatre yesterday, from Blackfriars bridge, London. processed at 2065K (WB) and Channel-swapped for the blue sky.

City & Globe - 660

City & Globe – 660

Although I would not give up full-spectrum, and the hassle of having to use lens filters, there is something nice about just working with a single frequency and snapping away.

This image is also a good reminder why it can be so important to tweak the white-balance post shot processing. The image below, using the accompanying JPEG, shows what the in-camera WB setting would have turned out if channel-swapped. Manually setting and testing the WB temperature can have a lot impact on the final image.

In-camera JPEG

In-camera JPEG

Images: Richmond

Some mixed-band snaps of Richmond, using a Schott BG3 filter with a full-spectrum Sony a7ii. Processed at 3470K (white-balance). No channel-swap. The first two are using a Nikon AI-s 135mm lens and the third with a Voigtlander 20mm (bone using the Metabones E-Mount-Nikon adaptor)

Richmond 1 - BG3

Richmond 1 – BG3

Richmond 2 - BG3

Richmond 2 – BG3

Richmond 3 - BG3

Richmond 3 – BG3