Today's boot sale bargains

A lot of cheap photographic stuff:

Five polarising filters in various sizes, a uv filter, a lens cap, and three Cokin effects filters for a fiver.
Five Nikon focusing screens for £2
A wide angle converter of the type I wanted to try for a fiver - first opinion, much more circular image but not incredibly sharp, but I need to try it in good lighting, not twilight.
A Minolta-fit Centon 50mm 1.8 and Jessop 2x converter, with all caps and cases, for a tenner.

An iPod charger (real, so far as I can tell) and two plugs for £1.50

And an early Raspberry Pi for £2 - which unfortunately doesn't work, unless I'm missing something, but since the same vendor sold me most of the filters I'm not going to worry much. I'm getting a red light when I power it up, is that normal? Will it work without a memory card plugged in?

Later - thanks to history_monk the Pi is in business!

Fisheye converter

This is a trial picture from the fisheye converter, mounted on my 17-55mm lens zoomed wide. A nice circular effect but not incredibly sharp - and as is probably obvious, flash doesn't work very well because

(1) it doesn't cover such a wide field very well so is brightest in a band across the width of the image and
(2) the converter and lens cast a shadow in the bottom middle of the picture.

I think it isn't at all bad for a fiver, but the Lensbaby is definitely sharper.