Here you are, it is not 600mm deep, nearer 300mm.
I should point out there is a very tall hedge behind and shrubs to left and right.
In other words, it is in a sheltered location.
The enclosure seen above does is not sealed with an optical filter but because it was used pointing downwards no rain got in.
When taking this photo I noticed some snowdrops have already opened so tomorrow I will setup a timelapse box.
Also time to order four more lead-acid batteries (I have six) and try to obtain more cameras that I have used previously.
There will be just so much happening come the Spring.