Cheating

Bought an HD videocam from ebay, but it only had a digital zoom.

 

So I bought a monocular from ebay and ....

 

Just hand-held but it looks promising so I will build a small mounting to hold it in the right place and try again.

 

www.ebay.co.uk/itm/8X20-small-corner-metal-monocular-nigh...

Done