Birthday time again, what to buy?

[Peco4321]

It's that time again and my thoughts are on what I can spend my birthday money on. My wife generally leaves it to me now to choose something Astro related, so I'm thinking maybe a 3 x Barlow, and/or Baadar filter.

Thoughts on this, and how would I attach my dslr for lunar and planetary photography. 

https://www.tringastro.co.uk/celestron-x-cel-lx-3x-barlow-612-p.asp?gclid=EAIaIQobChMIzMvNhNrX2wIVqLDtCh1NIQ7LEAQYASABEgKVVvD_BwE

 

 

[Knighty2112]

Looks like 3x Barlow is reduced on FLO site to match!