In my opinion, Richard Galli is the best.
https://www.eosforastro.com/infrarouge/defiltrage-dun-apn-avec-filtre-infrarouge-ir-schott-details
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In my opinion, Richard Galli is the best.
https://www.eosforastro.com/infrarouge/defiltrage-dun-apn-avec-filtre-infrarouge-ir-schott-details
Merci bien !
So far I've found online a few services in UK and Germany, and Richard's service is definitely the most expensive I've seen so far :) Must be the best ;)