Originally posted by starjedi Preorder should be around the same time. The actual arrival depends on the pre-orders. If the demand is high, it might take long for the first round of pre-order to be fullfilled. Nikon used to use this trick to delay their products..
I just saw a post in dpreview:
Je dois vous informer aujourd’hui d’un retard important quant à la livraison de l’objectif Pentax 70-200mm F2.8 que vous avez commandé.
Le fournisseur aurait annoncé le produit trop tôt, donc personne n’en aura en Amérique avant le mois d’avril.
I have to inform you today of a significant delay on the delivery of the Pentax 70-200mm F2.8 lens you ordered.
The supplier has announced the product too early, so nobody will be in America before April.
The original post can be seen in
Another delay for the HD 70-200 f2.8?: Pentax SLR Talk Forum: Digital Photography Review
Anyway, April 2016 seems to be the current best estimate for K-1 and 70-200 F2.8.