hi all,  i am having a bit of trouble finding an answer to this question. i have the wo z73 as well as the adjustable flattener for it. it says in the specs that the back adjust for the flattener is 11.4mm. My question is that is that measurement for the scope, or for dslr?.. since i am using a zwo 183mm.. i am unsure where to place the adjustment on the flattener.. i know the camera requires 55mm and i can cover that i just cannot find any info for the flattener part.  any help would be greatly appreciated. smile