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I received a reply to my enquirey about the fitting to manage tilt and back focus from the USA..$1200 US plus maybe $200_$300 postage.
I am test imaging right now and happily moving the filter drawer close to the camera seems to have made things better..there is a pertrusion of an internal ring that means you can not insert a filter drawer unless you back it off a couple of turns, which I do, insert the drawer and tighten it up which holds the filter drawer in nicely which is good because I worry about the filter falling out as the magnet does not seem very powerful..in any event things are much better such that I do not feel inclinded to buy the fitting from the USA at this point. A simple solution is to crop the image or to work with a smaller sensor size...not ideal but at least you never realise the crook stars are there..anyways right now the stars seem ok but the cloud is coming in and out so not ideal for testing.
Alex
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