Extremely well made CNC Machined Aluminium part, though very expensive for what it is, However fitted properly and very strong to hold the Quark and a DSLR (though when ordering this adapter you need to invest a T-Ring for your camera, in order to fit the whole set-up to the Quark Eyepiece) With the Quark's in built 4.2x Barlow lens makes it difficult to achieve a widefield, this item is crucial if you want a Full disk Hydrogen-Alpha view of the Sun, with a short-focus Refractor (400mm or less) and no vignetting around the Field of View on the Sun. Defo worth the money though could be slightly cheaper in the long run!!

Well made and sturdy, easy to fit on the quark.
Does what it says on the tin.
I just don't understand why the Quark doesn't have a T thread from the outset as its a lot of money for a T adaptor
Clear skies and stay safe