Terry Terry McInturff President, Terry C. McInturff Guitars, Inc. SkySpy 10 prototype...10" f6 dual strut dob, premium glass Various ES, TV,UO,Ultrascopic, etc eyepieces 4.250" f4 RFT Newt doubles as SkySpy "finder"
Quote:Hello all,Im sprucing up my old 4.25" f4 newt in order to use it on my dob as a finder and general RFT. I built my scope with the ability to balance this load on the UTA without the need for counterweights. The RFT's primary is a very nice older Edmund and the coatings are in great condition.I know that...being a newt..the RFT will be more "fiddly" than a refractor would be (I have a 60mm f3.6 finder too, as an alternative, not installed at the same time)..requiring collimation which will then offset the aiming with the main scope, but...the EP's of the RFT and the main scope will be in close proximity; Im really looking forward to popping back-and-forth in order to enjoy the two differing views.Anyone else do this?
17.5" Dob "Beta Version"
NP 127 on a CG-5 and CGEM DX
25x100 and assorted other binos
Naglers, Ethos and various others.
Quote:Jon, very true but on a cost per inch aperture basis the newt wins. In addition, Im not nearly as picky about the view in the RFT as I am about the view in the main scope.But you are right, a 4" f4 refractor would be grand!
Quote:When all is said and done, I believe an 80mm refractor makes a better finder than a 114 Newtonian. I just fit a 80mm F/5 with a WO 2 inch Crayford from the parts box. With a 31mm Nagler or 35mm Panoptic, its an awesome widefield scope, somewhere around 6 degrees TFoV.
Quote: To me 6 degrees FOV isn't enough for a finder but it's great as a RFT.