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Hi! I am looking for a couple of filters to use as a version of a Hubble palette on my imaging setup (8" Orion Newtonian Astrograph, Orion Atlas GEM, Orion SSAG, Nikon D3200, and Baader MPCCII). I plan on getting a Hydrogen alpha filter, an oxygen 3 filter, and a sulfur 2. I plan on getting a ccd soon, I know a dedicated sensor array is going to turn out much better results, but first I want to milk every drop out of my nikon. Now, the coma corrector I use with the nikon only accepts two inch filters, unless I were to add an adapter that holds a 1.25 inch filter, such as the blue fireball 2" filter male thread to 1.25" female thread adapter found here: http://agenaastro.com/blue-fireball-m48-male-m28-5-female-adapter-m-01.html . My main question is, will a filter setup like this impede the amount of light reaching the sensor? I would like to buy Orion's 1.25 filter set [ http://www.telescope.com/Orion-125-Extra-Narrowband-Tri-color-CCD-Filter-Set/p/24609.uts ] 1.) because it contains all three of my choices, and 2.) because I know that the 1.25' filters can fit on any imager or telescope to which I currently have access. Let me know if this seems like a decent plan. Thanks a lot! Costas Soler