Shane in black-zone New Mexico
Quote:Comments: These things are bloody heavy! I had to balance all the 'scopes for these EPs, and had to set the clutches quite tight to avoid a nose-dive when I changed EPs. I was not comfortable with that, especially when using another person's EP. I cannot see myself routinely using such a massive EP. Another reason is that I am not a wide-field bloke. I use a wide-field as a finder and then I start bumping up the magnification. I can sort-of understand the allure of aimlessly sweeping the Milky Way, but I may only do that 1/year.
10" F/4.7 Modified Skywatcher Reflector, 38mm Orion Q70, 17mm Modified Ultima LX, 10mm TeleVue Delos, 7mm Pentax XL.
My eyepieces are made from the waste product of exploding stars. 10XTi 102XLT ST80A(2" Focuser) XW: All; XO: 2.58 Televue: Naglers-T1 Smoothside-full set, 17T4,12T4,Ethos 17,4.7; plossels-40,32,20,17,&7.4mm; Pans-22,24mm; Delos-6,8,12,17.3mm ES100: 5.5,9*,14,20 ES82: full set ES68: 16,20,24,34 NLV: 5,9,10,15 Ortho: HD-7,9; OPS-9,12 Meade RG 7mm Other: Pentax 12.5K(.965), 10mm Parks Zoom: Nag3-6 *=on b/o DAS Dark Site
Quote:Fast Reflector Views: Things become less rosy in a fast Newt (here, my 6" f/5). In both EPs I noticed a darkening in the outer 10% of the FOV that I interpret as vignetting from the unbelievably large 1.81" secondary. That surprised me. But having said that, I did not see the shadow of the secondary, which further surprised me.