Best! Dave - 12" f/4.5 mod'ed to truss rod Dob with Telrad. - Explore Scientific ED152CF f/8 Triplet Apo - AP900 GTO mount on a PWT Pinnacle pier - Orion SkyView Pro 100ED f/9 - Celestron Advanced VX mount - Free Turn Q - TV Delos 6mm, HP SV 30mm; Baader Hyperion 8mm,17mm,21mm; Stratus 13mm; ES 82* 4.7mm & ES 70* 25mm EP's... HP 2" 2x Barlow. - Nikon D700 & D7000 DSLRs and lots of Nikon glass
Ken Fiscus- stargazing since 1980. Now observing from a green zone.
Z12 on custom mount, Atomic EQ platform, 100% flocked, OMI primary, Astrocrumb filter slide with O-III, NPB, & skyglow filters. Focuser & spider rotated 45 degrees. New springs & Bob's Knobs, Telrad & 9x50 straight finder 35 & 24 Pans, TV 13,7,5 T6s
Custom Orion XT10 with piggyback XT4.5 on Round Table EQ Platform
Author of "What's Up" articles for CN Author "Touching the Universe" iUniverse Author "Deep Sky Observing" Springer Author "Nebulae and How to Observe Them" Springer 8" Celestron SCT and Vixen ED 80 on a CGEM Canon T2i camera and lenses for piggybacking
18" f/4.2 homebuilt truss 12.5" f/6 hybrid tube dob
Astronomer for the People. "Taking Chaos out of the Cosmos" "There's an amazing universe all around us...EXPLORE IT!!!" So many galaxies, so little time!
Weltevreden Farm 13 kms west of Nieu-Bethesda , South Africa. Equipment is a Celestron C6, Intes MN61 & MK66, Santel 180 F/10, and Bosma Mak 200mm f/12.
Quote:Is your body leaning forward into a somewhat cramped curl as you observe objects higher than ~45°? I notice the effects you describe while leaning forward while bending my neck backwards during high-azimuth observing. Body builders train themselves to be aware of under ventilation while doing ab curls. The diaphragm becomes overcompressed without our being aware of it because we're concentrating on doing or seeing something else. Ophthalmologists describe the flickering shimmer you describe as retinal noise from oxygen-deprived synapses. Shallow breaths or unintentionally holding the breath while teasing out that elusive faint fuzzy underoxygenates the blood. The quick fix is hyperventilating the way sharpshooters and archers do—three fairly slow, deep breaths followed by a half-exhale and then pulling in the upper ab muscles and holding the breath. This both supplies and squeezes oxygen flow into the blood. It takes a bit of practice to avoid over oxygenating and its dizziness. When I do this, the false shimmer disappears within seconds and I can see a full magnitude deeper in fully black fields for about 15 seconds. While observing with others, I frequently see objects a magnitude or more fainter than my friends. When I described the hyperventilation technique, they see what I do.
Quote:I too use a black shroud to block stray light. And depending upon how dark adapted my eyes get underneath, I see some other things as well. I just write it off as my eye's pupil is so wide, anything is visible.Visual system 'noise'!!! Har-dee-har!!!
--Dawg, the Russell "Akita mani yo." Observe everything as you walk. (--Lakota) Celestron Celestar 8 Standard SCT, f10 Celestron C80ED ref., f7.5 Celestron 80mm Wide View ref., f5 Orion 120ST ref., f5 Criterion RV-6 Dynascope, Newt., f8, (c. 1962) Sears Discoverer 60mm ref., f7, (c. 1973) Celestron Ultima DX 10x50 Nikon Action Extreme 10x50 Tasco 7x35 wide
Quote:I have heard what you're seeing being called "the lumpy darkness" (someone on here said it a few years ago, I think it was). I see it often when out at night. I didn't notice it until my latter years (I'm 63 right now). Maybe it was there all along to some degree, I dunno. It does indeed make me think maybe I'm seeing something else that isn't ther, possibly. I used to think maybe it was the "fabric" of space, for lack of a better term, although I have no idea if there's anything like that to be detected. The talk of visual noise makes sense. I would assume that each of us varies to some degree in how we see it, or even how much we see it.
Quote: are you staring hard at the darkness for a prolonged period trying to see something, as at an eyepiece, or are you letting your eyes wander all over? In experiments trying to determine the minimal stimulus to trigger a visual response, the participants are expecting to see something, and are trying to see something, much as you are at the eyepiece. This leads to false positives. ...in cases of prolonged sensory deprivation, do not people begin seeing all sorts of stuff that isn't there, the brain trying to fill in for what is missing? -geo
"A republic, if you can keep it." Benjamin Franklin
Quote:Hi Dave-Okay, that's interesting. For my part, I notice something like Glenn's scintillating pattern, or perhaps your pointillism--to me, a kind of mottling in the background that is in flux. (With occasional bogus point sources, unfortunately!) Do you recall the nature of the pattern you see? Is it mottled, or striped, or tendril-like, etc?Again, when looking within the band of the Milky Way, who knows what is creating the patterns. There is a general wash of light from thousands of unresolved stars, there is lots of intervening dust, etc., and all this creates subtle patterns, to me often striped--Barnard's "strata." But I don't see this when looking out of the Milky Way. Outside the Galactic plane, I tend to see that eye-brain mottling I mentioned. But I need to pay closer attention, perhaps.Now, Hercules is not far out of the galactic plane, so maybe you were seeing something real. Do you get the same effect in Coma Ber. or Sculptor, for example? And how about within the Milky Way itself? If there is a uniformity to the experience across the sky, I think that is an argument for an eye-brain phenomenon.-george
150mm MCT f/13, 31% CO
"People say I'm in denial. I disagree."
Quote:During my term in the Army I can remember vividly nights while out on a Field Training Exercise(FTX), staring out of a foxhole at the forest during the wee hours trying to detect Rangers tasked with infiltrating our lines, and seeing things "move" when nothing was moving at all.
C10NGT, Z8, 150 Rumak, XLT 150, C6, C5, SW5 Newt, 4.5 Ball, C102GT, C90, ST80, A70LF; 15x70, 25x100; Burgess BV; Paracorr II; T6 2.5, XO 2.58/5.1, Ethos-SX 3.7, Delos 4.5, TV Plossl 7.4-26, BCO 10, Hutech HC 12.5, Sterling 12.5-25, ES100 14, CZJ H 16/25, CZJ O 16, M5k UWA 24, T5 31, Ultrascopic 35, Titan-II 40; Bino Pairs M5k UWA 6.7, Baader Zoom 8-24, M5k SWA 24, TV Plossl 26, RKE 28.7; Zooms NZ 2-4, NZ 3-6, Leica ASPH 8.9-17.8, Baader 8-24; Baader Zoom Barlow, VIP Barlow
Quote:"Lumpy darkness" is exactly it! Great description. I see what looks like a black quilt, mainly black, but with a seeming pattern of light areas. I have assumed, with no real evidence, that it is a background of very distant/faint stars, but I'm not at all sure. I see it through all of my scopes, and even with binoculars occasionally. Is it possibly just an artifact of magnifying a couple of hundred miles of atmosphere, with its dust, smog, etc? Doesn't seem likely, but I just don't know. I am more conscious of it at higher powers, but as I say, I can even see it in binoculars at times. Wish I knew for sure.