Thanks for some new ideas to me.<quoted text>
We tried the H@ filter, once in a while on galaxies. We found it marginally functional on hot new stars in dark molecular clouds in some very near galaxies. But most often it raised contrast by eliminating lots of wavelengths. Generally, with our smaller scopes & desire to see far distant 12 to 15+ magnitude galaxies, that precluded the use of the H@ filter.
The H@ filter is spectacular on a star 8 light-minutes away......... not so good on stars 300 to 500 million light-years distant, even 100,000 stars burning in the ultra-violet.
Never got the opportunity to use the H@ filter on a 40inch Dobsonian telescope on some of those near-by galaxies.
Dec 30, 2012 | Posted by: roboblogger | Full story: Sacramento Bee Newspaper
Seeing "Chasing Ice," a new movie that chronicles the rapid disappearance of the world's glaciers as man-made climate change proceeds, I was reminded of Francis Ford Coppola's "Apocalypse Now." In "Chasing Ice," we watch transfixed at the beauty of ancient ice mountains larger than Manhattan falling into the sea even as we are struck by the horror ... (more)
Comments (Page 2)
14 Users are viewing the Sacramento Forum right now
|White Guys: Would you date a black girl? Elaborate (Nov '07)||1 hr||Sgt Peppers||5,210|
|CA Judge overturns California's ban on same-sex ma... (Aug '10)||3 hr||Transfatter Ohio||200,204|
|CA California seeks to ban free, single-use carryo... (Jun '10)||12 hr||Punk a s Murabito||4,834|
|The Corner Coffee Shop: The new NOTHING Thread (Jan '08)||15 hr||GreyMustang||6,647|
|editorial: California must improve vaccination ...||Tue||Provac Plopaganda||1|
|Horny||Tue||Helen of T||2|
|jammy wants a three way||Jul 6||sgt pekkers||3|