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Observing Reports / Re: Lake Sonoma 9/16/17
« Last post by John Pierce on September 17, 2017, 01:55:42 PM »
I've gotten my best view ever of the veil using a DGM NPB filter, on a 18mm in a 20" f/5 Obsession...  this filter passes deep red in addition to o-III and hbeta, so the parts of the veil that photograph as red/pink show up too, while a pure narrowband O-III filter only shows you the parts that photograph as blue-green.

Observing Reports / Re: Lake Sonoma 9/16/17
« Last post by dnsmiley on September 17, 2017, 11:57:27 AM »
You are probably right, I'm thinking it must not have been an O-III filter, but I thought O-III showed the Veil best? I was impressed with the view.
Observing Reports / Re: Lake Sonoma 9/16/17
« Last post by satterwill on September 17, 2017, 11:25:48 AM »
Filter transmission characteristics can change over time, but are you sure that the 8" achromat was also using an O-III (even then, not all O-III filters have equally narrow passbands) as opposed to something like a UHC or NPB filter that will pass a few other spectral lines as well, resulting in brighter (less dimmed) stars?
Observing Reports / Lake Sonoma 9/16/17
« Last post by dnsmiley on September 17, 2017, 09:43:55 AM »
I observed last night at Lone Rock parking lot at Lake Sonoma. There was a nice turnout, more than a dozen observers and some large scopes including two 20+" StarStructures. This was only my second time at Lake Sonoma, a few people said it was one of the largest gatherings they had seen in this location.

Compared to my first visit two months ago on July 24, transparency and darkness were noticeably worse, probably from residual smoke and haze from wildfires. The Milky Way lacked the clarity and richness I remember, but nevertheless I enjoyed hunting down a few new targets, mainly some globulars in Sagittarius I don't remember seeing before including NGCs 6638, 6528 and 6522 and revisiting favorites M28, M22, M2 and M15. NGC 7331, galaxy in Pegasus, was nicely shown in my C8 at 85x as elongated with a bright central area, but I didn't glimpse any of its companions. I had Barnard's Galaxy NGC 6822 on my list. I thought I glimpsed it with 7x50 binoculars, but couldn't confirm. I could not see it either with the C8 or a TeleVue 76 APO. It will have to await a better night I suppose.

Using my Lumicon O-III filter from back in the 90s, I saw the western portion of the Veil Nebula around 52 Cygni as beautiful "smoke" draping and rising from the star, but the view in my neighbor's 8" achromat of the eastern Veil also with filter was much better, and many more stars were visible. Do O-III filters degrade over time? Mine seemed too aggressive in blocking light.

My friend and I packed up as the Pleiades were rising. Even if transparency seemed a bit lacking, it was a wonderful night meeting some old friends and making new ones, both of the human and astronomical kind!
Observing Intents / Re: OI: CalStar 2017
« Last post by Marko on September 17, 2017, 04:11:19 AM »
I'll be onboard.   

It is now about time for the annual speculations on weather and what not.

See you there,
Observing Intents / OI: Fremont Peak 16 September 2017
« Last post by SeanMcCauliff on September 15, 2017, 06:21:01 PM »
Probably south west lot so I can shield myself from the blinking light.
Observing Intents / Lake Sonoma Saturday 9-16-2017
« Last post by dnsmiley on September 15, 2017, 02:12:02 PM »

I'm planning to observe tomorrow, Saturday 9/16 at Lake Sonoma. I'm bringing a friend and believe there might be 5-10 others also planning to come, so I thought I would post here for anyone who might be interested. Hope to meet new observers!
Equipment Discussions / interesting albeit expensive tent for GSSP etc?
« Last post by John Pierce on September 13, 2017, 06:18:30 PM »
Stumbled onto this...

was originally designed for burning man, camping in the desert in summer, withstanding high winds, intense sun, even dust storms.   Might be overkill for GSSP but its an interesting concept.
Equipment Discussions / Re: Cell Phone Supplier Choices
« Last post by DDK on September 13, 2017, 02:26:49 PM »
Both years, AT&T worked for phone, texts and simple web access, just fine. At Lake San Antonio, to get a cell signal with AT&T, I had to go over to the visitor center and bask in their signal.
Equipment Discussions / Re: Cell Phone Supplier Choices
« Last post by smigol on September 13, 2017, 01:22:42 PM »
Whisper canyon had good cell coverage for ATT in 2016.  I didn't test data speed available, but I do remember posting messages and photos on Facebook via my phone. 
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