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#1
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this is the final of the three images from my fremont peak outing last
night. this is 4 x 20 minutes with Baader Halpha filter, FLI IMG6303E camera and Pentax 150mm f/2.8 medium format (6x7) camera lens http://www.narrowbandimaging.com/m24...03_bp_page.htm |
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#2
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![]() Richard Crisp wrote: this is the final of the three images from my fremont peak outing last night. this is 4 x 20 minutes with Baader Halpha filter, FLI IMG6303E camera and Pentax 150mm f/2.8 medium format (6x7) camera lens http://www.narrowbandimaging.com/m24...03_bp_page.htm Sagittarius, Cygnus, Cepheus can't be up yet. I haven't finished Virgo! Looks like you had a productive night. Narrow band season is upon us already! We lost a few more trees. Firewood for next winter is piling up faster than I can cut and split it. No rain, just winds. Though we did get a bit a few days earlier. Nice clear day but clouds are trying to roll in tonight. Clouds forecast by morning. I lost this entire month it appears and less than an inch of rain to show for it. Was enough I could just barely get the boat onto the lift after the rain. Don't know if I'll get it off again as lake is headed down rapidly as it feeds the water table. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#3
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You need to move to this location! Great images all Richard.
-- Regards, Doug W. www.photonsfate.com "Richard Crisp" wrote in message t... this is the final of the three images from my fremont peak outing last night. this is 4 x 20 minutes with Baader Halpha filter, FLI IMG6303E camera and Pentax 150mm f/2.8 medium format (6x7) camera lens http://www.narrowbandimaging.com/m24...03_bp_page.htm |
#4
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Very amazing picture.....
.....you are encouraging me using the SIGMA 150 F2.8 with my SHV-H9C !!! Seeing permitting... Regards -- -- Fabio Acquarone Website: http://www.fabioh2o.it Email : "Richard Crisp" ha scritto nel messaggio t... this is the final of the three images from my fremont peak outing last night. this is 4 x 20 minutes with Baader Halpha filter, FLI IMG6303E camera and Pentax 150mm f/2.8 medium format (6x7) camera lens http://www.narrowbandimaging.com/m24...03_bp_page.htm |
#5
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![]() "Fabio" wrote in message . .. Very amazing picture..... ....you are encouraging me using the SIGMA 150 F2.8 with my SHV-H9C !!! Seeing permitting... thanks Fabio The seeing really plays little role in this: I am imaging at 12+ arc-sec/pixel, so the seeing can be quite bad and it makes no difference in the widefield image. I just need good clear skies, that's all. I had 2/3 of the moon up in the sky making things bright too. Regards -- -- Fabio Acquarone Website: http://www.fabioh2o.it Email : "Richard Crisp" ha scritto nel messaggio t... this is the final of the three images from my fremont peak outing last night. this is 4 x 20 minutes with Baader Halpha filter, FLI IMG6303E camera and Pentax 150mm f/2.8 medium format (6x7) camera lens http://www.narrowbandimaging.com/m24...03_bp_page.htm |
#6
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Nice imaging job here Richard! wow what a stars here..
The long nights are over here, 2, 3hrs at the most fore darkness, time for the maintenance season on the equipment. But i love watching you guys imaging. reg Dirk -- Dirk van den Herik A journey of thousand lightyears starts with the first step. "Richard Crisp" wrote in message t... this is the final of the three images from my fremont peak outing last night. this is 4 x 20 minutes with Baader Halpha filter, FLI IMG6303E camera and Pentax 150mm f/2.8 medium format (6x7) camera lens http://www.narrowbandimaging.com/m24...03_bp_page.htm |
#7
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at solstice I get about 4.5hours dark Dirk. But don't let it stop me
"DvdH" wrote in message el.net... Nice imaging job here Richard! wow what a stars here.. The long nights are over here, 2, 3hrs at the most fore darkness, time for the maintenance season on the equipment. But i love watching you guys imaging. reg Dirk -- Dirk van den Herik A journey of thousand lightyears starts with the first step. "Richard Crisp" wrote in message t... this is the final of the three images from my fremont peak outing last night. this is 4 x 20 minutes with Baader Halpha filter, FLI IMG6303E camera and Pentax 150mm f/2.8 medium format (6x7) camera lens http://www.narrowbandimaging.com/m24...03_bp_page.htm |
#8
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Richard, amazing depth for the rather short (at least by your standards)
exposure time. Maybe the long time for each exposure does the trick... Stefan "Richard Crisp" schrieb im Newsbeitrag t... this is the final of the three images from my fremont peak outing last night. this is 4 x 20 minutes with Baader Halpha filter, FLI IMG6303E camera and Pentax 150mm f/2.8 medium format (6x7) camera lens http://www.narrowbandimaging.com/m24...03_bp_page.htm |
#9
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it doesn't hurt to take longer subexposures.
i like to get my signal's square root quite a bit bigger than the read noise so that I am shot noise limited instead of read noise limited. My camera is in the 9 electron range for read noise and m y gain is about 2.1 electrons per ADU so long as i have 81 or more electrons, which is in the 200 or so ADU range (after bias/dark subtraction) then I meet that criteria. usually I just shoot 20 or 30 minutes and sometimes will go 45 minutes. I stopped at 20 to prevent bad star blooming. "Stefan Lilge" wrote in message ... Richard, amazing depth for the rather short (at least by your standards) exposure time. Maybe the long time for each exposure does the trick... Stefan "Richard Crisp" schrieb im Newsbeitrag t... this is the final of the three images from my fremont peak outing last night. this is 4 x 20 minutes with Baader Halpha filter, FLI IMG6303E camera and Pentax 150mm f/2.8 medium format (6x7) camera lens http://www.narrowbandimaging.com/m24...03_bp_page.htm |
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