narrowbandimaging at Yahoo! Groups

Blending different exposures

dale.liebenberg — Wed, 10 Feb 2010 05:48:55 GMT

Hi, I am busy imaging M42 at long and short exposures with the intention of using the shorter exposures to blend out the overexposed trapzium section. As I

links Re: [NBI] first post: distribution of narrow band

astrowhwiii — Tue, 09 Feb 2010 20:55:32 GMT

thanks richard great stuff. loved the S&T article something cool about the concept of the crab in SII Ha NII Ha as luminance: OK this example seems to

links Re: [NBI] first post: distribution of narrow band

rdcrisp — Mon, 08 Feb 2010 11:54:58 GMT

I found a hot spot so here are a few links that may help article I wrote (the first so published) on the topic of eline imaging. It was in S&T in Aug of 2005

Re: first post: distribution of narrow band signal emission in nebul

Richard Crisp — Mon, 08 Feb 2010 11:22:59 GMT

I will make the brief as I Am on an iPhone Don't use ha for luminance for tricolor eline To see why look at my website under Technology for the link about why

first post: distribution of narrow band signal emission in nebulae?

astrowhwiii — Mon, 08 Feb 2010 08:31:34 GMT

hello narrowband imaging just got an SII filter in october and have many questions so please bear with me if they're basic looking at the Ha, SII and OIII

Re: Glory Photos from 37,000 feet

Paul Kent — Sun, 07 Feb 2010 16:32:23 GMT

either the 145/135 i guess...the 170 holds more, around 80-90. I know delta have 170's, hence why i asked if you flew with them the 145 holds 50 pax.....

Re: Glory Photos from 37,000 feet

Richard Crisp — Sun, 07 Feb 2010 16:24:21 GMT

couldn't tell you which model. It maybe would hold 50 people one seat on one side of the aisle and two on the other side. I was flying American ...

Re: Glory Photos from 37,000 feet

Paul Kent — Sun, 07 Feb 2010 16:18:25 GMT

yep, which model?.... i got the 170 and 190 here in FSX....love them...... did you fly delta? (i love flying just a bit too much! :) one of out instructors at

Re: Glory Photos from 37,000 feet

Richard Crisp — Sun, 07 Feb 2010 16:11:50 GMT

EMB regional jet made in Brazil ... From: Paul Kent Subject: Re: [NBI] Glory Photos from 37,000 feet To:

Re: Glory Photos from 37,000 feet

Paul Kent — Sun, 07 Feb 2010 16:07:04 GMT

Do I spy a T-tail? what were you flying Richard? ________________________________ From: rdcrisp To: narrowbandimaging@yahoogroups.com

Re: Tadpoles Nebula, IC410.

Cesar Cantu Quiroga — Sun, 07 Feb 2010 15:55:59 GMT

Hello Richard: Thank you very much by this information. It seems a system that there is to prove with many frames short, because thus, signal will be obtained

Glory Photos from 37,000 feet

rdcrisp — Sun, 07 Feb 2010 15:01:59 GMT

Yesterday, Feb 6, I was approaching Pensacola Florida working my way to the Winter Star Party 2010 and happened to notice a Glory outside the window. These are

Re: Tadpoles Nebula, IC410.

Richard Crisp — Sun, 07 Feb 2010 13:21:46 GMT

2.5hours x4= 10hours equivalent exposure

Re: Tadpoles Nebula, IC410.

Richard Crisp — Sun, 07 Feb 2010 11:53:55 GMT

So long as you have enough signal to not be read noise limited, summing (binning) 2x2 on-chip will give 4x the signal, doubling the SNR, in a given exposure

Re: Tadpoles Nebula, IC410.

Cesar Cantu Quiroga — Sun, 07 Feb 2010 04:03:51 GMT

Hi Alvaro: Tks. Yiu can see the larger version here. Grettings. César ... From: Alvaro Gaviria Subject: Re: [NBI] Tadpoles Nebula,