My main issue has always been humidity and rapidly changing temps. If your detached garage is well insulated and doesn’t seen moist, covering your scope with possibly a mirror heater or dehumidifier m

Thanks Myron! Hope to see it on next clear night. By the way, I donated a older SBIG self-guiding spectrograph to BAS a month or so ago. If you want it, you may be able to contact Fred to ask for it.

depends on many things (scope, observing interests, etc.), but I will take a stab in the dark and say a 13mm (many great options out there), of the same "class" as your 20. ---------------------------

Hello Don: For the horsehead, I was shooting 5 min subs in Ha light for a total time of about 2 hr 40 min. The narrowband filters are very narrow and only let in a small fraction of the total spectrum

Thanks Bob! -----------------------------------------From: "Bob Sieber" To: main@bas-astro.groups.io Cc: Sent: Tuesday March 9 2021 4:04:42PM Subject: Re: [bas-astro] hydrogen alpha horsehead from ton

Thanks Myron! I might be able to try a bit more tonight if the weather holds... Regards, Bob -----------------------------------------From: "Myron Wasiuta" To: main@bas-astro.groups.io Cc: Sent: Tuesd

Thanks for the galaxy and glob pics Myron. Time to switch my scope on my mount for one with a bit more focal length (probably my 9-1/4 f/10 until my Hyperion 12.5 f/8 comes back from the spa). Regards

thanks Fred -----------------------------------------From: "Fred Rains" To: main@bas-astro.groups.io Cc: Sent: Monday March 8 2021 11:34:25PM Subject: Re: [bas-astro] hydrogen alpha horsehead from ton

The attached is my last "nebula" for the season, as we go into galaxy season... Got about 2.5 hours in hydrogen alpha with my 8 inch f/2 RASA and ASI1600MM before the tree ate it.... Regards, Bob

It will be interesting as I have never combined images from different filters before. Time to figure out next step with PixInsight!

Very nice Wayne. I remember this from before and was an inspiration for me to give it a try! Regards, Bob

The attached Rosette Nebula in O3 (2 hrs total with 3 min subs). The soul had very little O3, even with 2 hrs, may try to add more to that later next week along with the S2. The Rosette O3 is quite a

Hello Myron: Those were taken with my 8 inch RASA (I got it for star parties that I didn’t get to last year, so it is on my main mount now while my larger home scope is being refitted). I have an 11 i

Thanks Myron; definitely turtle-like. Getting O3 now (not nearly as bright as the Ha though) Regards, Bob

Hello folks: Finally clear (and cold) skies last night…. The two attached are hydrogen alpha narrow bands of the soul and rosette nebulas. I will take oxygen 3 tonight and sulfur 2 next clear night. T

Beautiful image Scott! Can’t wait to see it with the Ha also. Regards, Bob

Probably a combo of both… would be interesting to add hydrogen alpha too as the L channel! Regards, Bob

Interesting detail Myron! Normally can’t see that in M82. Regards, Bob

Here is a hydrogen alpha with a 300 mm lens at Coona of the Large Magellanic Cloud I took a couple of years ago. Regards, Bob

Beautiful Scott!