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[-=CROMAN=-]

What do you guys think about this?

www.sunguntelescope.com/MAIN.html

I've got a huge Da-Lite rear projection screen that I attach to my garage in the summer to show movies on. There is enough material on it to allow us to create one of these sunguns and still allow me to show movies.

This design is perfect for group viewing. I'd be willing to help make a few of these units. They would be great for the CA arsenal.

[Paulie pchris00]

I hadn't seen the Sun Gun before, but I've seen the variations of the idea. For the transit, I want to have a closed device when doing projection viewing. I was going to make a "Sun funnel."

transitofvenus.nl/wp/observing/build-a-sun-funnel/

Number four on this list also shows a closed projection system.

transitofvenus.nl/wp/observing/six-ways-to-see-the-transit/

Needless to say, I approve.

[-=CROMAN=-]

I like the funnel idea. These are awesome projects to work on this winter.

[Paulie pchris00]

I'm probably going with the funnel, but I love that huge image from the Sun Gun.

Are you planning on making this a solar scope?

elenin.paranomalo.us/2011/11/sears-discoverer-3-model-4454-restoration/

[Chicago Astronomer - Astro Joe]

I have seen the cool SunGun a few years ago and dig it.

It's well worth building a similar device, not just for the June event, but to show year round.

Winter will be busy for us.

[Paulie pchris00]

Dec 6, 2011 13:40:13 GMT -6 Chicago Astronomer - Astro Joe said:

It's well worth building a similar device, not just for the June event, but to show year round.

*sheepishly*

Well, yeah, but since Venus reappeared in the evening sky, I've had pretty much only had one thing on my mind.

Truth be told, I'll be relieved when it's over.

[magic612]

I've seen the Sun Gun, but worried about the size becoming like a "sail" if there's even the tiniest breeze. I like the funnel idea - Paulie, let me know if you want to go in on getting some of the material needed for that. Or can we use what Rich has? Either way, don't need much!

[erikruud]

I just saw these today. It looks like an interesting variation.

Sun-In-A-Box

Projected view

Side View

I wonder about the longevity of the secondary though.

[Paulie pchris00]

Apr 2, 2012 11:11:12 GMT -6 erikruud said:

I just saw these today. It looks like an interesting variation.

I wonder about the longevity of the secondary though.

I was thinking the same thing. I think it's a single plastic spider vane holding the secondary. Get that just a leetle bit out of collimation, and watch it melt, and bye, bye secondary.

Interesting concept, though.

[-=CROMAN=-]

Joe... Would your astro shop be open to a day of sun gun making before this event?

[Chicago Astronomer - Astro Joe]

Good possibility on building this.