Image of the day

From the
ATWB Customer Gallery

The Elephant Trunk

My Account

New to Astromart?

Register an account...

Need Help?

Posts Made By: Dennis Sheridan

July 13, 2006 10:02 PM Forum: CCD Imaging and Processing/Solar System

August 12, 2006 09:39 PM Forum: Birding Optics and Photos

Osprey

Posted By Dennis Sheridan

Very nice in-flight shots, that's a magnificent bird.

August 15, 2006 09:40 PM Forum: Telescope Making

Wider...or...Thicker? Design Question, Not Spam

Posted By Dennis Sheridan

I would say thickerer. I don't think making the ring wider say 2" would have a significant effect on flexture. Where doubling it's thickness would stiffen things up quite a bit.

If you think about a piece of ¼" ply, no matter how wide you make the ring you can flex it pretty easily. Now think about a ½" piece, how much harder it is to flex it. Wha-la

September 4, 2006 08:54 PM Forum: Film Astrophotography - Imaging and Processing

m11

Posted By Dennis Sheridan

Nicely done from what I see. I was going to give my barndoor it's first try on something in that general area of the sky this evening but clouds moved in and trashed that idea.

September 10, 2006 10:04 PM Forum: Telescope Making

Assembling an objective lense

Posted By Dennis Sheridan

Lee: Newport glass has an article about grinding lenses and at the bottom the last few paragraphs tell how join the lenses together.

September 20, 2006 09:06 PM Forum: Home Observatories

Sunroom or covered patio observatory?

Posted By Dennis Sheridan

Eric,

I agree with Tom, a roll over would have the least chance of setting off the HOA. A dome as you show as an alternative in your drawing would probably send them into a cataliptic fit grin , best stay away from that.

October 1, 2006 07:57 PM Forum: Birding Optics and Photos

Green Heron with Frog

Posted By Dennis Sheridan

Very nice, boy that frog has a hefty set of legs on it.

October 2, 2006 08:37 PM Forum: Birding Optics and Photos

Egret Over Salt Marsh Farm

Posted By Dennis Sheridan

Very, very nice. beautiful bird!

October 4, 2006 10:48 PM Forum: Equipment Talk

Field power generation equip

Posted By Dennis Sheridan

You could fashion a box with the back side open for cooling and insolate in with a couple layers of sound deadening material. Then run an extention cord and set it up far enough away that the sound wouldn't be bothersome.

October 6, 2006 10:51 PM Forum: CCD Imaging and Processing/Deep Sky

My first M42 of the year

Posted By Dennis Sheridan

That is magnificent!