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Posts Made By: Ivan Ong

July 25, 2005 12:40 PM Forum: After Dark

Chemical-Free Mosquito Repellent

Posted By Ivan Ong

If you observe near a 110V outlet, just plug in a decently strong floor/table fan and point it at yourself. That would keep mosquitoes away and be refreshingly nice at the same time for it's summer. I do this when I go out in my backyard at night and almost never get bitten.


August 4, 2005 06:06 PM Forum: Digital SLR AstroPhotography

The Traveler's Swan

Posted By Ivan Ong

Here is the Swan nebula with my AP Traveler at prime focus. Canon 20D, ISO 1600, 6x5min. Guided with a STV on a TV60mm. Mount: EM-200.

A rare Carolina night with clear steady skies!

Thanks for looking!

August 7, 2005 02:56 AM Forum: Equipment Talk

ok, how do I clean this?

Posted By Ivan Ong

Well, I had some minor dust on my ToUcam chip that should have been no big deal except for the fact that it is right smack on the center. So I blew it with an air bulb, did not work. Then I dipped high purity HPLC-grade acetone with a cotton swab. The spot was gone but surprise surprise a gazillion things were left because I used the cotton swab. So back to the air bulb, but now I have 4 dust particles left.

What is the best way to remove this dust? How do the manufacturers do it commercially?


September 2, 2005 01:19 PM Forum: CCD Imaging and Processing/Deep Sky

NGC 7027 anyone?

Posted By Ivan Ong

Hi, has anyone taken a photo of PN NGC 7027 in Cygnus? I was out with my 9.25" the other night and really enjoyed the wealth of faint details visually (very light polluted). There appeared to be two lobes, and one of the lobes has a sharp brightening at the edge, almost like a wedding ring, almost seems like an embedded star. And there seems to be a dark rift between the two lobes. I was wondering if anyone has taken a pic of this, would like to see how that looks like. Thanks, Ivan

September 3, 2005 02:57 PM Forum: Digital SLR AstroPhotography

Veil with Tak Sky 90

Posted By Ivan Ong

Hi all, took this last night in Doughton Park, NC. It was so gusty that my STV went bonkers, so I just turned it off and took 7x5min frames unguided and combined them. I was surprised how stable the EM-200/Tak 90 combo is! Camera was a normal 20D. I was using a flattner/reducer with the Sky 90.

September 3, 2005 03:42 PM Forum: CCD Imaging and Processing/Deep Sky

Yet another NA Nebula!

Posted By Ivan Ong

This one I shot last night under ridiculously gusty conditions. I had to turn off the autoguider, and took 8x5min photos with my Canon 20D. Scope was a Tak 90 with reducer, on the EM-200. I was surprised how nice the 8 unguided frames turned out. I combined them in MaxIm DL and here it is. Let me know if you think processing was over the top. Hard to tell for this red-drenched region.
Thanks for looking! Ivan

September 5, 2005 11:07 PM Forum: Digital SLR AstroPhotography

M31 with A-P Traveler

Posted By Ivan Ong

Taken with A-P Traveler with reducer, 8x 5min ISO 1600 Canon 20D. Not sure how to process this, comments welcomed. Thanks for looking.

September 8, 2005 02:41 AM Forum: Digital SLR AstroPhotography

M45 with A-P Traveler

Posted By Ivan Ong

Canon 20D, reducer, A-P Traveler. 8x5min frames, ISO 1600, MaxIm DL and Photoshop.

Thanks for looking!

September 9, 2005 02:43 AM Forum: Equipment Talk

Pronunciation of "Questar"

Posted By Ivan Ong

Ok, is it Quest-Star or Kway-Star? Don't want to embarrass myself...thanks. Ivan

September 10, 2005 09:15 AM Forum: CCD Imaging and Processing/Solar System

Mars feature or CCD dust?

Posted By Ivan Ong

Hi all, just captured this with my webcam, 3X, C9.25". Is the center dark spot feature a dust speck on my CCD or a real Martian feature? Thanks very much, Ivan