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Posts Made By: Ivan Ong

December 17, 2004 02:10 AM Forum: Deep Sky Observing

A glimpse of Canopus

Posted By Ivan Ong

Last night it was still, clear and cold (12-15 F)in the Blue Ridge Parkway in North Carolina above Sparta/N. Wilkesboro. I was happy to spot Canopus way down on the Southern horizon. The photo is with my Canon 20D, 1 min unguided, ISO 1600, Tak FS-102 at f/6.

The two faint pair of stars on the horizon are about -53 degrees S. That's quite a view into the Southern skies!

(38 N)

December 17, 2004 03:19 AM Forum: Solar System Observing

DSLR of Comet Machholz

Posted By Ivan Ong

Dec 16, 0100 hrs, EST. A naked eye object! I used a Canon 20D at ISO 1600, 4 min exposure, Tak 4" at f/6.
Does anyone know if it is going to get any brighter?

December 18, 2004 01:32 AM Forum: CCD Imaging and Processing/Solar System

Advice needed on Saturn processing

Posted By Ivan Ong

Hi, I am using a C9.25, 3x barlow, Philips ToUCam II and Registax.
When I adjust sharpness on my image on Registax to bring out details, especially in the rings, this artifact appears on the disk: it runs the circumference of the disk but on the inside. As you can see in the picture, it looks like clear plastic piping ringing the inside of the planetary disk.

How can I minimize this while processing to bring out fine details?

Thanks for your help,

December 30, 2004 02:11 AM Forum: Equipment Talk

Televue EP Question

Posted By Ivan Ong

Hi, I have an older Televue 24mm WF, purchased quite a few years ago. It has very nice views, and I use it quite a bit. I was wondering if anyone had some info on this EP. Is it a plossel? Is it a pre-cursor to the Nagler or Radian? Is it a 60 degree?

Is it worth changing to a 24mm Panoptic- or should I stay with this. I read so much about the "space walk" "porthole" experience that I am curious.

Thanks for your opinions,


January 2, 2005 04:55 AM Forum: Equipment Talk

Televue 16mm T5 question

Posted By Ivan Ong

Hi, I wear glasses to correct astigmatism. I see the specs on the Nagler 16mm T5 as having 10mm Eye Relief. Seems a tad short. Can anyone wearing glasses share some feedback? Is it worth getting this for the image quality when I cannot enjoy the wide field view? Are there other alternative recommendations in the 15-18mm range?
Many thanks for your help,

January 4, 2005 03:58 PM Forum: Deep Sky Observing

Splitting Sirius?

Posted By Ivan Ong

Hi, I am using a C9.25" to observe double stars, and having a great time. I had nice views of Antares and its little green companion over the summer. It turned out once I knew where to look for it, it was even easy to glimpse this even in non-optimal skies. I could even see it with my 4" Tak without too much effort.

So question is, has anyone split Sirius? If so, what techniques do you use? I know this probably calls for the steadiest of skies, but is this a foolhardy attempt?


January 11, 2005 03:28 AM Forum: Equipment Talk

Help needed: Tak 60 or TV 60?

Posted By Ivan Ong

Hi, I am interested in buying a small 60mm APO for the following reasons:
(a) for travel and (b) for astrophotography with my Canon 20D. I have settled on either the Tak 60 or the new Televue 60mm.

From some reviews, people have mentioned it was a pain swapping accessories in the Tak 60 to get various EP's to focus. I am planning to use Naglers and Radians. Does anyone know what this will entail?

Does the Tak 60 come with a Camera Angle Adjuster? I do not think the Televue 60 does, nor do I think the TV comes with a focal reducer. For those reasons I am more on the Tak side.

Do you prefer one over the other?

Many thanks for your opinion,

January 21, 2005 03:37 AM Forum: Takahashi

"Keitel Adapter" for FS-60C

Posted By Ivan Ong

Hi, does anyone know what it is? It is listed as a new product at ATWB.

January 21, 2005 05:32 PM Forum: CCD Imaging and Processing/Solar System

Hutech IDAS LPS filter for DSLR?

Posted By Ivan Ong

I am thinking of purchasing a Hutech IDAS LPS filter, to increase contrast when using my Canon 20D for astrophotography through my refractors. I am at a relatively dark site with moderate light pollution from a nearby town.

Can anyone let me know if
-you have used this and can recommend this filter
-if there will be color shifts or any imaging issues
-will particular emission nebulas be emphasized over stars

Thanks very much for your help,

January 21, 2005 07:25 PM Forum: Pet Pics


Posted By Ivan Ong

This is my pal Henry, faithful astrobuddy. He prefers refractors over CATs. He loves star parties and knows not to pee on the Tak wooden tripods.