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Equipment Discussions >> Video and Electronically Assisted Astronomy

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Teabagger
member


Reged: 08/18/12

Re: Ntech 300(small version) x1024 ex view camera new [Re: alexaggie]
      #5405233 - 09/05/12 04:39 PM


how did you process the image of m42?


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GlennLeDrew
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Reged: 06/18/08

Loc: Ottawa, Ontario, Canada
Re: Ntech 300(small version) x1024 ex view camera new [Re: Teabagger]
      #5405324 - 09/05/12 05:42 PM

I too was wondering about how it was 'processed', for processing is normally performed on images of dim targets having low contrast. The inner Huygenian region of M42 is just about as bright as nebulosity can get. For this reason it's a poor test target for the assessment of sensitivity and noise levels.

To me, this image simply appears like a single frame taken at a long focal ratio and/or short exposure time. The fact that this pretty near brightest of all nebulosities appears this 'dark' is by itself no great confidence builder on performance with less brilliant objects.


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alexaggie
journeyman


Reged: 01/10/12

Re: Ntech 300(small version) x1024 ex view camera new [Re: GlennLeDrew]
      #5406909 - 09/06/12 05:10 PM

yes, its a single frame with a short exposure....I just meant that I ran it through photoshop. It was also taken from the border of a white zone in my backyard.

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GlennLeDrew
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Re: Ntech 300(small version) x1024 ex view camera new [Re: alexaggie]
      #5407005 - 09/06/12 06:15 PM

And it reveals just how very bright the inner part of M42 is, whereby a nice and colorful view can be had, with still a 'black' sky, under horrid light pollution. This is why such bright targets do not make good tests for imaging equipment where sensitivity and noise characteristics are desired to know; even un-cooled, low-sensitivity, noisy cameras on warm nights can deliver good looking results. If only a *lot* more nebulae (many planetaries do, but they're almost universally tiny) had such high surface brightness!

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alexaggie
journeyman


Reged: 01/10/12

Re: Ntech 300(small version) x1024 ex view camera new [Re: GlennLeDrew]
      #5407309 - 09/06/12 09:27 PM

Indeed. That is my first photo EVER...taken when working out the kinks with the camera. It is through an 8" dob, so until I get my EQ platform running and can get out to a dark site I have to stick with very short exposures. I did crank it up to 512 and 1024, but as I have no tracking it was a smear across the frame. The noise, however, was not much more than in the picture I uploaded. The brightness of that nebula was blowing out the image at those speeds. The shutter setting for the picture was x8. As I am new, it seemed to me that for an exposure time that short, under those conditions, the camera will be sensitive enough for some pretty good imaging under more ideal conditions. The next time I get out to my dark site I am going to try M101 as that one is absolutely impossible to see from my house.. That should probably be a better measure of potential.

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James Cunningham
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Reged: 08/07/10

Loc: Maryland
Re: Ntech 300(small version) x1024 ex view camera new [Re: alexaggie]
      #5407413 - 09/06/12 10:32 PM

Where is the image?

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scout72
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Reged: 05/12/08

Loc: SF Bay Area
Re: Ntech 300(small version) x1024 ex view camera new [Re: James Cunningham]
      #5407598 - 09/07/12 12:36 AM

Quote:

Where is the image?




About 9 posts back-


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rkayakr
sage
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Reged: 10/27/10

Loc: Northeast Ohio
Re: Ntech 300(small version) x1024 ex view camera new [Re: scout72]
      #5407868 - 09/07/12 08:37 AM

What are people using for capture? I tried the EasyCAP / WXastro combo that I use with my Samsung and could not acquire an image from the Ntech.

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James Cunningham
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Reged: 08/07/10

Loc: Maryland
Re: Ntech 300(small version) x1024 ex view camera new [Re: mega256]
      #5410605 - 09/08/12 07:11 PM

Did you ever figure out why the camera was only showing black and white at first?
Jim


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Teabagger
member


Reged: 08/18/12

Re: Ntech 300(small version) x1024 ex view camera new [Re: rkayakr]
      #5410658 - 09/08/12 07:45 PM

Quote:

What are people using for capture? I tried the EasyCAP / WXastro combo that I use with my Samsung and could not acquire an image from the Ntech.




Im using some cheap kworld ub445 capture device(that was a real pain to get to work with win 7), and it works fine now with sharpcap. wxastro, ampcap, Videolan. It has been pouring rain since my camera arrived so I have only had a chance to set it up in house.... Really looking forward to getting it under the skies.


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Teabagger
member


Reged: 08/18/12

Re: Ntech 300(small version) x1024 ex view camera new [Re: Teabagger]
      #5411051 - 09/09/12 01:00 AM Attachment (100 downloads)

Got out with the camera tonight in very light polluted skies. mainly playing with the set up, brand new to me cg5 and first time out with ccd... with no filters whatsoever, i generally washed out the screen over 32X sense up. I just decided to take frames when my comp died and that ended my night with it. heres a snapshot I took.

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mega256
scholastic sledgehammer
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Reged: 05/10/07

Loc: N of Tampa
Re: Ntech 300(small version) x1024 ex view camera new [Re: James Cunningham]
      #5411162 - 09/09/12 04:46 AM

Yes Jim the agc vrs the brightness made a diference keep agc low and brightness under 20 and color with daylight will work

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James Cunningham
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Reged: 08/07/10

Loc: Maryland
Re: Ntech 300(small version) x1024 ex view camera new [Re: mega256]
      #5411241 - 09/09/12 07:36 AM

Thanks. I had my brightness all the way up to 85.
Jim


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barbarosa
scholastic sledgehammer


Reged: 04/11/10

Loc: "lamorinda", CA
Re: Ntech 300(small version) x1024 ex view camera new [Re: mega256]
      #5419166 - 09/13/12 01:09 PM Attachment (85 downloads)

Here are a series of images that mark waypoints on my learning curve for the LN-300. One lesson learned is that at least some settings you change in the menu will revert to the prior settings after a time unless you exist and save after each change. I did not take notes but as I get closer I will record the settings.

The images are SharpCap "snapshots" and were not post processed. CPC1100 scope and a .5x reducer on the cam.

First image.

Edited by barbarosa (09/13/12 01:15 PM)


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barbarosa
scholastic sledgehammer


Reged: 04/11/10

Loc: "lamorinda", CA
Re: Ntech 300(small version) x1024 ex view camera new [Re: barbarosa]
      #5419172 - 09/13/12 01:12 PM Attachment (74 downloads)

Second image.

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barbarosa
scholastic sledgehammer


Reged: 04/11/10

Loc: "lamorinda", CA
Re: Ntech 300(small version) x1024 ex view camera new [Re: barbarosa]
      #5419174 - 09/13/12 01:13 PM Attachment (62 downloads)

Last image. This is not the best image seen, but I changed something in the menu (small buttons compared to finger size) and lost the initial settings.

Edited by barbarosa (09/13/12 01:17 PM)


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Teabagger
member


Reged: 08/18/12

Re: Ntech 300(small version) x1024 ex view camera new [Re: barbarosa]
      #5419436 - 09/13/12 03:39 PM

I had similar results as you lastnight once it hit the meridian and it stopped tracking m27 so I switched to m57, that was much more pleasing to the eye.

Edited by Teabagger (09/13/12 03:46 PM)


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Teabagger
member


Reged: 08/18/12

Re: Ntech 300(small version) x1024 ex view camera new [Re: Teabagger]
      #5419439 - 09/13/12 03:42 PM Attachment (86 downloads)

Here is the shot of m57 from last night... so due to my success/lack of with the ntech i went and bought a mallincam xtreme today so tonight will probably be cloudly.

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GlennLeDrew
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Reged: 06/18/08

Loc: Ottawa, Ontario, Canada
Re: Ntech 300(small version) x1024 ex view camera new [Re: Teabagger]
      #5419525 - 09/13/12 04:41 PM

So far, the results from this camera suggests that, in warmer weather at least, they're somewhat useful on the brightest DSOs. In order to have a chance on objects of lower surface brightness, it will require temperatures more in the freezing domain.

Another approach is to see about getting the f/ratio down to f/2, if not faster. But this is easier said than done at larger apertures outside of something like the Hyperstar system.


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James Cunningham
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Reged: 08/07/10

Loc: Maryland
Re: Ntech 300(small version) x1024 ex view camera [Re: Teabagger]
      #5419588 - 09/13/12 05:20 PM

You will be happy with the Xtreme. I gave up on my Lyntech and sold it. The Extreme is so much nicer.
Jim


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