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What's the verdict with ICX-694 cameras?

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#51 JJK

JJK

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Posted 22 May 2014 - 07:35 AM

Maybe I'm just a bit new to imaging, but I was surprised how little noise and how much dim gas structure came out. I figured it'd take dozens of subframes to see anything pretty. It was the first shot I took with my ICX-694, and I was impressed at what I could do and the dim structures I could see with so little processing.

I've done some more since then, but I've been struggling with guiding issues, and seeing/weather/light pollution so haven't put much else together. I can dig through my archives and see if I can find anything else.

But again, maybe my excitement is just my own lack of experience. And yes, not the best target, but for me, I'd shot it before with other telescopes and other cameras. I wanted to see what this could show me that I hadn't been able to capture before. This is what I was used to getting with my SLR and newtonian:

http://i.imgur.com/x3mDn.jpg

And pardon the colors, I was having fun with it. So to me, it was a whole new world of imaging. Maybe it's not the fact that it was a 694, so much as just having proper CCD. I'm not sure. I could probably go back and do something similar with an SLR at this point, if Orion were still up.


Hi Robert,

Nice tests of the camera will be the Flame/NGC2023/Horsehead region (lovely area with a wide range of color, and parts of the HH has faint nebulosity), the Jellyfish nebula (fainter red nebula). Pavel just posted some nice images of vdb objects that look interesting.

Best,
John

#52 JJK

JJK

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Posted 22 May 2014 - 08:24 AM

Blueman: please, what browser and OS do you use? I guess some new Internet Explorer under some Windows? I know my gallery isn't perfect as I do not fully support MSIE due to various reasons (all "products" from Microsoft have different set of bugs and are inconsistent between versions of the same software and for me it's a nightmare to cover all exceptions because MS doesn't care about any standard). Every other browser should work well as every other cares about internet standards... maybe you have just by default disabled popup windows.

anyway, many of my images still do have some kind of problems that is visible in 1:1 (100%) scale. Sometimes it's collimation (I am new to newtonians) or focus or kinda tracking - I have to setup every day from scratch, I am mobile photographer, no observatory, no fixed place, I put all gear to my car and go to dark place...

here are some direct links to images and full scale:
http://www.astro.cz/...rsehead.jpg....
http://www.astro.cz/...0minHaD-W6fi...
http://www.astro.cz/...OR.jpg.html?...
http://astrofotky.cz.../1379338239.jpg
http://www.astro.cz/...g.html?g2_im...
http://www.astro.cz/...gether-W9fin...

and here are some in 50% only:
http://astrofotky.cz.../1396881171.jpg
http://astrofotky.cz.../1393598615.jpg
http://astrofotky.cz.../1381166843.jpg

and one of my best, 5.5hours total (2h Lum + rest for color) in full scale:
http://www.astro.cz/...g.html?g2_im...

this image above demonstrates the 10x improvement in LRGB imaging when using big aperture, fast focal ratio and 36x24mm chip though totally lousy chip.

here I used small 77mm aperture Borg, but with superb clean high QE SONY chip, but as you can see, the chip surface is 8x lower and low readout noise is of no importance for LRGB (if you shoot LRGB 2min subs or 4min subs is not a big deal to mitigate RN) AND the aperture 250mm vs 77mm has another total impact on final SNR so after 5.5 hours with tiny refractor and small surface chip I got only this noisy image:
http://astrofotky.cz.../1351541816.jpg


The vdB image with the larger scope looks very nice, but the diffraction spikes detract from its beauty. Nothing's perfect.

#53 Robert York

Robert York

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Posted 22 May 2014 - 12:53 PM

Hi Robert,

Nice tests of the camera will be the Flame/NGC2023/Horsehead region (lovely area with a wide range of color, and parts of the HH has faint nebulosity), the Jellyfish nebula (fainter red nebula). Pavel just posted some nice images of vdb objects that look interesting.

Best,
John


It's been very windy and hazy here, and with the limits I have from my back yard due to some neighbor's trees, I have a limited selection of what I can get easily. Most of the nice nebula are below the horizon. I'm trying to get a nice shot of M101, but weather's not cooperating. I'll see what I can get a picture of and post it up.

#54 blueman

blueman

    Photon Catcher

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Posted 22 May 2014 - 01:11 PM

Blueman: please, what browser and OS do you use? I guess some new Internet Explorer under some Windows? I know my gallery isn't perfect as I do not fully support MSIE due to various reasons (all "products" from Microsoft have different set of bugs and are inconsistent between versions of the same software and for me it's a nightmare to cover all exceptions because MS doesn't care about any standard). Every other browser should work well as every other cares about internet standards... maybe you have just by default disabled popup windows.

anyway, many of my images still do have some kind of problems that is visible in 1:1 (100%) scale. Sometimes it's collimation (I am new to newtonians) or focus or kinda tracking - I have to setup every day from scratch, I am mobile photographer, no observatory, no fixed place, I put all gear to my car and go to dark place...

here are some direct links to images and full scale:
http://www.astro.cz/...rsehead.jpg....
http://www.astro.cz/...0minHaD-W6fi...
http://www.astro.cz/...OR.jpg.html?...
http://astrofotky.cz.../1379338239.jpg
http://www.astro.cz/...g.html?g2_im...
http://www.astro.cz/...gether-W9fin...

and here are some in 50% only:
http://astrofotky.cz.../1396881171.jpg
http://astrofotky.cz.../1393598615.jpg
http://astrofotky.cz.../1381166843.jpg

and one of my best, 5.5hours total (2h Lum + rest for color) in full scale:
http://www.astro.cz/...g.html?g2_im...

this image above demonstrates the 10x improvement in LRGB imaging when using big aperture, fast focal ratio and 36x24mm chip though totally lousy chip.

here I used small 77mm aperture Borg, but with superb clean high QE SONY chip, but as you can see, the chip surface is 8x lower and low readout noise is of no importance for LRGB (if you shoot LRGB 2min subs or 4min subs is not a big deal to mitigate RN) AND the aperture 250mm vs 77mm has another total impact on final SNR so after 5.5 hours with tiny refractor and small surface chip I got only this noisy image:
http://astrofotky.cz.../1351541816.jpg


Hi, I fully understand about having to setup each session. I too setup each new Moon at my site, though I do have a pier in the ground. But still nothing stays on site. It is a bit of a job to make sure everything is right each time.

Yes, Internet Explorer of course, but it only displays whatever is on the web site. If the resolution or size of a photo is small, then that is what you see. I also understand size constraints for a web site. My own gallery only allows images of 1.2 mb each. But I have unlimited numbers so I put up with it. ;)

These photos show for the most part that guiding and tracking are OK. The one looked like guiding was a bit ragged, but not so much on these new posts. Must have not been a good night. Seeing can affect this too.

I do not do Narrow Band much anymore, just not that interested in it. Not saying it is not nice but I prefer the more natural color of LRGB. :) But I take 8min or 10min subs now and as many as I can take with the given schedule.

My gallery is here. Most of the newer photos were taken with the ML8300 and the TEC140 @ f/5.4.
http://www.astrophot...oyd-s-pics.html
Blueman


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