Nikon D3 shoots Orion Nebula &....

Started Dec 16, 2007 | Discussions
OP Todd Hargis Senior Member • Posts: 2,293
Kerel,

A snow storm... woe, that is some cold weather. Well cool, congrats to you for getting the D3...A sweet camera isn't it? I hope to see some of your landscape and astrophotos soon. Take care,

-T

karel wrote:

Those are fantastic shots Todd. I did get my D3 and can't wait to get
out there in the near future and try some astrophotography. Currently
we are in the middle of a snow storm up here in Canada so the
conditions are definitely not ideal for viewing.
--
Karel

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OP Todd Hargis Senior Member • Posts: 2,293
Re: Todd that is excellent..........

Thanks, well first I would check to see if there is a local astronomy club in your area, if so that would be a great place to start. I bet some members are shooting astro images. Also try going to star party's because there are usually all kinds of telescopes for you to compare. Last would be a astronomy forum: This is a good one. http://forum.ourdarkskies.com/index.php?act=idx there are lots of people like myself that are willing to help. But the Astronomy club is your best bet for info and local hands on.

-T

antonoat wrote:

Well impressed with your findings and images.
Where would you suggest is a good place to start for someone
interested in getting into this subject ?
regards
http://www.pbase.com/wildoat

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Georgi Veteran Member • Posts: 7,638
Re: Very cool / Larger image posted

So, let me see if I understand this.

If I went out and knew where to look and it was dark enough and i had a 1000mm I could see this?

This is soo cool

Georgi Veteran Member • Posts: 7,638
So Todd

Do you have like a worm drive to keep it moving WITH the object for longer exposures?

OP Todd Hargis Senior Member • Posts: 2,293
Re: Very cool / Larger image posted

Yep! M42 is visible very well in binoculars and so is the comet. The telescope does have a worm gear for tracking the sky. It moves at one RPM / minute.

http://www.skyandtelescope.com/observing/ataglance
http://www.earthsky.org/skywatching/orions-fuzzy-patch-is-the-great-nebula

-T

Georgi wrote:

So, let me see if I understand this.

If I went out and knew where to look and it was dark enough and i had
a 1000mm I could see this?

This is soo cool

-- hide signature --
Randy Simms Regular Member • Posts: 188
Re: CG-5 Mount

I typically spend an hour or two on a drift align and will do so next new moon.

I got to the site after dark on saturday so I just used the polar alignment scope on the mount. I aligned it with the D3 and 300 2.8 mounted and it tracked just fine, it wasn't until I switchd to the large OTA that I started having problems so I think it may have been a weight issue.
--
'I'm not smart I try to observe
millions saw the apple fall but
Newton was the one who asked why.'

sandy b
sandy b Veteran Member • Posts: 9,334
Magazines too

Sky & Telescope and Astronomy are widely availabe at news stands and contain a wealth of info and a good way of checking out the new equipment.

 sandy b's gear list:sandy b's gear list
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nickram Regular Member • Posts: 194
Re: Nikon D3 shoots Orion Nebula &....

Todd Hargis wrote:

The first image is Comet Holmes, a 3.5 minute exposure @ ISO 800.

Next is the Orion Nebula, which turned out so awesome.... ISO 1600
for 70 seconds! Wow, 70 seconds!Very little noise at all.

Todd, these are great, thanks. I know little about this kind of work technically, but why not shoot at optimal ISO 200 and 14 bit depth, wouldn't that give you the richest truest color, highest saturation, highest resolution and biggest blow up potential, not too mention highest stock sales? Is there a technical reason not to do this, like, the exposures are too long? Thanks.

OP Todd Hargis Senior Member • Posts: 2,293
Re:nickram

nickram wrote:

Todd Hargis wrote:

The first image is Comet Holmes, a 3.5 minute exposure @ ISO 800.

Next is the Orion Nebula, which turned out so awesome.... ISO 1600
for 70 seconds! Wow, 70 seconds!Very little noise at all.

well these were at 14 bit RAW and were processed and converted to jpg. The thing with ISO 200 is, it is slower (obviously) and the object are dim, some are very dim and require long exposures. I chose short high ISO exposures to minimize tracking errors that normally show up in long exposures. If I were to print one, I would convert it from 14bit raw to lossless tiff to get the best color etc. Doe that help explain?

-T

Todd, these are great, thanks. I know little about this kind of work
technically, but why not shoot at optimal ISO 200 and 14 bit depth,
wouldn't that give you the richest truest color, highest saturation,
highest resolution and biggest blow up potential, not too mention
highest stock sales? Is there a technical reason not to do this,
like, the exposures are too long? Thanks.

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dslrguy New Member • Posts: 14
Re: Nikon D3 shoots Orion Nebula &....

The pictures came out great. The Orion Nebula photo is awesome. Thanks for sharing.

Lord_Aragorn New Member • Posts: 24
Re: Nikon D3 shoots Orion Nebula &....

From a Canon user..

Awesome shots, well done and thanks for sharing.

gonzalu
gonzalu Forum Pro • Posts: 10,392
Todd, you must be happy... these are wonderful...

Can you share how you actually do the tracking? If you like, you can contact me off line.

I just have always wondered how to go past my 5 to 10 second exposures with the 50mm I wouldn;t dare go past that or risk trailing. I don;t yet own a scope but would like to know more before I plunge deep.

In NYC it is hard to get away from light pollution.. but eastern skies from Westchester are not that bad

It has always been a puzzle to e how to set it all up.

I buy Sky and Telescope and other astro mags all the time. What I would love to see is a video tutorial of some kind

Is there such a video out there?

Thanks and once again... WOW!!! I am jealous!
--
Manny
http://www.pbase.com/gonzalu/
http://www.mannyphoto.com/
FCAS Member - http://manny.org/FCAS

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gonzalu
gonzalu Forum Pro • Posts: 10,392
In my search for video tutorials, I found this..
 gonzalu's gear list:gonzalu's gear list
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Joao Sobral Regular Member • Posts: 356
Re: Nikon D3 shoots Orion Nebula &....

More then amazing.

your shots looks like it was taken by nasa

Joao Sobral

lovEU Veteran Member • Posts: 3,135
Re: Todd

Craig Robinson wrote:

If I'm not mistaken, I believe if you use live view you'll be able to
zoom in and obtain a very precise focus...

exactly, you can zoom onto the eyes of those aliens over there

ps. Todd, very cool images.
--
regards, eric

Jarle_Aasland Senior Member • Posts: 1,533
Comparison: Comet Holmes w/D2X

And here's one of mine, taken with a D2X at 500 ISO a few weeks ago. Needless to say, the D2X can't compete with the D3 at higher ISO settings. There are several other differences as well (focal length, comet's brightness, post-processing, etc, but still).

70-200mm f/2.8 wide open, 25 sec exposure:

And for comparison, Todd's photo. D3, 3.5 minute exposure @ ISO 800.

Great shots Todd. Thanks for sharing.

Jarle

David Chin Forum Pro • Posts: 11,670
Superb pics!!! (nt)

Todd Hargis wrote:

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Regards, David Chin
http://nikond3.dpnotes.com/

dannv Veteran Member • Posts: 3,416
question re star refraction?

not sure the correct term but the larger stars all have refractory 'arms' coming out from them -- why not the smaller stars? and why are the arms pointing only down from the stars near the top but pointing only up from the stars at the bottom?

i would have thought this was some sort of tracking issue but the different angles make me think its related to lens and/or mirror optics?

...dav
--
don't wait for technology -- it won't wait for you

miancu Senior Member • Posts: 1,530
Absolutely astounding.

I wanted to write in all caps but the dp bot told me not to shout...
Thanks for sharing.

miancu
--
-------------------------------
http://www.flickr.com/photos/nikonion
http://nikonion.smugmug.com

jccrtv Regular Member • Posts: 414
Re: Nikon D3 shoots Orion Nebula &....

Todd, I'm hoping you're not getting tired of questions. It's just that many of us are blown away with the astro photos. I've done unguided a-focal astro qucik-shots and stacked them. But I've never understood how the "hand guided" procedure works for long exposures, can you please help with that? It looks like you're supposed to keep adjusting the alignment slowly by hand so the object stays centered in the crosshairs of the guide scope. What I misunderstand about this is, doesn't that introduce shaking or movement? Or do little wrong moves (from human hand adjustments) not matter because of the long exposure? Is it that the long enxposure will show mostly the centered object because it has been (mostly) where it should be in the crosshairs, and ignores the short little hand alignment errors? thanks in advance.

I have a CGE-1000 and would like to try removing the tube and going after wide field tracking using the CGE's aligned mount.

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