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Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing

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vmsguy
sage


Reged: 01/09/07

Loc: West Virginia
180mm Nikkor with 52mm step down ring.
      #5541075 - 11/26/12 09:23 PM Attachment (88 downloads)

It's been a while since I have posted out here. Haven't been able to image much lately, but last week I took my modified T1i and my trusty 180mm Nikkor ED to North Carolina.

I was on the coast, and the moon was up, but the sky was clear.

I used a 72mm-52mm step down ring to stop down the 180mm to ~f/3.5.

The resulting image is 83 subs @ 120seconds each and ISO800. No darks, flats, or bias frames used in the processing. DSS to stack, and CS6 curves and levels.

Click HERE for cropped FULL res image.

Brent

Edited by vmsguy (11/26/12 09:24 PM)


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Nils_Lars
Postmaster
*****

Reged: 01/04/08

Loc: Santa Cruz Mountains , CA
Re: 180mm Nikkor with 52mm step down ring. new [Re: vmsguy]
      #5541182 - 11/26/12 10:23 PM

Lots of details for 180s subs , that step down ring looks like it worked perfect.

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fco_star
Pooh-Bah
*****

Reged: 12/13/10

Loc: Texas, Midland
Re: 180mm Nikkor with 52mm step down ring. new [Re: Nils_Lars]
      #5541214 - 11/26/12 10:40 PM

Beautiful image, I hope to get something like this with my Nikkor.... good job

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zjc26138
Loved By All
*****

Reged: 02/24/05

Loc: Mingo Junction, Ohio
Re: 180mm Nikkor with 52mm step down ring. new [Re: fco_star]
      #5541258 - 11/26/12 11:06 PM

Fantastic image!

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Phil Wheeler
Carpal Tunnel


Reged: 12/31/05

Loc: 3 miles WNW of Celestron
Re: 180mm Nikkor with 52mm step down ring. new [Re: vmsguy]
      #5541277 - 11/26/12 11:13 PM

Nice, Brent. What mount did you use? Guided or not?

I hope to do similar things with my Canon 200L f/2.8 lens on a Vixen Polarie -- but I've yet to try it. Your results are encouraging.


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mmalik
Post Laureate
*****

Reged: 01/13/12

Loc: USA
Re: 180mm Nikkor with 52mm step down ring. new [Re: vmsguy]
      #5541291 - 11/26/12 11:21 PM

This is a beauty.

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vmsguy
sage


Reged: 01/09/07

Loc: West Virginia
Re: 180mm Nikkor with 52mm step down ring. new [Re: Nils_Lars]
      #5541299 - 11/26/12 11:24 PM

Erik,

I took 120 second subs. Couldn't go much longer because of the moon.

Brent


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vmsguy
sage


Reged: 01/09/07

Loc: West Virginia
Re: 180mm Nikkor with 52mm step down ring. new [Re: Phil Wheeler]
      #5541307 - 11/26/12 11:26 PM

Hi Phil,

I use an unguided Orion Sirius mount. Camera and lens only, no piggyback.

Brent


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Phil Wheeler
Carpal Tunnel


Reged: 12/31/05

Loc: 3 miles WNW of Celestron
Re: 180mm Nikkor with 52mm step down ring. new [Re: vmsguy]
      #5541312 - 11/26/12 11:27 PM

Thanks, Brent -- I sensed you were traveling a bit light from your message. A very nice result!

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LeCarl
super member


Reged: 03/16/11

Re: 180mm Nikkor with 52mm step down ring. new [Re: Phil Wheeler]
      #5546308 - 11/29/12 09:40 PM

Wow! Sooo clean, beautiful horsehead!

A very good lens! can you post a not cropped version? (I want to see the corners if possible)

I really like simple setup! step down is a good idea too! (instead of using the diaphragm that make stars look fuzzy!)

My 200mm F3.5 At F6.8 look a way worst than this! (and soo dark!)


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vmsguy
sage


Reged: 01/09/07

Loc: West Virginia
Re: 180mm Nikkor with 52mm step down ring. new [Re: LeCarl]
      #5546495 - 11/30/12 12:12 AM

Yes,

I'll post a full res image tomorrow when I get to work. It is on my laptop there. The full res image has a good bit of vignetting because I didn't take flats and was pretty aggressive in stretching to get to the data with 2 minute exposures at iso800.

Brent


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vmsguy
sage


Reged: 01/09/07

Loc: West Virginia
Re: 180mm Nikkor with 52mm step down ring. new [Re: vmsguy]
      #5547285 - 11/30/12 01:59 PM

Here are links to 3 images, all unprocessed.

DSS output as 16bit Tiff
DSS output as jpg
Single 120 second frame.

Stacked tiff: (88 MBytes)
http://webpages.marshall.edu/~maynard169/master1-83f.TIF

Stacked jpg:
http://webpages.marshall.edu/~maynard169/master1-83f.jpg

Single frame:
http://webpages.marshall.edu/~maynard169/hh-wilm-120s-800iso-063.jpg

Brent


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dp297
sage


Reged: 12/14/10

Re: 180mm Nikkor with 52mm step down ring. new [Re: vmsguy]
      #5548298 - 12/01/12 05:07 AM

Beautiful...thanks for sharing Brent

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LeCarl
super member


Reged: 03/16/11

Re: 180mm Nikkor with 52mm step down ring. new [Re: dp297]
      #5548742 - 12/01/12 12:46 PM

WOW! Yeah, thanks for sharing, this image was sooo good!!!
Now, I need this lens!!!
(sickness about buying new/old things!)

The corners are very good, maybe closed to F4, it can give perfect wide field!

Flat is a must and easy to do at this focal, imagine what this lens can do in a dark site, guided, dithered, with Ha!

Starting today to try sell my 2011 nikkon 70-300 VR EDII (not good at F5.9... fixed focal is better)

Your lens exact specs? pictures?

(I want to thanks you again, very good images, very informative too! )


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vmsguy
sage


Reged: 01/09/07

Loc: West Virginia
Re: 180mm Nikkor with 52mm step down ring. new [Re: LeCarl]
      #5549711 - 12/02/12 01:13 AM


The lens I used is the f/2.8 180mm ED Nikkor, manual focus.

Here is a Ken Rockwell review.
http://www.kenrockwell.com/nikon/180f28.htm

Here is another review from Jerry.
http://www.astropix.com/HTML/I_ASTROP/EQ_TESTS/NIKON_180MM.HTM

This is a great lens, that has gained a strong following from us astro imagers.

I picked mine up on eBay several years ago, and you can still find them there occasionally.

I need to create a web page of my images using the 180mm. Some of them were taken at very dark sites.

Brent


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spectre
sage
*****

Reged: 05/09/10

Loc: Abington, PA
Re: 180mm Nikkor with 52mm step down ring. new [Re: vmsguy]
      #5550310 - 12/02/12 12:58 PM

Francisco, I have virtually the same equipment you do. I'll be very interested to see your results with the Nikkor 180mm. I'm in the market for a lens for widefield and I'm leaning that way

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fco_star
Pooh-Bah
*****

Reged: 12/13/10

Loc: Texas, Midland
Re: 180mm Nikkor with 52mm step down ring. new [Re: spectre]
      #5553552 - 12/04/12 08:43 AM

Spectre, I can tell you that I love my Nikkor 180, stop at 4 you get perfect stars, my best so far is M31 1 hour of integration time, I'm wondering what this lense could do in a dark site

M31 Nikkor 180mm

Edited by fco_star (12/04/12 08:45 AM)


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nofxrx
Vendor (HyperCams & Mods)
*****

Reged: 07/12/05

Loc: Palm Bay,Florida
Re: 180mm Nikkor with 52mm step down ring. new [Re: fco_star]
      #5554604 - 12/04/12 08:33 PM

Hey Brent! Brent here, telling you this is a wonderful image! lol
Almost like referring to oneself in the third person, but also not...very confusing..

How much was this cropped? just curious what the FOV is like for this area as I am going to be testing mine out in the same area later this winter..
I just picked one (Nikkor 180ED) up to go with my Nikon D800 (OH THE HORROR!!Not Nikon?!?!? LOL) for only $250!


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vmsguy
sage


Reged: 01/09/07

Loc: West Virginia
Re: 180mm Nikkor with 52mm step down ring. new [Re: nofxrx]
      #5554963 - 12/05/12 01:14 AM

Hi Brent,

A few posts up I have links to some full frame images.

They are all unprocessed, a 16 bit tiff, a jpg, and a single sub.

Brent


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SunBlack
professor emeritus


Reged: 05/05/11

Loc: Rome (IT)
Re: 180mm Nikkor with 52mm step down ring. new [Re: vmsguy]
      #5555389 - 12/05/12 10:04 AM

Nice image, vmsguy. I dont notice vignetting introduced by the stepping down ring on the unprocessed frame. I wonder how the ring will work on a FF camera.....

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