12 replies to this topic

[Dale Eason]

I'm stunned by this picture I just took with my NV of Cygnus using my Mod3c with 50mm Nikon 1.18 lens on a tripod  8 second ISO 400 Samsung Note 5.   This is very close to what you see in the eyepiece.  No post processing other than cropping to the circle.

 

This is using a Antila HA 3.5 narrow band filter.  It really helps darken the background.  How many things can you find?   Too many for me to count.  I really am blown away at this capability.  The live view is just too much to describe as you pan around cygnus. 

 

Second image is North of North America which is in the upper right edge.  Large blob at 10 o'clock is Elephant trunk area.  When you scan the sky you can pick up a few more things that movement helps you discover as well as the center of the filtered area is a tiny bit more bright than the outer area that lets you pick up dimmer objects as you scan over them.

 

For the camera it takes a few seconds for the exposure what you eye can see immediately.

 

Dale

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[Starman27]

Impressive.

[Wildetelescope]

If you were to move the N Am. Neb. Into the center, would you have the same contrast? With my 12 nm HA I do not. Things stand out on the edges and disappear in the center. Curious ast to why?. Images look great!

Jmd

[Starman81]

Wow! 

 

At first glance I thought maybe this was from a dark site, hence the stars shining through the filtration better perhaps but now I'm thinking camera's integration time... But can it really be that close to what you see in the eyepiece with such a narrow filter in the face or Bortle 8.5 light pollution? Genuinely asking here, because when I use my 7nm h-alpha in similar suburban skies, the stars are greatly attenuated.

[Dale Eason]

Wow! 

 

At first glance I thought maybe this was from a dark site, hence the stars shining through the filtration better perhaps but now I'm thinking camera's integration time... But can it really be that close to what you see in the eyepiece with such a narrow filter in the face or Bortle 8.5 light pollution? Genuinely asking here, because when I use my 7nm h-alpha in similar suburban skies, the stars are greatly attenuated.

I think so.  When switching to a 685 long pass I get 10x or many times that stars.  Last year my sky measured at best 18.7 most of the time.  Sometimes last year it made it to 18.8.  I can hardly see all of the big dipper these days.  Usually only Polaris with a struggle and one other of the little dipper occasionally.  There are no stars between Arcturus and Vega above 45 deg horizon.  Part of the problem is the direct light from my neighbor directly across the street. Three lights on the front of his house.  I can read a news paper when I have dark adapted.  He lets me cover his lights so then after awhile I can see one more star in the little dipper.

 

It is very close to what I see in the eyepiece but perhaps brighter by 1/2 a stop.

Edited by Dale Eason, 25 June 2020 - 01:51 AM.

[Wildetelescope]

Wow! 

 

At first glance I thought maybe this was from a dark site, hence the stars shining through the filtration better perhaps but now I'm thinking camera's integration time... But can it really be that close to what you see in the eyepiece with such a narrow filter in the face or Bortle 8.5 light pollution? Genuinely asking here, because when I use my 7nm h-alpha in similar suburban skies, the stars are greatly attenuated.

Yes.  I think the difference is image scale.   With a picture it sort of "blows things up", because you are projecting onto a sensor, and then displaying on a computer screen(the computer screen in this case is probably more to the point).  You also get to use 2 eyes to look at stuff.  From what I can tell, the main difference from the cell phone is that it averages things so you do not see the scintillation.  I find that what I see in the eyepiece is pretty close to the image my phone takes, although the visual image seems brighter, compared to the picture.  Anyway that is my working hypothesis:-). 

 

JMD

[Dale Eason]

Here is an object I don't remember anyone posting before.  I think it looks like a skeletal hand or a claw.  The bright star at about 3o'clock is Omicron1 Cygni.

 

Once again this was taken from my light polluted drive way around 11 pm.  10 F3 newtonian.  Mod3C into TV 55 plossol and TV SIPS with a HA 2.5 2 inch filter.  Exposure was 4 seconds at ISO 400 with a Samsun Note 5 into the eyepiece.  Field of view is 3 deg , mag 16x.  I/8 moon was setting so not an issue at all.

 

I wonder if this is part of a super nova remnant. Something is making waves in it I think.  It is not far from the Propeller either.  This was visible in real time in the eyepiece otherwise I would never have seen it to stop and take an image.

 

Dale

 

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[Jeff Morgan]

That is a cool image Dale!

 

I have shot the area near the Propeller, it is full of many features I call "Mares Tails". Don't know if I have gotten any closer than star HR 7756, I will look thru my images for that feature.

[Peregrinatum]

Looks great, Dale!  thanks for sharing

[Mike Lockwood]

Those filaments are visible in two images that I downloaded for reference to show all of the stuff in the Cygnus region.  I found where one of them came from:

  http://www.robgendle...gnusmosaic.html

 

The filaments are at upper right along with o1 Cygni.  Just rotate your image counterclockwise and they match up nicely.  It is not designated on any chart that I have, it appears to just be part of the background in Cygnus.

 

Whenever I see a good image somewhere, I tend to download it and put it in my NV folder for future reference, which helps a lot for things like this.

 

I used my 3.5nm filter in front of the 3X lens attachment on my NV unit last night and had fun hopping from nebula to nebula right up the Milky Way from southern Scorpius to past northern Cygnus.  I'll look for this area the next time I have good skies.

[Jeff Morgan]

I was playing around with a DIY camera adapter and had some issues with squaring the phone to the eyepiece, so discarded many of those images - typically one quadrant edge showed defocus blur.

 

Checking my discards, I think this might be your region near Omicron. SQM 20.5 sky. Shot with a TMB 130SS, 55 plossl, ISO 3200, 1/3 second, 45 frame average, 7nm h-alpha.

 

A cool region deserving of more images ...

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[Dale Eason]

Yes Mike hat link was great.  That is it.  When you then click on the largest image available on the web page that feature is in the upper right corner.

 

In the smaller image on the page you get there from Gamma heading first to that bright fat rail road spike.  Then next bright clump  contains the propeller then the wave structure. Here are my images for my traverse that I found interesting.  All were taken with the 10F3 mod3c into TV 55 Antila HA 3.5 filter.  Still using the original TV 55mm Adapter with the smaller opening.  Single exposure Samsung Note 5 at 4 seconds and ISO 400. 

 

First is Gamma Cygni

 

Next is the fat rail road spike with Gamma on the far left.

 

Next go up the spike to star HR7802.The bright group of stars at 3 O'clock close to the center of image 3.  Wish I knew how to get text by the images.

 

Then the propeller 

 

Finally the original pic of the post.  The claw not posted in this post.

 

As the link Mike shared there is much to see in this region and all visible without the use of the camera even in my light polluted nearly white zone skies.  What fun this must be in better conditions.

 

 

 

 

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[Dale Eason]

This image of the upper half of Cygnus  to show where those recent images came from.

 

This is 2X with a Nikon 50 mm 1.18 lens and HA 3.5 filter.  Single 4 second exposure ISO 400 with a Samsung Note 5. cell phone.  NV held on a photo tripod with the camera adapter friction fit onto the NV eyepiece.

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Edited by Dale Eason, 27 June 2020 - 11:23 AM.