Jump to content


Photo

NexStar AP Graduates Images and Discussions

  • Please log in to reply
2693 replies to this topic

#2201 MushroomBill

MushroomBill

    Vostok 1

  • -----
  • Posts: 154
  • Joined: 26 Feb 2009
  • Loc: Oxfordshire. UK.

Posted 19 July 2013 - 01:48 PM

Thanks Tony, James and Peter. Much appreciated.

Hoping for another clear night and might try the Heart Nebula. Although I may just take the sleep option!! :sleepy:

#2202 ben2112

ben2112

    Cloud Magnet

  • *****
  • Posts: 1156
  • Joined: 12 Jul 2012
  • Loc: North Charleston SC

Posted 19 July 2013 - 04:45 PM

Mushroom Bill - :bow: :bow: :bow: Just awe inspiring.

#2203 haytor

haytor

    Apollo

  • -----
  • Posts: 1231
  • Joined: 29 Nov 2007
  • Loc: Smethwick near Birmingham UK.

Posted 20 July 2013 - 11:18 AM

That`s a very nice trio of images Andy, very well and nicely done :bow: :bow: :bow: :waytogo:

Really like the Ha mono image of the Lagoon(but then i would say that being a mono imager).

Will get round to answering your emails tomorrow, been busy these last few days.

Again, most impressed with your captures these past few months, onward and upward.

best regards,

Tom.

#2204 MushroomBill

MushroomBill

    Vostok 1

  • -----
  • Posts: 154
  • Joined: 26 Feb 2009
  • Loc: Oxfordshire. UK.

Posted 20 July 2013 - 05:50 PM

Thanks everybody :) I really appreciate your comments and encouragement :bow: :bow:. However I've reached the point now where I need a few days off to recover!!

To bow out for now then, I'll leave you with last night's attempt at a Heart Nebula mosaic.

I used EQMosaic for the first time to align the panels. Unfortunately I got my sums wrong somewhere!

This shot was made up from 9 panels. The main features were made up of 5 x 15m subs in Ha. Towards the end of the session it was getting light and I was running out of time so I cut the exposure length.

Captured in Nebulosity, stacked with DSS. A bit of Photoshop and then stitched together using MS Ice.

I shall come back to this another day to fill in the gaps and balance it out a bit more!

Goodnight all and thanks again!

:sleepy:



Andy

Attached Files



#2205 Maverick199

Maverick199

    Voyager 1

  • *****
  • Posts: 12538
  • Joined: 27 Feb 2011
  • Loc: India

Posted 21 July 2013 - 09:02 AM

Awesome and detailed. :D

#2206 hopskipson

hopskipson

    Apollo

  • *****
  • Posts: 1248
  • Joined: 24 Jun 2010
  • Loc: Queens, New Yawk, Light pollution Headquarters!

Posted 21 July 2013 - 09:29 AM

Andy, I think you have out done yourself again.

#2207 haytor

haytor

    Apollo

  • -----
  • Posts: 1231
  • Joined: 29 Nov 2007
  • Loc: Smethwick near Birmingham UK.

Posted 23 July 2013 - 06:23 AM

Great job Andy, a very nice attempt with the mosaic, WOW, what a FOV it produces, some really nice detail in there.Many congrats from me. :waytogo: :bow: :bow:

best regards,

Tom.

#2208 Tel

Tel

    Cosmos

  • *****
  • Posts: 9125
  • Joined: 31 Mar 2006
  • Loc: Wallingford England

Posted 02 August 2013 - 12:17 PM

Hi Folks,

I know ...... I've been putting it off because I'm still not sure what I'm doing in this field of astro-imaging, but finally I've made a further attempt at "bi-colouring* the image of the Crescent Nebula, (NGC 6888), I captured back in June.

The attached therefore makes use of the "Hubble Palette" technique where images, taken in both hydrogen alpha and oxygen lll, are used as "Red" and "Green" respectively while "Blue" is produced from a copy of the Olll image.

All colours therefore, like those used to show Hubble Palette images, are artificially produced but nevertheless, are arguably pleasing on the eye.

Image data:-

Original Ha and Olll images, (10 of each of 5 min. exposure time), taken with a "cheapo" Phenix 4" f/5.9 Achromat on a Skywatcher HEQ5Pro GEM guided by a Nexstar 8i OTA at f/6.3.

Capture camera: Atik 314L. Guide camera: Meade DSI Mk.1

Captured, stacked and processed in Nebulosity 2. Further processing in both Registax 6 and P/Shop CS2. Original B/W image used as a Luminence frame.

Guiding via PHD software.

Thank you for looking.

Best regards,
Tel

Attached Files



#2209 haytor

haytor

    Apollo

  • -----
  • Posts: 1231
  • Joined: 29 Nov 2007
  • Loc: Smethwick near Birmingham UK.

Posted 10 August 2013 - 07:57 AM

Nice work Tel. Can`t get my head around this hubble pallete stuff, better i stick with mono for now, LOL.

Blimey, this thread has gone quiet of late, mind you, i can talk, not been out much at all this summer myself to do any imaging, still, winters on its way, longer darker skies will help a great deal, weather and conditions permitting of course.

best,

Tom.

#2210 Tel

Tel

    Cosmos

  • *****
  • Posts: 9125
  • Joined: 31 Mar 2006
  • Loc: Wallingford England

Posted 10 August 2013 - 01:50 PM

Many thanks, Tom, for your kind comments. Much appreciated ! :bow:

I have to say that I'm still a novice where "Hubble Paletting" is concerned but I'm sure that before long, I should be able to produce colour nearer to that which is, (perhaps), recognised as more authentic: ..... whatever that means ! :idea:

(As you and I and many of friends and colleagues here on CN know, we've been down the "Colour Authenticity Road" many times before, and still reached little in the way of conclusion) ! :lol:

Best regards,
Tel

#2211 rockstarbill

rockstarbill

    Mariner 2

  • -----
  • Posts: 211
  • Joined: 16 Jul 2013
  • Loc: Snohomish, WA

Posted 13 August 2013 - 02:14 AM

Did manage to get M13 with my DSLR set up. I made attempts with the Hyperstar configuration but failed at getting the focus spot on - thus the images were useless. :( Once my Bahtinov Mask arrives I will try again.

Anyhow, here is the M13!

Full image here: https://skydrive.liv...uthkey=!ANa3...

Attached Files



#2212 haytor

haytor

    Apollo

  • -----
  • Posts: 1231
  • Joined: 29 Nov 2007
  • Loc: Smethwick near Birmingham UK.

Posted 13 August 2013 - 03:49 AM

rockstarbill, thats a nice capture of M13 :waytogo: :bow:,you have captured the "propeller"(sp?) nicely at the core, core is not blown out which is always nice to see.

What time exposures did you use and how many subs stacked??

Nice work,

best regards,

Tom.

#2213 rockstarbill

rockstarbill

    Mariner 2

  • -----
  • Posts: 211
  • Joined: 16 Jul 2013
  • Loc: Snohomish, WA

Posted 13 August 2013 - 03:55 AM

This was 40 subs at 30 seconds each. No flats, as I really have not found a good method for taking flats in either DSLR set up or with Hyperstar.

Edit: Where are my manners, thank you very much for the positive remarks! :)

#2214 Tel

Tel

    Cosmos

  • *****
  • Posts: 9125
  • Joined: 31 Mar 2006
  • Loc: Wallingford England

Posted 13 August 2013 - 04:01 AM

Hi RockstarBill,

Congratulations on a very fine image of M13 ! :bow::bow:

As Tom has said, you've kept the core well in check with no over exposure.

I did however have a quick "look" at in P/Shop, (sorry, I can never resist), and I think you'll find you can pull even more data from this image without over-exposing the core.

By the way, I can appreciate the difficulties in focusing a Hyperstar system since at f/2 or thereabouts, the "sweet spot" is very small, but how do intend to use a Bahtinov mask with the Hyperstar in place ?

Best regards,
Tel

#2215 rockstarbill

rockstarbill

    Mariner 2

  • -----
  • Posts: 211
  • Joined: 16 Jul 2013
  • Loc: Snohomish, WA

Posted 13 August 2013 - 04:04 AM

Hi RockstarBill,

Congratulations on a very fine image of M13 ! :bow::bow:

As Tom has said, you've kept the core well in check with no over exposure.

I did however have a quick "look" at in P/Shop, (sorry, I can never resist), and I think you'll find you can pull even more data from this image without over-exposing the core.

By the way, I can appreciate the difficulties in focusing a Hyperstar system since at f/2 or thereabouts, the "sweet spot" is very small, but how do intend to use a Bahtinov mask with the Hyperstar in place ?

Best regards,
Tel


Thanks! The image you see if you look at the "full version" is only slightly processed as I still need to work on my processing skills! Feel free to give it a go!

The mask I bought has a hole in it to allow it to pass over the secondary, and since the QHY8L is smaller in diameter than the secondary, it will cover the area of the primary just fine. :)

I am uploading the stacked and completely unprocessed version now... I have slow DSL here (cable is being installed; it required construction though)... So once it is there I will share a link to that too.

#2216 Tel

Tel

    Cosmos

  • *****
  • Posts: 9125
  • Joined: 31 Mar 2006
  • Loc: Wallingford England

Posted 13 August 2013 - 04:35 AM

Hi Rockstarbill,

Bahtinov mystery solved and thanks for the invitation to take a look at your M13 in P/Shop ! :bow::bow:

Here, attached, is what I've pulled from the original image after about 10 minutes P/Shop CS2 processing, (which is probably sufficient). I hope it meets with your approval.

Incidentally, how are you going about taking "Flats" ? This image was not at all bad in terms of vignetting, (mainly just a little towards the top left corner).

Once more, congratulations on a very nice, not overexposed image which is, in my opinion, paramount to further processing whatever the software used.

Best regards,
Tel

Attached Files



#2217 rockstarbill

rockstarbill

    Mariner 2

  • -----
  • Posts: 211
  • Joined: 16 Jul 2013
  • Loc: Snohomish, WA

Posted 13 August 2013 - 04:45 AM

I took no flats. I am actually terrible at it, and could use some help with how to take good flats in both configurations (DSLR and Hyperstar). Ive tried the T-shirt ideas, the twilight ideas, and I think I am just not clear on how to grade them when I am taking them. :confused:

That image looks great, Tel! The one thing I was trying to preserve when I was processing was the slight orange-ish glow from the prominent foreground stars in the cluster. The authenticity they lended was important to me, but as I pushed the processing they all but got drowned out and ended up white. That is why I processed it to the point where I left it.

The stacked and aligned version is here:
https://skydrive.liv...uthkey=!ALy2...

Thank you for the kind words. I am really new at photography entirely. So I have spent a great deal of time working on exposure times, getting really good at framing (note the framing on that is pretty much dead on), and that night I just got lucky and it all came together nicely.

Sadly, CCD imaging requires me to learn gain and offset, as opposed to ISO with DSLR's so I am back to more Greek! :(

Note: I did use Gradient Xterminator on the version you worked with in PS.

#2218 Tel

Tel

    Cosmos

  • *****
  • Posts: 9125
  • Joined: 31 Mar 2006
  • Loc: Wallingford England

Posted 13 August 2013 - 04:50 AM

Or maybe this version ?

I have now noticed that there is a little more light gradient than I first thought, so I've tried to reduce it further through a few P/Shop "Dirty Tricks".

Best regards,
Tel

Attached Files



#2219 rockstarbill

rockstarbill

    Mariner 2

  • -----
  • Posts: 211
  • Joined: 16 Jul 2013
  • Loc: Snohomish, WA

Posted 13 August 2013 - 05:01 AM

Or maybe this version ?

I have now noticed that there is a little more light gradient than I first thought, so I've tried to reduce it further through a few P/Shop "Dirty Tricks".

Best regards,
Tel


Again - nice job sir! I need to spend some time working on processing skill development. I really want to get a bunch of data and then process it all over and over and over to learn from. The problem with that is those darned clouds... :roflmao:

#2220 Tel

Tel

    Cosmos

  • *****
  • Posts: 9125
  • Joined: 31 Mar 2006
  • Loc: Wallingford England

Posted 13 August 2013 - 05:11 AM

Hi Rockerbill,

Your skill in framing and choice of exposure time, (certainly as far as this image is concerned), is second to none. :bow::bow:

Given though you've employed the Gradient Xterminator I'm surprised the vignetting in this image wasn't eliminated.

Actually I've no experience with this particular "Plug In" to P/Shop: I, in fact, applied another "Dirty Trick" which our CN friend and colleague Uggbits taught me sometime ago.

I have to say that it doesn't work consistently but can often be effective. If you have P/Shop, I'm sure Uggs" wouldn't mind if I share it with you !

As to taking Flats, it looks as if you've tried the "Usual".

Leave it with me: I'll see what I can come up with.

Meantime, others might be able to help you better in this respect over on one of the "photographic" forums.

Incidentally, what capture software are you using ?

Best regards,
Tel

#2221 rockstarbill

rockstarbill

    Mariner 2

  • -----
  • Posts: 211
  • Joined: 16 Jul 2013
  • Loc: Snohomish, WA

Posted 13 August 2013 - 05:15 AM

Thanks! I think of exposure and framing as core things you have to be good at!

I used it on its least agressive settings, as the higher ones killed stars and I wasnt ok with that. :) Killing stars isnt cool unless there is nebula in their wake, I say!

I capture with Nebulosity 3, process in Photoshop CS6 Extended.

#2222 rockstarbill

rockstarbill

    Mariner 2

  • -----
  • Posts: 211
  • Joined: 16 Jul 2013
  • Loc: Snohomish, WA

Posted 13 August 2013 - 05:37 AM

I threw a few moments of PS on this...

Attached Files



#2223 Tel

Tel

    Cosmos

  • *****
  • Posts: 9125
  • Joined: 31 Mar 2006
  • Loc: Wallingford England

Posted 13 August 2013 - 06:33 AM

You're way ahead of me in your capture and processing kit : I merely work with Nebulosity 2 and P/Shop CS2. However, that's handy because I would think you can carry out any operation, (and indeed more), than my software can come up with.

Try perhaps testing the effect of using the "Auto Levels" followed by the "Auto Contrast" followed by the "Auto Colour" on this image of M13. It's something I usually do. It often makes for a good basis on which to work but not always, in which case any of the features it produces you don't like, can easily be deleted.

In this case it does seem to work, followed up by visiting "Shadow and Highlight" where, try moving the "Shadow" a little to the left.

Follow this up with a +11 on the "Contrast" and a -11 on the "Brightness", (using the "Brightness and Contrast" tool), and I think it produces a very acceptable image.

By the way, if you'd like me to pass on that "Dirty Trick" regarding gradient elimination, let me know.

Good imaging ! :waytogo:

Best regards,
Tel

#2224 rockstarbill

rockstarbill

    Mariner 2

  • -----
  • Posts: 211
  • Joined: 16 Jul 2013
  • Loc: Snohomish, WA

Posted 13 August 2013 - 03:18 PM

Thanks Tel! Feel free to pass on that trick. :)

#2225 Tel

Tel

    Cosmos

  • *****
  • Posts: 9125
  • Joined: 31 Mar 2006
  • Loc: Wallingford England

Posted 13 August 2013 - 05:04 PM

Hi Rockstarbill,

You're most welcome. Forgive me though if I don't put the method together tonight as it's now just after 11:00pm here in the UK, and I need my beauty sleep; (more than most) !

So saying therefore, I'll put the details of that piece of imaging trickery together for you and despatch them in the morning.

Best regards,
Tel






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics