G-Band and H-Alpha Images from Singapore (New images added)

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G-Band and H-Alpha Images from Singapore (New images added)

Post by yltansg »

The setup

G-Band with ARIES D-ERF on a C8
Image

H-Alpha with Baader ERF on a 150mm OMNI XLT refractor
Image

G-Band Image with ARIES D-ERF & G-Band on a C8
Image

H-Alpha Image with Baader D-ERF on a 150mm Celestron OMNI XLT refractor
Image
Last edited by yltansg on Fri Apr 06, 2018 9:45 am, edited 2 times in total.


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Re: G-Band and H-Alpha Images from Singapore

Post by robert »

Wonderful clear granulation, lovely
Robert


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Re: G-Band and H-Alpha Images from Singapore

Post by marktownley »

Really exquisite images Alfred. The granulation is some of the best i've seen. I envy your seeing and clear skies!


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Re: G-Band and H-Alpha Images from Singapore

Post by MapleRidge »

Excellent images Alfred...well done :bow

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Re: G-Band and H-Alpha Images from Singapore

Post by ffellah »

Granulation is spectacular, the Ha is excellent, Alfred.

Keep posting, please.....

Franco


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Re: G-Band and H-Alpha Images from Singapore

Post by eroel »

Alfred:
A super granulation image.
Best regards,
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Re: G-Band and H-Alpha Images from Singapore

Post by yltansg »

Thanks Robert, Mark, Brian, Franco and Eric for your kind comments.

Mark - the seeing was so so. I was pleasantly surprised to see the quality of the PP images.


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Re: G-Band and H-Alpha Images from Singapore

Post by yltansg »

Here is another G-Band image taken on the same day taken 1 minute earlier

Image

Here is another one taken 2 minute later

Image


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Re: G-Band and H-Alpha Images from Singapore

Post by pedro »

Great resolution Alfred. Which filter did you use in front of the camera?

G-Band Image with ARIES D-ERF on a C8


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Re: G-Band and H-Alpha Images from Singapore

Post by yltansg »

pedro wrote: Thu Apr 05, 2018 3:57 pm Great resolution Alfred. Which filter did you use in front of the camera?

G-Band Image with ARIES D-ERF on a C8
Hi Pedro,

Yes, G-band images on granulations were taken with ARIES D-ERF and G-band on a C8 :)

Seeing became worst today. No decent images :(

Alfred


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Re: G-Band and H-Alpha Images from Singapore

Post by pedro »

Thanks for your reply. I guess the G-band filter is from Edmund Scientific


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Re: G-Band and H-Alpha Images from Singapore

Post by Valery »

Hi Alfred,

Great images with the C8 at the G-band ! These ones are among the best I ever saw with 8" telescopes.

Wish you more great seeing weather.


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Re: G-Band and H-Alpha Images from Singapore

Post by marktownley »

Stunning detail Alfred! I can only hope for conditions this good!


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Re: G-Band and H-Alpha Images from Singapore

Post by yltansg »

pedro wrote: Thu Apr 05, 2018 7:17 pm Thanks for your reply. I guess the G-band filter is from Edmund Scientific
Hi Pedro,

The G-Band filter is from Edmund Optics. It is a 25mm 430/10nm filter. I wasn't able to find a suitable casing for it to be "converted" to 1.25 inch. This is my improvisation - I used Blu Tack (useable plastic adhesive) to hold it in a Mallincam IR blocking cell. The IR blocking filter works well with the 430nm filter to produce fine granulations provided there is fair seeing.

Image


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Re: G-Band and H-Alpha Images from Singapore

Post by pedro »

Thanks for your reply Alfred. I have to get one of these


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Re: G-Band and H-Alpha Images from Singapore

Post by marktownley »

Are you using a SSM Alfred?


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Re: G-Band and H-Alpha Images from Singapore

Post by yltansg »

marktownley wrote: Fri Apr 06, 2018 9:25 am Are you using a SSM Alfred?
Hi Mark,

I have a SSM and also Genika & Basler :) But have just not gotten down to use the SSM to control acquisition with Genika.

Alfred


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Re: G-Band and H-Alpha Images from Singapore

Post by yltansg »

Using the 3-Band AIRES D-ERF & Celestron C8, I reconfigured it as follows:

Image

Over time I have collected 5 PST etalons which I wanted to use on this D-ERF and also a 14" ARIES D-ERF:

Image

Had 2 runs with 1 etalon in extremely poor seeing:

Image

Image


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by marktownley »

You have a lot of PST etalons Alfred :D


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by Montana »

WOW!!! the granulation is to die for :shock: :shock: :shock:
:bow :bow :hamster:
Alexandra


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by Carbon60 »

Wonderful images, Alfred. Superb granulation.

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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by yltansg »

Thanks Alexandra and Stu for your compliments. Some times I have this feeling it is easier to get the granulations on the ARIES DREF-C8-GBand filter than high-resolution H-Alpha images with ARIES DERF-C8-PST etalon. But thinking about it, I usually do G-Band imaging when seeing is good. I must make the change so I can test and rank their quality.

Mark - you mentioned - [You have a lot of PST etalons Alfred :D]
I am trying to find very good PST etalons for the ARIES14" D-ERF that will be delivered soon :)

Alfred


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by Ronnie_Clayton »

Your H-Alpha images are awsome, but your G-Band images are absolutely amazing!!!!!

Ronnie


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by yltansg »

Ronnie_Clayton wrote: Sun Apr 08, 2018 12:39 am Your H-Alpha images are awsome, but your G-Band images are absolutely amazing!!!!!

Ronnie
Hi Ronnie,

The better H-Alpha image was from a 150mm refractor fitted with a 160mm ARIES D-ERF, taken at 11:50am local time. Here are two more images taken on the same day using the same setup:

Image
Taken at 9:21am

Image
Taken at 9:28 am local time

Alfred


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by Derek Klepp »

A great session Alfred and thanks for all the feed back with all the various filter types.
Regards Derek


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by yltansg »

Derek Klepp wrote: Sun Apr 08, 2018 9:29 am A great session Alfred and thanks for all the feed back with all the various filter types.
Regards Derek
Derek and All,

I must thank everyone for their generous sharing which has made my learning journey smooth and fun. Hence I will make it a point to chip in as well.

Alfred


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by marktownley »

Alfred, can you describe your sharpening routine with the granulation shots please?


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by pedro »

I'm also interested in your image processing routines and how many images you combine (I guess less than 10)


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by yltansg »

marktownley wrote: Sun Apr 08, 2018 12:58 pm Alfred, can you describe your sharpening routine with the granulation shots please?
Hi Pedro and Mark,

My processing:

a. Step 1: I use AS!2 to stack about 180 to 200 frames from a recording of about 4000 frames.
b. Step 2: Next I use the LR deconvolution and Unsharp masking in ImPPG to post process the stacked image.
c. Step 3: The final step is to do noise reduction first with Topaz Denoise followed by other processing in PS (e.g. unsharp mask, contrast adjustment, level, curve stretch etc). I find doing the Topaz Denoise a crucial step before final PS pp.

As for PS processing, it is an art thing - just do different tweaks to get desired effects :)

To All - please share your sharpening routine. I would like to learn from you too.

Alfred


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by yltansg »

pedro wrote: Sun Apr 08, 2018 1:30 pm I'm also interested in your image processing routines and how many images you combine (I guess less than 10)
Hi Pedro,

I notice that Christian stack very few images. I have tried it but the outcome was poor. For my recordings and processing, I need to stack more than 130 frames to get sharp granulations. I think the secret to stacking fewer frames is in the way the post processing is done. Must learn it from Christian.

Alfred


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by Bruce Girrell »

The G band granulation is very sharp!
Great images


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by Ronnie_Clayton »

WOW, incredible h-alpha images Alfred :shock:
Congratulations!


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Re: G-Band and H-Alpha Images from Singapore (New images added)

Post by yltansg »

Thanks Bruce and Ronnie for your kind comments. I have re-configured the C8 for H-A imaging. I will not be doing G-Band images for the time being.


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