View Full Version : 1.75 hour image of the Helix Nebula

2006-May-30, 01:32 AM
Hello all
I have just joined up and here is my first image I have posed here.
Its a 1.75 hour image of the Helix Nebula made up of 7x15 minute images ISO 400 with my Hutech modified Canon 350D DSLR, 10 inch F5.6 Newtonian, Multiporpose Coma Corrector, UHCS and UV/IR filters. Off axis manually guided. Flats, darks and offsets processed in IRIS , the masking done in Photoshop, with Noiseware used as well.
I masked a dim version over a bright version to preserve inner detail while retaining the faint outer stuff like the northeast arc and northeast object, as shown here.


2006-May-30, 02:00 AM
Neat picture. Since you've already done a lot of processing, I'd suggest playing with the Curves in Photoshop a bit (if you don't know what I'm talking about, PM me and I'll be happy to explain more). It can help you to suppress the background skyglow (a huge issue where I am) without taking away too much from the fainter parts of the nebula.

But as I said, that's a great shot, and good luck in the future!

Dragon Star
2006-May-30, 02:14 AM
Excellent shot Scott, lots of full color, great job.

2006-May-30, 02:20 AM
a great shot! take on STU advice on curves you will see the improvement, well done.

2006-May-30, 02:46 AM
Thanks all.
yes Ive had a play with the curves in Photoshop, also the gamma in IRIS that seems to do a similar function.

Big Brother Dunk
2006-May-30, 03:46 AM
Very good!http://www.websmileys.com/sm/fingers/fing32.gif

2006-May-30, 07:04 AM
Great shot of helix nebula, please guide me for cutoff my camera IR filter(my camera: Canon EOS 30D)

2006-May-30, 09:49 AM
Cool- Absolutly amazing image! :D :clap:

2006-May-31, 05:10 AM
I want to block my camera IR filter, please guide me. My camera is Canon EOS 30D

2006-May-31, 10:13 AM
My camera is from Hutech http://www.sciencecenter.net/hutech/canon/index.htm
They get new cameras and replace the IR filter with either clear glass (my option) or a modified filter that lets in all the deep red hydrogen alpha light, they also modify existing cameras too I believe.

2006-May-31, 03:44 PM
Thanks for link, I have a Meade Broadband Nebular Filter, this filter work like your filter?

Histogram of filter work: http://www.meade.com/catalog/meade_4000/images/meade_4000_broadband_graph_112.jpg

Filter: http://www.meade.com/catalog/meade_4000/images/meade_4000_broadband_112.jpg

2006-May-31, 04:51 PM
Nice shot!
I'm always interested in seeing what others are doing with the Canon DSLR cameras. I'm using a Canon 10D (non modified) in my backyard observatory.



2006-Jun-01, 09:08 AM
Thanks Scott for link, I have a Meade Broadband Nebular Filter, this filter work like your filter?

Histogram of filter work: http://www.meade.com/catalog/meade_4..._graph_112.jpg

Filter: http://www.meade.com/catalog/meade_4...adband_112.jpg
If no, IDAS UV/IR Blocking filter better or Clear filter?

2006-Jun-01, 10:49 AM
quite awsome!
beautiful photo, tornado

thanks for sharing

ps: welcome to BAUT, friend

2006-Jun-02, 01:56 PM
Thanks all :)

Yes the meade one is similar to my uhc-s. The H alpha component as well as the oxygen is great for nebulas. For modified cameras the uv/ir filter is also recommended to stop excess infre red light getting through.

2006-Jun-02, 08:08 PM
Thanks Scott for guide me, i want to take IR/UV cutoff filter but i'm not have a address or phonenumber for order this prodcut, do you have a phone number and address for buy this product?
Thanks a lot
and please give me your E-mail for i contact with you, Thanks
Best Wishes

2006-Jun-04, 01:44 PM
I got my filter from Hutech, in the USA, the price list here
Mine is
UIBAR-48 48mmm UV/IR blocking filter $129.00
It screws into a standard 2 inch telescope adaptor with a filter thread. Hutech are very good to deal with, and send their products promptly, my modified camera came from them also.
Baader Planatarium make good filters also. A dealer for them in USA is here
A friend has the Baader filter, it looks exactly the same as mine. Either work perfectly well and will reduce excess infra red light that causes bloated star images with refractors and lenses.