Search found 30241 matches

by marktownley
Fri Mar 02, 2012 7:01 pm
Forum: This is SolarChat !!
Topic: March 2nd H-ALpha Images
Replies: 13
Views: 510

Re: March 2nd H-ALpha Images

Great images Andrea! That setup is working really well for you. What focal ratio were the individual panes recorded at?

A very happy birthday to you too btw :)
by marktownley
Fri Mar 02, 2012 6:16 pm
Forum: Solar Scope Modifications
Topic: DIY Helical focuser for PST mod
Replies: 4
Views: 1508

Re: DIY Helical focuser for PST mod

Excellent mod - the cheaper options are always the best B)
by marktownley
Fri Mar 02, 2012 6:15 pm
Forum: Solar Scope Modifications
Topic: 150mm f8 - White light with Herschel Wedge
Replies: 11
Views: 894

Re: 150mm f8 - White light with Herschel Wedge

You should consider the 705nm TiO2 filter, will handle poor seeing better and has IR cut built in, so no need for uv/IR cut filter aswell, also is considerably cheaper... ;)
by marktownley
Fri Mar 02, 2012 3:01 pm
Forum: Solar Scope Modifications
Topic: 150mm f8 - White light with Herschel Wedge
Replies: 11
Views: 894

Re: 150mm f8 - White light with Herschel Wedge

Sounds exciting Ken! You'll have fun with that new scope - do you have a narrowband filter to use with it in mind?

Have a safe journey down under btw :)
by marktownley
Fri Mar 02, 2012 2:53 pm
Forum: This is SolarChat !!
Topic: Baader Continuum Solar Filter
Replies: 12
Views: 564

Re: Baader Continuum Solar Filter

http://solarchat.natca.net/index.php/en/this-is-solar-chat/13-solar-astronomy-shop-and-swap/775-white-light-filters-for-sale If you're interested drop me an email marktownley2000 at yahoo.co.uk I'm at work at the moment, and very shortly will be out for usual friday drinkies, so will likely pick up ...
by marktownley
Fri Mar 02, 2012 2:21 pm
Forum: This is SolarChat !!
Topic: Do you use any filter for HA imaging?
Replies: 40
Views: 1126

Re: Do you use any filter for HA imaging?

Mark, No...don't get confused with my spectral trace - it only covers down to about 580nm... I have tested "bare" etalons which show the whole spectrum. Obviously with the ERF still in place, I'm sure if I went down to the 500nm wavelength it would start blocking... (I've editted my previous messag...
by marktownley
Fri Mar 02, 2012 2:16 pm
Forum: This is SolarChat !!
Topic: Todays Bird
Replies: 12
Views: 853

Re: Todays Bird

Great shots!!! I think your pore is a dust mote as doesn't appear to show any of the fore shortening that would expect with a feature so close to the limb, but, then again, could be wrong! :)
by marktownley
Fri Mar 02, 2012 2:09 pm
Forum: This is SolarChat !!
Topic: Baader Continuum Solar Filter
Replies: 12
Views: 564

Re: Baader Continuum Solar Filter

It's still available if you want it...
by marktownley
Fri Mar 02, 2012 2:05 pm
Forum: This is SolarChat !!
Topic: Do you use any filter for HA imaging?
Replies: 40
Views: 1126

Re: Do you use any filter for HA imaging?

[quote]Great. I made a simple tilting mechanism. As soon as I got the filters I'll post pictures of it showing (if and) how it works.

How are you achieving the focal ratio needed for the omegas to work?
by marktownley
Fri Mar 02, 2012 2:03 pm
Forum: This is SolarChat !!
Topic: Do you use any filter for HA imaging?
Replies: 40
Views: 1126

Re: Do you use any filter for HA imaging?

Mark, Yes. I haven't the courage to pull the SM60's apart..... This is very interesting! Take a look at the following transmission curve for the SM60 etalon Cor-SM60-log by Mark Townley, on Flickr Quite clearly there shouldn't be any output in theory below ~500nm, however looking at your curve ther...
by marktownley
Fri Mar 02, 2012 7:53 am
Forum: This is SolarChat !!
Topic: Do you use any filter for HA imaging?
Replies: 40
Views: 1126

Re: Do you use any filter for HA imaging?

Was the ERF in place on the etalon?
by marktownley
Fri Mar 02, 2012 7:33 am
Forum: This is SolarChat !!
Topic: Do you use any filter for HA imaging?
Replies: 40
Views: 1126

Re: Do you use any filter for HA imaging?

Was the light source a broadband source I take it Ken? sunlight?
by marktownley
Fri Mar 02, 2012 7:23 am
Forum: This is SolarChat !!
Topic: Old Sol in a different light
Replies: 7
Views: 346

Re: Old Sol in a different light

Very fiery Jim!!! :)
by marktownley
Fri Mar 02, 2012 7:22 am
Forum: This is SolarChat !!
Topic: Appenzellersonne 1th march
Replies: 22
Views: 679

Re: Appenzellersonne 1th march

Hi Mark, Hi Apollo

thank you very much: Yes I hope too to have more sunshine and in fact we will be having today a perfect sunny day, but I have to work :(

Last 2 days have been like that for me too walter, I can sympathise! :(
by marktownley
Fri Mar 02, 2012 7:15 am
Forum: This is SolarChat !!
Topic: Do you use any filter for HA imaging?
Replies: 40
Views: 1126

Re: Do you use any filter for HA imaging?

Thanks Mark. I have friend that used them already with success. So I already elaborated with them some possible solution before buying :) I already read about the Groski setup. For now it's not my intention to build something like that. I'll try and see what I'll be able to do with them... always g...
by marktownley
Fri Mar 02, 2012 12:27 am
Forum: This is SolarChat !!
Topic: Feb 23rd - H-Alpha images
Replies: 37
Views: 1931

Re: Feb 23rd - H-Alpha images

[quote]How are you using the high pass filter in your images Andrea?

I just tried! WOW!!!
This is the best keep secret in post processing :D
Thanks my friend. This has looot of potential.

;)
by marktownley
Fri Mar 02, 2012 12:25 am
Forum: This is SolarChat !!
Topic: Appenzellersonne 1th march
Replies: 22
Views: 679

Re: Appenzellersonne 1th march

Hoorah! The sun finally returns to Switzerland! Great images Walter - hope there are many more to come! :)
by marktownley
Fri Mar 02, 2012 12:24 am
Forum: This is SolarChat !!
Topic: Full Disc White light 01/03/12 + Data
Replies: 5
Views: 280

Re: Full Disc White light 01/03/12 + Data

Excellent image! Wow, it is a quiet sun... :whistle:
by marktownley
Fri Mar 02, 2012 12:22 am
Forum: This is SolarChat !!
Topic: Do you use any filter for HA imaging?
Replies: 40
Views: 1126

Re: Do you use any filter for HA imaging?

[quote]with antireflective coating i get much better surface details This could well be a pertinent thing; since removing my mini-erf from the blocker I have found I have extra reflections I have to deal with. I don't doubt the narrow bandpass that is recorded spectrally from Ha arrangements, but if...
by marktownley
Fri Mar 02, 2012 12:16 am
Forum: This is SolarChat !!
Topic: Do you use any filter for HA imaging?
Replies: 40
Views: 1126

Re: Do you use any filter for HA imaging?

Hi Andrea, The filters you have bought from EBay HAVE to be used together in a tilt tune arrangement for them to work, in a telecentric beam f30ish or longer. You will find it very difficult to incorporate them into any Ha system you are running already, in a double stack arrangement, if thats where...
by marktownley
Thu Mar 01, 2012 7:16 pm
Forum: This is SolarChat !!
Topic: Do you use any filter for HA imaging?
Replies: 40
Views: 1126

Re: Do you use any filter for HA imaging?

Surely the two HA filters will do a muche better job :D

Depends how you use them ;)

What are your plans?
by marktownley
Thu Mar 01, 2012 6:44 pm
Forum: This is SolarChat !!
Topic: Do you use any filter for HA imaging?
Replies: 40
Views: 1126

Re: Do you use any filter for HA imaging?

Sometimes a 'dimming' of the image is all that is required to increase perceived contrast.

*thinks passing clouds when viewing Ha at the eyepeice*
by marktownley
Thu Mar 01, 2012 6:42 pm
Forum: This is SolarChat !!
Topic: My submission at Pro Am meet, Delhi
Replies: 6
Views: 310

Re: My submission at Pro Am meet, Delhi

Lurve those pictures...
by marktownley
Thu Mar 01, 2012 6:40 pm
Forum: This is SolarChat !!
Topic: Feb 26th Images - revisited
Replies: 4
Views: 273

Re: Feb 26th Images - revisited

Excellent, I think number 1 is the best! :)
by marktownley
Thu Mar 01, 2012 6:39 pm
Forum: This is SolarChat !!
Topic: A Few Proms From Today
Replies: 8
Views: 349

Re: A Few Proms From Today

Cool pickies derek!!!