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

Excellent mod - the cheaper options are always the best B)

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...

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

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 ...

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...

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!

It's still available if you want it...

[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?

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...

Was the ERF in place on the etalon?

Was the light source a broadband source I take it Ken? sunlight?

Very fiery Jim!!!

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!

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...

[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
Thanks my friend. This has looot of potential.

;)

Hoorah! The sun finally returns to Switzerland! Great images Walter - hope there are many more to come!

Excellent image! Wow, it is a quiet sun... :whistle:

[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...

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...

Surely the two HA filters will do a muche better job

Depends how you use them

What are your plans?

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

*thinks passing clouds when viewing Ha at the eyepeice*

Lurve those pictures...

Excellent, I think number 1 is the best!

Cool pickies derek!!!