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by marktownley
Sat Mar 03, 2012 5:20 pm
Forum: Solar Scope Modifications
Topic: CaK PST - Filter sizes
Replies: 17
Views: 663

Re: CaK PST - Filter sizes

That's a great resource, thanks Joe! :)
by marktownley
Sat Mar 03, 2012 5:05 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?

I'm more than happy about that. Probably with some HA filter results may be even better. I refer to filters like the ones used for DS (between 6-10nm). I still have to try with them. Today I recorded a couple videos, with and without the Neodymium. I'll post the raw stacked images probably tomorrow...
by marktownley
Sat Mar 03, 2012 5:01 pm
Forum: This is SolarChat !!
Topic: Sun 3rd March
Replies: 16
Views: 746

Re: Sun 3rd March

Excellent images Alexandra! Todays double stack sun was oozing with detail B)
by marktownley
Sat Mar 03, 2012 4:49 pm
Forum: This is SolarChat !!
Topic: WL SUN (20120303) LUNT152 (high clouds)
Replies: 8
Views: 310

Re: WL SUN (20120303) LUNT152 (high clouds)

Lovely shot! I have data for a WL full disk to process from today too...
by marktownley
Sat Mar 03, 2012 4:47 pm
Forum: This is SolarChat !!
Topic: LUNT CaK 1200 first light
Replies: 20
Views: 1064

Re: LUNT CaK 1200 first light

Fantastic start with that CaK module Pedro! I see we shared the same rain band today - it was stretching all across western europe. The Atlantic air is moving in!
by marktownley
Sat Mar 03, 2012 4:41 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?

Hi everyone, I'm just curious. Do you use any filter for your HA video recording? Personally I've been using a UHC/LPR Filter by Celestron but since a few days I'm using the Baader Neodymium (Skyglow). I find that both increase the contrast. The new Baader Neodymium works even better than the Celes...
by marktownley
Sat Mar 03, 2012 2:55 pm
Forum: Solar Scope Modifications
Topic: CaK PST - Filter sizes
Replies: 17
Views: 663

Re: CaK PST - Filter sizes

Yes. But the filter(s) being tilted can only go towards the blue.. So, if the Omega is 80A centred pretty well on the CaK line then any "clipping" by say, a tilted Baader B would/could only apply to the region below the 3934A - this still leave the other 40A or so bandpass to the red side of the Om...
by marktownley
Sat Mar 03, 2012 2:53 pm
Forum: This is SolarChat !!
Topic: March 3rd Huge Sunspot Mosaic
Replies: 13
Views: 707

Re: March 3rd Huge Sunspot Mosaic

A fantastic view from Italy!!!!
by marktownley
Sat Mar 03, 2012 2:36 pm
Forum: This is SolarChat !!
Topic: Appenzellersonne 3rd march, first light PST mod
Replies: 53
Views: 2652

Re: Appenzellersonne 3rd march, first light PST mod

Hi Mark

I'm not that sure about that deal, in fact it isn't a deal, is it? Maybe the PST etalon will not survive the summer sun load . Will see.

You won't get a better offer than that ;) :P

What ERF are you using?
by marktownley
Sat Mar 03, 2012 2:34 pm
Forum: Solar Scope Modifications
Topic: CaK PST - Filter sizes
Replies: 17
Views: 663

Re: CaK PST - Filter sizes

The trick would be to get tilt tuner that is compatible with a scope that operates on a vernier scale - ie the ability to make really small changes in the angle of tilt... This is the holy grail that will really get the filter thingy going properly...
by marktownley
Sat Mar 03, 2012 2:32 pm
Forum: This is SolarChat !!
Topic: New big sunspot, 3 March 2012
Replies: 13
Views: 608

Re: New big sunspot, 3 March 2012

Great shot Dennis, glad you're here! B)
by marktownley
Sat Mar 03, 2012 2:31 pm
Forum: This is SolarChat !!
Topic: Question about WL viewing
Replies: 5
Views: 289

Re: Question about WL viewing

For visual, I would say get the Baader continuum, but others may say different...
by marktownley
Sat Mar 03, 2012 2:29 pm
Forum: This is SolarChat !!
Topic: Appenzellersonne 3rd march, first light PST mod
Replies: 53
Views: 2652

Re: Appenzellersonne 3rd march, first light PST mod

Cool stuff! I think you should give me your 100mm Lunt, you have no need for it anymore ;)
by marktownley
Sat Mar 03, 2012 1:49 pm
Forum: This is SolarChat !!
Topic: Appenzellersonne 3rd march, first light PST mod
Replies: 53
Views: 2652

Re: Appenzellersonne 3rd march, first light PST mod

Thats a stunner Walter! More please!!!!
by marktownley
Sat Mar 03, 2012 12:38 pm
Forum: This is SolarChat !!
Topic: New Spot 3.03.2012
Replies: 12
Views: 583

Re: New Spot 3.03.2012

That's nice! B)
by marktownley
Sat Mar 03, 2012 12:34 pm
Forum: Solar Scope Modifications
Topic: CaK PST - Filter sizes
Replies: 17
Views: 663

Re: CaK PST - Filter sizes

Has anyone experience of only the Baader K line used after a Baader B CCD filter????

Yes, just the same as using the K-Line alone...
by marktownley
Sat Mar 03, 2012 9:21 am
Forum: Solar Scope Modifications
Topic: CaK PST - Filter sizes
Replies: 17
Views: 663

Re: CaK PST - Filter sizes

OK, getting the picture... That being the case is there any real value in investing in the CaK PST as a filter source??? Or just go with the Baader B and the Omega 80a combo???? Crucial thing is going to be whether the ovelap works to go from an passband in the tens of angstrom to one down to a cou...
by marktownley
Sat Mar 03, 2012 9:03 am
Forum: Solar Scope Modifications
Topic: CaK PST - Filter sizes
Replies: 17
Views: 663

Re: CaK PST - Filter sizes

Most definitely multiple elements. When I was making my module I completely disassembled it optically - just to see what was going on inside. The very front (objective side) element has a yellow / blue reflection to it - I think this has IR cut, if memory serves theres another filter below this, the...
by marktownley
Sat Mar 03, 2012 8:23 am
Forum: Solar Scope Modifications
Topic: CaK PST - Filter sizes
Replies: 17
Views: 663

Re: CaK PST - Filter sizes

Hi Ken, The front trim filter is 20mm in diameter and the final trim filter is indeed 5mm diameter. All other bits of filter in between are 20mm. However, this is where modders heaven comes into play - the final trim filter is easily replaced with a Baader K-Line or Omega 80a CaK filter, which are >...
by marktownley
Sat Mar 03, 2012 8:11 am
Forum: This is SolarChat !!
Topic: Interesting...
Replies: 6
Views: 398

Re: Interesting...

Yes, interesting stuff Jim. There is a issue in the april issue of 'Astronomy' by Tony Hallas in his 'Imaging the Cosmos' section talks about the limits of the maximun number of frames that be used to combine images - well worth a read if you have a copy... I think that with excellent data there is ...
by marktownley
Sat Mar 03, 2012 7:55 am
Forum: This is SolarChat !!
Topic: Rain and a Repro of Dec 28th Image in Good Seeing
Replies: 9
Views: 442

Re: Rain and a Repro of Dec 28th Image in Good Seeing

Thats a fantastic shot Ted, I think your processing is absolutely spot on! B)
by marktownley
Fri Mar 02, 2012 10:45 pm
Forum: This is SolarChat !!
Topic: GSTAREX Sun Magnification
Replies: 6
Views: 268

Re: GSTAREX Sun Magnification

Excellent montage Derek! B) Thanks
by marktownley
Fri Mar 02, 2012 10:42 pm
Forum: This is SolarChat !!
Topic: March 2nd H-ALpha Images
Replies: 13
Views: 510

Re: March 2nd H-ALpha Images

They look good Andrea! You have a great weekend too! :)
by marktownley
Fri Mar 02, 2012 9:10 pm
Forum: This is SolarChat !!
Topic: Smart Sharpen & Reflected Sunlight...
Replies: 11
Views: 549

Smart Sharpen & Reflected Sunlight...

Despite clear daytime skies afternoon meetings at work have meant i've not been able to get home in time to image the sun; however the moon in the evening sky was too good to miss - here's one from a couple of days ago... This was taken with the 70mm frac @ f15 (2.5x powermate used) DMK31, mosaic as...
by marktownley
Fri Mar 02, 2012 7:46 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

Hmmm, there's not too much TiO2 in a G2V star...I'd think the Cak would be a better bet. I have both, and with a 80A cak you will get consistently better results with the TiO2 from a seeing point of view alone. I say this though coming from the land of poor seeing, if you have uber good seeing cond...