Search found 23100 matches

by marktownley
Mon Jan 22, 2018 8:39 pm
Forum: This is SolarChat !!
Topic: Would someone be kind enough to verify my figures in case i missed something please ;-)
Replies: 9
Views: 74

Re: Would someone be kind enough to verify my figures in case i missed something please ;-)

Yeah, the premise with the maths is essentially correct, but seeing as you're really running at 125mm aperture with the frac (i'm assuming you're always using the ERF with the quark) the gain with the C8 is greater than the numbers you came up with suggests. I've always found my quark works just fin...
by marktownley
Mon Jan 22, 2018 7:57 pm
Forum: This is SolarChat !!
Topic: Would someone be kind enough to verify my figures in case i missed something please ;-)
Replies: 9
Views: 74

Re: Would someone be kind enough to verify my figures in case i missed something please ;-)

You need to measure the free aperture of the ERF (it will be less than 135mm as some of it is held in the cell wall) to get the right numbers.
by marktownley
Mon Jan 22, 2018 7:31 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Recent Digital SHG
Replies: 4
Views: 47

Re: Recent Digital SHG

That works well!
by marktownley
Mon Jan 22, 2018 7:22 pm
Forum: This is SolarChat !!
Topic: HR Solar set up recommendation
Replies: 9
Views: 183

Re: HR Solar set up recommendation

I certainly found more fine detail at 120mm than I did at 100mm, however I only got a clear shot 25% of the time compared to 80% of the time with the 100mm. I think I would have struggled to do an animation with the Quark at 120mm whereas I have taken loads of animations with the 100mm. So it is a ...
by marktownley
Mon Jan 22, 2018 6:16 am
Forum: This is SolarChat !!
Topic: Sol from the 20th of January 2018.
Replies: 5
Views: 41

Re: Sol from the 20th of January 2018.

Those are excellent images Eric!
by marktownley
Sun Jan 21, 2018 5:59 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 2017 Annual Geomagnetic Data- Updated
Replies: 13
Views: 188

Re: 2017 Annual Geomagnetic Data- Updated

Excellent data Stu. I was saying at Liverpool Astro Society on friday evening that the significant majority of my Icelandic aurora observations over the years were a result of coronal holes apposed to CMEs. All makes sense really.
by marktownley
Sun Jan 21, 2018 4:56 pm
Forum: This is SolarChat !!
Topic: HR Solar set up recommendation
Replies: 9
Views: 183

Re: HR Solar set up recommendation

What are you not happy with regards the images?
by marktownley
Sun Jan 21, 2018 4:53 pm
Forum: This is SolarChat !!
Topic: Today's SUN (2180120) with GOOD seeing
Replies: 10
Views: 241

Re: Today's SUN (2180120) with GOOD seeing

Lots of flowers and great shots of the sun too!
by marktownley
Sun Jan 21, 2018 4:52 pm
Forum: This is SolarChat !!
Topic: 17 January
Replies: 9
Views: 114

Re: 17 January

Excellent set of images Brian!
by marktownley
Sun Jan 21, 2018 4:51 pm
Forum: This is SolarChat !!
Topic: Sol from the 15th and 16th of January 2018.
Replies: 13
Views: 172

Re: Sol from the 15th and 16th of January 2018.

Sorry to hear your news Derek. My thoughts are with you and your family.
by marktownley
Sun Jan 21, 2018 4:47 pm
Forum: This is SolarChat !!
Topic: 20th Ha disk
Replies: 5
Views: 64

Re: 20th Ha disk

Great disk Robert! I'm missing the sun down here!
by marktownley
Sun Jan 21, 2018 4:45 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Coronado Solarmax III
Replies: 6
Views: 485

Re: Coronado Solarmax III

All very quiet indeed isn't it Ken! I don't know of anyone with one. Coronado are about five years too late with this. Launching into solar minimum is a school boy error...
by marktownley
Sun Jan 21, 2018 4:40 pm
Forum: This is SolarChat !!
Topic: h-alpha flat box?
Replies: 7
Views: 92

Re: h-alpha flat box?

Interesting idea. Someone needs to give it a try!
by marktownley
Thu Jan 18, 2018 6:04 am
Forum: This is SolarChat !!
Topic: Sol from the 15th and 16th of January 2018.
Replies: 13
Views: 172

Re: Sol from the 15th and 16th of January 2018.

Looks good Eric, thanks for sharing. We did have a bit of blue sky yesterday, but I was at work, which is no good.
by marktownley
Wed Jan 17, 2018 6:36 am
Forum: This is SolarChat !!
Topic: SUN 16/1/2018
Replies: 7
Views: 132

Re: SUN 16/1/2018

Good capture!
by marktownley
Tue Jan 16, 2018 10:25 am
Forum: This is SolarChat !!
Topic: Noise, Firecapture and imaging questions
Replies: 49
Views: 950

Re: Noise, Firecapture and imaging questions

Montana wrote:
Tue Jan 16, 2018 8:42 am
Yes I would like to know Mark because those files are my best ever!
I have written to Emil but currently waiting for a response.

Alexandra
I'm guessing you captured them in FC2.3?
by marktownley
Tue Jan 16, 2018 6:56 am
Forum: This is SolarChat !!
Topic: Sol from the 14th of January 2018.
Replies: 3
Views: 76

Re: Sol from the 14th of January 2018.

Looking good Eric!
by marktownley
Tue Jan 16, 2018 6:50 am
Forum: This is SolarChat !!
Topic: Sol from the 13th of January 2018.
Replies: 3
Views: 53

Re: Sol from the 13th of January 2018.

Excellent images Eric! Be a couple of weeks at least for me before can image again.
by marktownley
Tue Jan 16, 2018 6:48 am
Forum: This is SolarChat !!
Topic: Noise, Firecapture and imaging questions
Replies: 49
Views: 950

Re: Noise, Firecapture and imaging questions

Reading on the PGR website, when cameras are put into '16 bit mode' as i'm describing ticking the 16 bit box in firecapture, all that happens is the extra bits are given a value of zero. So, still 8 bit data effectively in a 16 bit carrier. Intrigued as to how you got your PGR to output at 14 bit Al...
by marktownley
Mon Jan 15, 2018 11:24 pm
Forum: Solar Scope Modifications
Topic: Lunt 60 mod options??
Replies: 18
Views: 245

Re: Lunt 60 mod options??

Yes, lots of ways, lots of people have done it. Start searching the threads in the mods section.
by marktownley
Mon Jan 15, 2018 11:20 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Some Natural Spectroscopy!
Replies: 5
Views: 130

Re: Some Natural Spectroscopy!

Fantastic! I'm always looking up for atmospheric optics, fascinating to see.
by marktownley
Mon Jan 15, 2018 5:26 pm
Forum: This is SolarChat !!
Topic: 235mm ERF- 9.25 Edge or Standard?
Replies: 3
Views: 163

Re: 235mm ERF- 9.25 Edge or Standard?

I don't think there will be a huge amount of difference