Search found 7302 matches
- Tue Mar 02, 2021 9:42 pm
- Forum: Solar Scope Modifications
- Topic: Sweet spot, banding and tilted etalons ...where are the limits ?
- Replies: 47
- Views: 513
Re: Sweet spot, banding and tilted etalons ...where are the limits ?
Hi all... This is quite the read, and need to go over it a few more times. I have a question about the sweet spot ration from the d/D ratio. Does the result, say .2, have any units associated with it or is it 0.2 of the actual field of view, or some other relative detail? Just trying to make sense o...
- Tue Mar 02, 2021 9:36 pm
- Forum: Solar Scope Modifications
- Topic: OTA baffle hack for easy filter / optic install ; internal Ir/UV - plano concave
- Replies: 3
- Views: 62
Re: OTA baffle hack for easy filter / optic install ; internal Ir/UV - plano concave
I used this method to mount the 110mm D-ERF inside the tube of the 150mm Celestron refractor that I modified.
As you say, works like a charm.
Brian
As you say, works like a charm.
Brian
- Tue Mar 02, 2021 3:26 pm
- Forum: This is SolarChat !!
- Topic: Today's SUN (20210301) | SM90II - not just a paperweight
- Replies: 15
- Views: 223
Re: Today's SUN (20210301) | SM90II - not just a paperweight
Another 90mm...I'll bet you want to be able to test it to ensure it is worth more than the 60mm equivalent value of the one you have
Brian

Brian
- Tue Mar 02, 2021 3:23 pm
- Forum: This is SolarChat !!
- Topic: New Setup, New Pier 26th February
- Replies: 32
- Views: 259
Re: New Setup, New Pier 26th February
Hi Mark...
Great to see the pier installed and setup with your scopes...very impressive !!!
The solar images look equally great too...nice details all around
Brian
Great to see the pier installed and setup with your scopes...very impressive !!!
The solar images look equally great too...nice details all around

Brian
- Tue Mar 02, 2021 3:19 pm
- Forum: This is SolarChat !!
- Topic: I got 1 word for my new solarmax iii..
- Replies: 17
- Views: 161
Re: I got 1 word for my new solarmax iii..
Always nice to have the experience at the eyepiece support the decision to part with cash
Brian

Brian
- Tue Mar 02, 2021 3:17 pm
- Forum: This is SolarChat !!
- Topic: Partial and full disc views from the 26th
- Replies: 8
- Views: 71
Re: Partial and full disc views from the 26th
Superb images and that prom is wonderful catch
Brian

Brian
- Tue Mar 02, 2021 3:15 pm
- Forum: This is SolarChat !!
- Topic: Sun in Ha and CaK 1st March '21
- Replies: 6
- Views: 84
Re: Sun in Ha and CaK 1st March '21
Hi Stu...
Nice FD images from the session
Brian
Nice FD images from the session

Brian
- Tue Mar 02, 2021 3:08 pm
- Forum: This is SolarChat !!
- Topic: 1st March
- Replies: 8
- Views: 97
Re: 1st March
Great image Robert
Brian

Brian
- Tue Mar 02, 2021 3:07 pm
- Forum: This is SolarChat !!
- Topic: Fun in the Sun on Monday 1st March 2021
- Replies: 20
- Views: 166
Re: Fun in the Sun on Monday 1st March 2021
These are fabulous image Alexandra...well done
Brian

Brian
- Tue Mar 02, 2021 3:00 pm
- Forum: This is SolarChat !!
- Topic: three lights 27/2/21 still ss h alpha ds hasn't arrived yet bummer
- Replies: 10
- Views: 113
Re: three lights 27/2/21 still ss h alpha ds hasn't arrived yet bummer
A good set of FD images Dave...well done
Brian

Brian
- Tue Mar 02, 2021 2:58 pm
- Forum: This is SolarChat !!
- Topic: 2021-03-01 - A few quick lunchtime disks
- Replies: 10
- Views: 89
Re: 2021-03-01 - A few quick lunchtime disks
A very nice FD image Jochen
Brian

Brian
- Tue Mar 02, 2021 2:56 pm
- Forum: This is SolarChat !!
- Topic: 1.03.2021 A couple of snaps.
- Replies: 9
- Views: 91
Re: 1.03.2021 A couple of snaps.
Great images and the prom is especially impressive
Brian

Brian
- Tue Mar 02, 2021 2:54 pm
- Forum: This is SolarChat !!
- Topic: Sunday Sunshine - 28th February
- Replies: 7
- Views: 63
Re: Sunday Sunshine - 28th February
Superb series of images Mark...very well done
Brian

Brian
- Tue Mar 02, 2021 2:51 pm
- Forum: This is SolarChat !!
- Topic: halpha sun of March 1st
- Replies: 10
- Views: 102
Re: halpha sun of March 1st
Great solar images and very nice pic of the observing site Stephane
Brian

Brian
- Tue Mar 02, 2021 2:49 pm
- Forum: This is SolarChat !!
- Topic: halpha animation of the 1st of March
- Replies: 8
- Views: 82
Re: halpha animation of the 1st of March
Nice animation!!!
Brian
Brian
- Tue Mar 02, 2021 2:44 pm
- Forum: This is SolarChat !!
- Topic: Today's SUN (20210301) | SM90II - not just a paperweight
- Replies: 15
- Views: 223
Re: Today's SUN (20210301) | SM90II - not just a paperweight
Superb series of images Pedro
The 90/60mm DS looks very good...too bad the 90mm is limited to this use to get the best out of it. I'll bet it adds a lot of weight to the scope!
Brian

The 90/60mm DS looks very good...too bad the 90mm is limited to this use to get the best out of it. I'll bet it adds a lot of weight to the scope!
Brian
- Tue Mar 02, 2021 2:33 pm
- Forum: This is SolarChat !!
- Topic: Full disk 28-02-2021
- Replies: 8
- Views: 72
Re: Full disk 28-02-2021
Excellent FD images Rainer...well done
Brian

Brian
- Mon Mar 01, 2021 1:41 pm
- Forum: Sunlit Earth
- Topic: Moon, February 27th, 2021
- Replies: 8
- Views: 63
Re: Moon, February 27th, 2021
Great lunar mosaic Frank...well done
Brian

Brian
- Mon Mar 01, 2021 1:20 pm
- Forum: This is SolarChat !!
- Topic: AR2804 27-02-2021 H-alpha
- Replies: 8
- Views: 89
Re: AR2804 27-02-2021 H-alpha
Hi Richard... I use the Quantum infrequently, generally come out on days of very good seignior (by my standards) and there is some excellent details to image. The Lunt is just easier to use...the pressure tuner responds immediately where the Quantum takes time to heat to the base temperature then mo...
- Mon Mar 01, 2021 1:20 pm
- Forum: This is SolarChat !!
- Topic: Ordered Lunt 80mm, could use some advice!
- Replies: 30
- Views: 535
Re: Ordered Lunt 80mm, could use some advice!
Hi Andrew... The pattern has been documented by some and does not show for others, so it is a bit of a risk. It could be the effect of bad USB cables or ports which could answer part of the inconsistent responses seen. It has kept me form investing in one, though I'd like it for lunar work too. I ha...
- Sun Feb 28, 2021 1:22 pm
- Forum: This is SolarChat !!
- Topic: Some images with Solar Refractor 228mm
- Replies: 9
- Views: 106
Re: Some images with Solar Refractor 228mm
Incredible images Ale...well done
Brian

Brian
- Sun Feb 28, 2021 1:21 pm
- Forum: This is SolarChat !!
- Topic: AR2804 27-02-2021 H-alpha
- Replies: 8
- Views: 89
Re: AR2804 27-02-2021 H-alpha
Well done Richard!!!
Brian
Brian
- Sun Feb 28, 2021 1:20 pm
- Forum: This is SolarChat !!
- Topic: Sun 26.2. 150mm Mak
- Replies: 5
- Views: 85
Re: Sun 26.2. 150mm Mak
Hi Martin...
Nice set of images!!!
Brian
Nice set of images!!!
Brian
- Sun Feb 28, 2021 1:18 pm
- Forum: This is SolarChat !!
- Topic: White Light Herschel/Solar Wedges
- Replies: 32
- Views: 217
Re: White Light Herschel/Solar Wedges
Impressive collection of equipment Pedro
Brian

Brian
- Sun Feb 28, 2021 1:16 pm
- Forum: This is SolarChat !!
- Topic: Solar observation with two old (XIX/early XX century) refractors
- Replies: 18
- Views: 176
Re: Solar observation with two old (XIX/early XX century) refractors
Great post Pedro...the old refactors are a treat to see !!!
Brian
Brian