Search found 215 matches

by RodAstro
Fri Nov 13, 2020 11:38 pm
Forum: Solar Scope Modifications
Topic: Solar Scout SS60 Etalon on 80ED scope: first light
Replies: 4
Views: 292

Re: Solar Scout SS60 Etalon on 80ED scope: first light

Hi Fabio Yep the focuser is pretty poor, the helical focusing should have been right up at the front where the lens is, if they had to use that method at all. My first ss60 had to go back one reason was because of the focuser, it was machined bent so the suns image went around the field in a very wi...
by RodAstro
Fri Nov 13, 2020 5:56 pm
Forum: Solar Scope Modifications
Topic: Solar Scout SS60 Etalon on 80ED scope: first light
Replies: 4
Views: 292

Re: Solar Scout SS60 Etalon on 80ED scope: first light

Hi Fabio Nice job and a good first image I haven't seen ar2781 since it first came onto the disk, so cloudy here in the UK. I have been using my SS60 quark etalon unit on my 6" refractor for the past 18 months and it is superb. Over winter my observatory is to low for the sun so I take mine out on m...
by RodAstro
Fri Nov 13, 2020 3:20 pm
Forum: Solar Scope Modifications
Topic: Newtonian vs SCT thermal handling with full aperture D-ERF
Replies: 27
Views: 9149

Re: Newtonian vs SCT thermal handling with full aperture D-ERF

Hi Marty As Andrew says some AR coatings are restrictive ether end of the visual scale but this is normally done on refractors to make them appear better than they are, that goes for archos, EDs and triplets. I am not sure if celestron would be doing that on the Edge because the blue end of the scal...
by RodAstro
Thu Oct 15, 2020 2:23 pm
Forum: This is SolarChat !!
Topic: AR2776 Spots 15-10-20
Replies: 3
Views: 147

AR2776 Spots 15-10-20

Hi
A soft capture of AR2776 I only got 5 seconds between clouds.
Showing some development with small spots, maybe one to watch.

Rod

6" refractor and Quark
by RodAstro
Wed Oct 14, 2020 5:51 pm
Forum: Solar Scope Modifications
Topic: Basic question about PST etalon to focus spacing.
Replies: 39
Views: 928

Re: Basic question about PST etalon to focus spacing.

Hi

I Just realised I have said what Mark said previously much further up in the tread, but hadn't quite got it in my head yet sorry Mark.

Cheers
by RodAstro
Wed Oct 14, 2020 5:11 pm
Forum: Solar Scope Modifications
Topic: Basic question about PST etalon to focus spacing.
Replies: 39
Views: 928

Re: Basic question about PST etalon to focus spacing.

Hi
Alexandra have a read of the third paragraph in my previous post, from what Merlin said and it makes sense this should be the easiest way to get everything in the correct position on your C11,

I hope I am correct anyone please correct me if I got it wrong.

Cheers Rod
by RodAstro
Wed Oct 14, 2020 5:06 pm
Forum: Solar Scope Modifications
Topic: Basic question about PST etalon to focus spacing.
Replies: 39
Views: 928

Re: Basic question about PST etalon to focus spacing.

Hi Merlin yes that is so obvious now I think of it that way around (backwards) nice explanation many thanks, so I could use a PST mod to get my SCT to exactly f10 for star measurements COOL. I know this was not the original point of the thread as Rusted's scope is f10 but I was thinking of Alexandra...
by RodAstro
Tue Oct 13, 2020 8:06 pm
Forum: Solar Scope Modifications
Topic: Basic question about PST etalon to focus spacing.
Replies: 39
Views: 928

Re: Basic question about PST etalon to focus spacing.

Hi Yep Mark after some reading it seems quite hard to find an easy answer to this but from what I can find, is it may be reasonable to assume that the centre of focus travel may be the actual point where the optical system is at a true f10, as either side of the f10 design the optics incur spherical...
by RodAstro
Tue Oct 13, 2020 4:15 pm
Forum: Solar Scope Modifications
Topic: Basic question about PST etalon to focus spacing.
Replies: 39
Views: 928

Re: Basic question about PST etalon to focus spacing.

Hi Mark Just one question to confuse everyone, how would you work out the position of the SCT primary mirror, as its position changes the focal ratio of a SCT so wouldn't the 200mm in focus change? Also after a certain point of in focus most SCTs secondary mirrors start to stop the primary down and ...
by RodAstro
Fri Oct 02, 2020 11:53 am
Forum: This is SolarChat !!
Topic: Full MOON (20200930) | Lichtenknecker 500mm F/3.5 Flat Field Camera
Replies: 11
Views: 329

Re: Full MOON (20200930) | Lichtenknecker 500mm F/3.5 Flat Field Camera

Hi Pedro

It would be nice to see what yours can do with a full frame camera on the back. Loverly super fast wide field camera.

The consensus at St Andrews was that anything bigger than 37" and the corrector would not be able to support itself sufficiently to keep its figure.

Rod
by RodAstro
Fri Oct 02, 2020 12:18 am
Forum: This is SolarChat !!
Topic: Nice filament 1/10/20
Replies: 11
Views: 324

Re: Nice filament 1/10/20

Thanks James
Yep it was changing all the time although very subtle

Rod
by RodAstro
Fri Oct 02, 2020 12:13 am
Forum: This is SolarChat !!
Topic: Full MOON (20200930) | Lichtenknecker 500mm F/3.5 Flat Field Camera
Replies: 11
Views: 329

Re: Full MOON (20200930) | Lichtenknecker 500mm F/3.5 Flat Field Camera

Hi Pedro A lovely image taken by a very nice scope. I drove the 200 miles last year to St Andrews university where my Zeiss coude came from, to have a personal tour of the observatories. I was also going to have an observing evening with the 37" schmidt cassegrain the largest operational telescope i...
by RodAstro
Thu Oct 01, 2020 11:27 pm
Forum: This is SolarChat !!
Topic: Nice filament 1/10/20
Replies: 11
Views: 324

Nice filament 1/10/20

Hi AR 12773 has been a little bit of an anticlimax and weather has got in the way of some good imaging through the week but today as it approaches the limb I caught a nice filament. Lots of thick clouds but nice and clear, stable air after rain just enough to get the capture. Rod Zeiss 6" coude, Qua...
by RodAstro
Tue Sep 22, 2020 3:10 pm
Forum: This is SolarChat !!
Topic: AR 22-09-20 WL Ha
Replies: 6
Views: 176

Re: AR 22-09-20 WL Ha

Hi Dan
Yep the spots are much darker visually

Rod
by RodAstro
Tue Sep 22, 2020 2:39 pm
Forum: This is SolarChat !!
Topic: Tuesday 22nd September - NO SUN-SPOT(S) AT PRESENT
Replies: 5
Views: 160

Re: Tuesday 22nd September - NO SUN-SPOT(S) AT PRESENT

Hi Terry

A couple of small spots have developed, one at first then a second a bit later on just after dinner.

Rod
by RodAstro
Tue Sep 22, 2020 2:33 pm
Forum: This is SolarChat !!
Topic: 22.10.2020 Bit disappointing.
Replies: 12
Views: 243

Re: 22.10.2020 Bit disappointing.

Nice images

may get better as it goes along, the prom changed constantly yesterday.
Two small spots have arrived in white light though, none early on.

Rod
by RodAstro
Tue Sep 22, 2020 2:29 pm
Forum: This is SolarChat !!
Topic: AR 22-09-20 WL Ha
Replies: 6
Views: 176

AR 22-09-20 WL Ha

Hi A bit better seeing today even though it was mid day, may get another go later and see if anything has changed. Two small spots easily visible in white light at around 100x magnification. A nice deep hole seen in Ha while it is near the limb. I used a Zeiss full aperture glass photographic solar ...
by RodAstro
Tue Sep 22, 2020 10:56 am
Forum: This is SolarChat !!
Topic: New AR today
Replies: 9
Views: 289

Re: New AR today

Thanks all Looking at GONG this morning the activity seems to have moved slightly so we maybe in for a decent bit of activity as at the moment the area of activity is quite large, I hope so. Valery I used my 6" Zeiss f15 with a Quark unit off a daystar ds60 with a UV/IR filter. I have to use a reduc...
by RodAstro
Mon Sep 21, 2020 8:27 pm
Forum: This is SolarChat !!
Topic: New AR today
Replies: 9
Views: 289

New AR today

This is the best I could get as the seeing was boiling and a very hazy sky, can't half tell the planes are back now it's getting cooler. There was lots of movement in the prom changing every minute and very bright features. Nice big loop as well. Looks like it is going to get interesting for a while...
by RodAstro
Fri Sep 18, 2020 4:36 pm
Forum: This is SolarChat !!
Topic: TV Pronto 70mm F/6.8 (480mm) ED Grab & Go Solar Scope
Replies: 14
Views: 416

Re: TV Pronto 70mm F/6.8 (480mm) Grab & Go Solar Scope

Hi Pedro

Your telescope museum is coming along nicely :D
That's a lovely scope I had my best view of the veil nebula through one of these with a OIII filter many years ago.

By the way your water tower is just begging to be turned into a solar tower observatory, now that would be nice :P
by RodAstro
Thu Sep 10, 2020 6:51 pm
Forum: This is SolarChat !!
Topic: How much pressure is in a pressure tuned etalon? And more
Replies: 16
Views: 399

Re: How much pressure is in a pressure tuned etalon? And more

Hi Bruce It seems to me the simplest and cheapest solution, would be to remove the existing pressure tuner and have it on a remote flexible pipe. With the unit attached to a machined fitting that you could get hold of with one hand whilst turning the outer housing with the other hand it would be muc...
by RodAstro
Sun Aug 16, 2020 9:01 am
Forum: This is SolarChat !!
Topic: H-alpha full disk 13-08-2020 and Big Prominences
Replies: 4
Views: 206

Re: H-alpha full disk 13-08-2020 and Big Prominences

Hi
Nice disk with fantastic processing, love the colour.

Rod
by RodAstro
Sun Aug 16, 2020 9:01 am
Forum: SPoD Archive
Topic: H-alpha full disk 13-08-2020 and Big Prominences
Replies: 2
Views: 142

Re: H-alpha full disk 13-08-2020 and Big Prominences

Hi
Nice disk with fantastic processing, love the colour.

Rod
by RodAstro
Wed Aug 12, 2020 9:46 pm
Forum: This is SolarChat !!
Topic: AR12770 at last
Replies: 9
Views: 293

Re: AR12770 at last

Thanks all it's nice to be getting some decent images again, I could do with sharper skies though.

Cheers Rod
by RodAstro
Wed Aug 12, 2020 9:46 pm
Forum: SPoD Archive
Topic: AR12770 at last
Replies: 7
Views: 241

Re: AR12770 at last

Thanks all it's nice to be getting some decent images again, I could do with sharper skies though.

Cheers Rod