Search found 281 matches

by bart1805
Wed Oct 17, 2018 7:11 pm
Forum: Solar Astronomy Equipment Reviews
Topic: SolarQuest review
Replies: 21
Views: 693

Re: SolarQuest review

pedro wrote:
Wed Oct 17, 2018 3:26 pm
Bart: I guess you were referring to this add

https://www.astrobuysell.com/uk/propvie ... iew=142055
Sorry, you are right!
Thanks Pedro.
by bart1805
Tue Oct 16, 2018 9:56 pm
Forum: Solar Scope Modifications
Topic: How to double stack a Lunt CaK Module? And ERF?
Replies: 26
Views: 811

Re: How to double stack a Lunt CaK Module? And ERF?

Haha, thanks Bob :) Funny enough the past filters I ordered, 25mm filter, from Newport (KG3 filter) and it dropped right into a basic 1.25" filter cell and I just turned the ring inside it and it housed great. Worked right into everything truly simply. Just couldn't handle the heat because I was du...
by bart1805
Sun Oct 14, 2018 9:46 pm
Forum: Solar Scope Modifications
Topic: Dismantling and modification of a PST CaK
Replies: 15
Views: 319

Re: Dismantling and modification of a PST CaK

250 dollar for that 40 mm objective lens? That is quite a lot, did not know that. Have two of them, so maybe I will make a UV optimised bino with them. (-;
I found it typical that the #1 filter is glued to the retaining ring where the #2 filter is not. Any particular reason you know of?
by bart1805
Sun Oct 14, 2018 9:42 pm
Forum: This is SolarChat !!
Topic: Help Diagnose an SCT?
Replies: 24
Views: 399

Re: Help Diagnose an SCT?

Hi Marty, At the moment my 9 inch Maksutov is being tested and optimised. How good is it at different wavelengths for example and it is getting the perfect collimation. I allready know it is really good for visual. The optics are built into a carbon tube and isolated from the inside out with Armafle...
by bart1805
Sun Oct 14, 2018 8:55 pm
Forum: This is SolarChat !!
Topic: Help Diagnose an SCT?
Replies: 24
Views: 399

Re: Help Diagnose an SCT?

I wonder if you are really in focus with the SCT. I never managed to focus properly with a Meade SCT until the moment I started using a SCT focuser. The focus mechanism of the Intes I am using now is much better (no mirror shift at all), but still not good enough for AP. And something else. Why woul...
by bart1805
Sun Oct 14, 2018 7:17 pm
Forum: Solar Astronomy Shop and Swap
Topic: "Astronomie Solaire" - New (French) book on Solar Observation now available
Replies: 16
Views: 297

Re: "Astronomie Solaire" - New (French) book on Solar Observation now available

PDB wrote:
Sat Oct 13, 2018 7:01 am
Looks very good.
@Bart: maybe we should ask for a Dutch translation. ;)

@Christian: je voudrais bien commander, mais la seul methode de payement semble “PayPal”, que je ne veux pas utiliser … Dommage

Regards,

Paul
Goed idee Paul!
by bart1805
Sun Oct 14, 2018 5:52 pm
Forum: Solar Scope Modifications
Topic: Dismantling and modification of a PST CaK
Replies: 15
Views: 319

Re: Dismantling and modification of a PST CaK

Here you can see that the Lunt filter consists of two pieces:

Image20181014_190801_resized by bart moors, on Flickr
by bart1805
Sun Oct 14, 2018 1:54 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: What Whitelight Filter for a Meade 8" SCT?
Replies: 5
Views: 120

Re: What Whitelight Filter for a Meade 8" SCT?

For visual I would choose this one:
https://www.baader-planetarium.com/en/s ... _usage=459
You can also buy "sheets" of this filter and make your own holder.
by bart1805
Sun Oct 14, 2018 1:48 pm
Forum: Solar Astronomy Equipment Reviews
Topic: SolarQuest review
Replies: 21
Views: 693

Re: SolarQuest review

Came across this one, so it is not mine. Could save you some money if you are interested in the mount.
https://www.astrobuysell.com/uk/propview.php?view=14205
by bart1805
Sun Oct 14, 2018 1:43 pm
Forum: Solar Scope Modifications
Topic: Dismantling and modification of a PST CaK
Replies: 15
Views: 319

Re: Dismantling and modification of a PST CaK

Free at last! Good day today. First tried to dismantle the Lunt B600 diagonal. With a lens spanner it is really easy to twist the retaining ring of the BF: https://farm2.staticflickr.com/1967/30373657867_8228d69301.jpg 20181014_141955_resized by bart moors , on Flickr And there lies the square Lunt ...
by bart1805
Sun Oct 14, 2018 7:43 am
Forum: Solar Scope Modifications
Topic: PST CaK mod
Replies: 28
Views: 1989

Re: PST CaK mod

george9 wrote:
Sun Oct 14, 2018 2:06 am
I made cardboard rings to hold the PST elements within the larger 1.25 inch cells.
Thanks George! I was thinking about 3D printing some rings.
by bart1805
Sat Oct 13, 2018 2:47 pm
Forum: Solar Scope Modifications
Topic: Dismantling and modification of a PST CaK
Replies: 15
Views: 319

Re: Dismantling and modification of a PST CaK

I know Apollo, and I have tried it with a strap wrench. Have freed 2 PST etalons with it without major problems, but this one hates to be liberated. Here is the last light of the PST CaK. Could not get into focus, so removed the upper part of the eyepiece holder. Asi290mm with a single Baader CaK fi...
by bart1805
Sat Oct 13, 2018 12:25 pm
Forum: Solar Scope Modifications
Topic: Dismantling and modification of a PST CaK
Replies: 15
Views: 319

Re: Dismantling and modification of a PST CaK

Just wondering whether you could apply some heat arround filter n1 ? Maybe there is some glue ? Yes, that is another possibility, can't see the glue if I look in the tube, but most of the times it is somehow glued. Have got another gold tube of a PST lying around here, will check later if they are ...
by bart1805
Sat Oct 13, 2018 12:12 pm
Forum: Solar Scope Modifications
Topic: PST CaK mod
Replies: 28
Views: 1989

Re: PST CaK mod

I use a standard 1.25 inch filter cell for the PST elements. I've used some scavenged parts and the Skybender unit, but will be revising this in the near future with a custom made set of components. Hi Bob, I tried a Baader and a Astronomik 1,25 inch filter cell, they are both too big. I suppose I ...
by bart1805
Sat Oct 13, 2018 11:58 am
Forum: This is SolarChat !!
Topic: Winter project: CaK doublestack
Replies: 23
Views: 320

Re: Winter project: CaK doublestack

christian viladrich wrote:
Fri Oct 12, 2018 6:16 pm
Please share us with some images of the inside of the PST.
pedro wrote:
Fri Oct 12, 2018 7:25 pm
Like Christian I would like to see some images of the mod
Hi Christian and Pedro, here they are:
viewtopic.php?f=9&t=25213
by bart1805
Sat Oct 13, 2018 11:54 am
Forum: Solar Scope Modifications
Topic: Dismantling and modification of a PST CaK
Replies: 15
Views: 319

Dismantling and modification of a PST CaK

Here is the story of dismantling a PST CaK. In the end, the plan is to start spring with a doublestacked CaK filter. 1. The original PST CaK https://farm2.staticflickr.com/1932/45238583102_a70bfb40dc.jpg 20181012_183558_resized_1 by bart moors , on Flickr 2. Problem number 1, destroyed one of the sc...
by bart1805
Fri Oct 12, 2018 4:55 pm
Forum: This is SolarChat !!
Topic: Winter project: CaK doublestack
Replies: 23
Views: 320

Re: Winter project: CaK doublestack

Hi Pedro, First try of removing the tube or the blue collar failed. Then I removed the six screws so I could take a look inside. Destroyed one of the screws so had to drill that one out. Then you see the pentaprism and the #2 filter. I think I can get the retaining ring loose without removing the pe...
by bart1805
Fri Oct 12, 2018 12:28 pm
Forum: This is SolarChat !!
Topic: Winter project: CaK doublestack
Replies: 23
Views: 320

Re: Winter project: CaK doublestack

Hi Valery, I am, as everybody, a prisoner of a whole lot of things, but not of illusions I hope. (-;
I know what the limits are of this set-up.

Right now I am the prisoner of a dilemma: do I have to use force on the gold tube first or on the blue collar? Order does not it matter?
Any advice?
by bart1805
Fri Oct 12, 2018 7:22 am
Forum: This is SolarChat !!
Topic: Winter project: CaK doublestack
Replies: 23
Views: 320

Re: Winter project: CaK doublestack

Thanks guys. @Valery: Bob made some comparisons between single and doublestack CaK with smaller scopes. I like the doublestack images more than the single stack. I know I would have to go bigger in the end. But first let me master this with a relatively small telescope (150mm f/8 Skywatcher). For pl...
by bart1805
Fri Oct 12, 2018 7:11 am
Forum: This is SolarChat !!
Topic: Help Diagnose an SCT?
Replies: 24
Views: 399

Re: Help Diagnose an SCT?

It is not possible to judge a scope by just looking at some pictures of planets and the moon. How good are your processing skills at planetary for example? It is sometimes completely different compared to solar processing. How good is the scope visual? I use a 7 inch Intes M703 and a 9 inch Maksutov...
by bart1805
Thu Oct 11, 2018 8:16 pm
Forum: Solar Scope Modifications
Topic: Narrowest 393.37 ever by Apollo Lasky
Replies: 205
Views: 6136

Re: Narrowest 393.37 ever by Apollo Lasky

Found this information about a UV-Barlow lens.
https://www.astrosystems.nl/uv-barlow-
by bart1805
Thu Oct 11, 2018 8:13 pm
Forum: This is SolarChat !!
Topic: Winter project: CaK doublestack
Replies: 23
Views: 320

Winter project: CaK doublestack

Hi all, A couple of months ago I bought a Lunt 60 CaK with a B600 diagonal. The scope is living with Pedro now. The filter is still here. I like the difficulties of CaK imaging and was tempted when Apollo posted about the Chroma Filters. But the new prices Bob mentioned meant that this road came to ...
by bart1805
Thu Oct 11, 2018 7:32 pm
Forum: Solar Astronomy Shop and Swap
Topic: "Astronomie Solaire" - New (French) book on Solar Observation now available
Replies: 16
Views: 297

Re: "Astronomie Solaire" - New (French) book on Solar Observation now available

Congratulations Christian, looks spectacular! Will wait for the English version.
by bart1805
Thu Oct 11, 2018 7:18 am
Forum: This is SolarChat !!
Topic: A very special prom on Oct 10
Replies: 27
Views: 411

Re: A very special prom on Oct 10

Baader 35nm works really well. I have one on the nosepiece of the etalon to protect everything else in the train from the heat the D-Erf let's through.
Beautiful pictures Lou!