Search found 61 matches

by solarchatted
Sun Jul 21, 2019 1:44 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

[/quote] The use of the Meade 4000 filter still concerns me. It's an absorptive filter, it will crack at some point! [/quote] Thanks for the info ... and regarding the RED filter, I only meant within this mod - i.e. the PST tube is in front of it - the IR/UV + RED is fit on the 35mm extension after ...
by solarchatted
Sun Jul 21, 2019 1:37 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

This is my latest PST-SCT v2 - it is better, unfortunately no good weather today!
by solarchatted
Sun Jul 21, 2019 10:44 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

Hi I am back to something that works ... I keep it on this thread as it has been gathering info to help others too. This morning I set-up for re-testing my SCT mod and it works great - actually better [etalon seems better after I removed lenses once and put them back without doing anything - weird!]...
by solarchatted
Mon Jul 15, 2019 11:52 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

The front AOK adaptor is just a means of mounting the PST etalon to the donor scope. The rear adaptor will need addition spacers to bring the the final focus to a position 200mm behind the PST etalon assembly. OK, thanks. In the meantime -after wasting 3 hours trying to find the PST gold tube - [it...
by solarchatted
Sun Jul 14, 2019 2:48 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

One thing I am not sure [regarding donor scopes]. If I get a F10 and cut it, do I still use the Etalon unit with AOK adaptors + original PST eyepiece holder as I did or not? See previous image I am guessing all I need is to set the Etalon unit [with its lenses] ~200mm in-focus - which I guess it is ...
by solarchatted
Sun Jul 14, 2019 2:43 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

Well, what an informative and helpful forum. You are really great guys. So much work for this and I am back thinking that my easiest bet is a good Donor scope then, like the afore-mentioned Bresser Messier AR-90/900 OTA [far less expensive] or Bresser Messier AR-102/1000 Hex-Focus [2" focuser better...
by solarchatted
Sun Jul 14, 2019 2:33 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

Hi, DO NOT use absorbtive colour filters as ERFs AFTER an objective as they absorb heat. They are only safe mounted in front of an objective. Dielectric filters are safer after an objective as they reflect most of the energy they are not designed to let through... agenaastro.com/blue-fireball-m48-m...
by solarchatted
Sat Jul 13, 2019 2:14 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

As well as the above important comment from Mark, remember you don’t need a focuser in front of the PST etalon. Once the etalon is correctly positioned at the -200mm in front of the prime focus it should not be moved. Any focusing behind the etalon to accommodate the eyepiece/ camera can be achieve...
by solarchatted
Sat Jul 13, 2019 2:03 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

Meade 4000 RED #25 Whhhhooooaaaaaaa!!!! DANGEROUS! This is absorptive filter, not dielectric. Stop using it, and don't use the PST mod until you have proper filtration / ERFs. This filter WILL crack and given you are using visually worries more. I checked and it does not heat up much, it is slightl...
by solarchatted
Sat Jul 13, 2019 2:00 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

Starry Jack wrote:
Wed Jul 10, 2019 4:45 pm
What make is your AR152?
The original Explorer Scientific - not the other versions that usually have a different focuser attachment - if I am not wrong.
by solarchatted
Wed Jul 10, 2019 3:48 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

Hi again Just to keep updated - for others too, that have no previous knowledge/studied Optics and need help understanding. Yes, it is the obvious ... the Etalon was off ... I managed to push-fit Etalon/Tuner [including AOK Swiss adaptor with 2" IR/UV + Meade 4000 RED #25 Filter at the end of the fo...
by solarchatted
Tue Jul 09, 2019 8:02 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

Hi both of you thank you for your time. Yes, I got it now! I am back to ... I cannot make or have a friend that can make me a flange to replace current one on AR152, so I can fit focuser 'possibly' 100mm more inwards. It looks like it is time to save for a Lathe - second hand and make ALL adaptors m...
by solarchatted
Sat Jul 06, 2019 5:19 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

UPDATE Today I managed to have an hour or so, to do some more Visual tests - Sky was clear enough for ab bit. For what I gathered: Problem 1 - Focusing I added my 35mm Revelation 2" extension [to the setup in above image - before the Etalon] and it did focus a bit better with focuser about 12mm out...
by solarchatted
Fri Jul 05, 2019 3:40 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

Here is an image I tried various distances for PST eyepiece holder and front 2" Tuner adaptor. The focusing was around 31mm focuser out - going further back or forward was going out of focus. The focus was not 'clearly' totally in focus ... I am pleased I do not need to get lenses out of Etalon, the...
by solarchatted
Wed Jul 03, 2019 5:31 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

ADDITION: while having dinner and talking with my wife, I just remembered one 'possibly important thing - in my case' ... do I have to take the lens/lenses OFF the Tuner? If so, tomorrow I will get a couple of plastic sealed bags from workshop and at night take them off and mark with pencil which o...
by solarchatted
Wed Jun 19, 2019 3:12 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

At present, I have already dismounted all parts and already done a SCT focuser Mod and it is very nice, but with a 'wobble' PST eyepiece into an adaptor. See this post: https://solarchatforum.com/viewtopic.php?t=26069#p235640 I am waiting for AOK Swiss adaptors posted yesterday and then I will play ...
by solarchatted
Wed Jun 19, 2019 2:54 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

BOLDED answers ... to help anybody else reading. Hi I am in the process of doing the same PST 'Combat'. Now I have a new ITF, things are 'clear' ! What I wish to do is the obvious mod to use PST as a Quark and use it on various scopes, including my AR152 F/6.5 My 'practical' questions: 1. Do I need...
by solarchatted
Wed Jun 19, 2019 2:50 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

Hi
Just noticed your reply.

I thought it was not a reply ... there is no bold or italic to discern my typing to yours.

I will copy it it and do it, then I will see your answers clearly.

Thanks
M
by solarchatted
Fri Jun 14, 2019 8:30 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 44
Views: 1052

Re: Planning my first PST mod and need some help

I am 'slowly' getting along [time permitting] to understand 'the works' by testing and already the SCT focuser mod is better than PST standard setting - even using bath-tub splash-proof insulators as spacers within 1.25" adaptor to hold PST eyepiece holder! :P With SCT focuser I already got rid of t...
by solarchatted
Sun Jun 09, 2019 3:24 pm
Forum: Solar Scope Modifications
Topic: Improvements to your PST!
Replies: 6
Views: 842

Re: Improvements to your PST!

Got other one but only managed to check it out quickly - did not have time + weather rubbish and this one 'seems' to work.
Next time I have steadier weather, I will test it properly. I am no expert of optics, but as I understand it is to do with 2x2 FL and this one seems to mach PST better.
by solarchatted
Mon May 27, 2019 2:31 pm
Forum: Solar Scope Modifications
Topic: Improvements to your PST!
Replies: 6
Views: 842

Re: Improvements to your PST!

... and the reason I had problems might be its focal length!
I ordered another one, let's see what happens ... if no results, it means I wasted a total of £. 50!
Pffff !
by solarchatted
Sun May 26, 2019 3:59 pm
Forum: Solar Scope Modifications
Topic: PST Stage 1 + AR152, AR102, 72ED etc. next steps ...
Replies: 13
Views: 513

Re: PST Stage 1 + AR152, AR102, 72ED etc. next steps ...

I am now really tempted to get the Bresser Messier AR-90/900 OTA - I am not sure if I need to cut it or will work as is!
by solarchatted
Sun May 26, 2019 3:50 pm
Forum: Solar Scope Modifications
Topic: PST Stage 1 + AR152, AR102, 72ED etc. next steps ...
Replies: 13
Views: 513

Re: PST Stage 1 + AR152, AR102, 72ED etc. next steps ...

Here is one of the images I managed to take with SCT focuser one and wobbly nosepiece holder - nothing special, also a lot hazy. But surface I believe it is clearer! I 'think' this was with a 2x Barlow (with also 2x Barlow lens end screwed onto camera) - not sure ... https://astronomo.space/my-image...
by solarchatted
Sun May 26, 2019 9:12 am
Forum: Solar Scope Modifications
Topic: Improvements to your PST!
Replies: 6
Views: 842

Re: Improvements to your PST!

I tried a 2x2 [used on a Canon camera] and I cannot focus. Tried everything within my knowledge to focus. I just cannot. Last week I also managed to attach a SCT 10:1 focuser [https://solarchatforum.com/viewtopic.php?t=26069#p235640] I rarely used, in place of the PST one and it is very good - view ...
by solarchatted
Sat May 25, 2019 4:35 pm
Forum: Solar Scope Modifications
Topic: PST Stage 1 + AR152, AR102, 72ED etc. next steps ...
Replies: 13
Views: 513

Re: PST Stage 1 + AR152, AR102, 72ED etc. next steps ...

I forgot to ask something: 1. The Bresser Messier AR-90/900 OTA Optical Tube Assembly https://www.telescopehouse.com/telescopes/telescopes-by-brand/brand-bresser-telescopes/bresser-messier-ar-90-900-ota-optical-tube-assembly.html , do I need to adjust tube length or not? 2. Do I still have to take l...