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Transit of Mercury in the Spicule Layer. Phil took this great image with his Quantum 6 Scope, Solar Spectrum etalon and PGR Camera.

Welcome to Solar Chat! The best forum for Solar Astronomy
Moving forward from solar cycle 24 to 25

Search found 90 matches

by solarchatted
Sun Oct 06, 2019 2:03 pm
Forum: This is SolarChat !!
Topic: Lovely big prom today | Sept 15th 2019
Replies: 17
Views: 448

Re: Lovely big prom today | Sept 15th 2019

[/quote][/i] ... But again, at the end of the day, real world results, the 290 is more sensitive than the IMX178 and there's no need to bin and then use a barlow to get the sampling right with the focal-ratio. So I sold my IMX178 after using these three sensors. If I get another large small pixel se...
by solarchatted
Sun Sep 22, 2019 12:27 pm
Forum: This is SolarChat !!
Topic: Lovely big prom today | Sept 15th 2019
Replies: 17
Views: 448

Re: Lovely big prom today | Sept 15th 2019

I have checked out the 290M too sometime ago and I am guessing it really matches your setup. I moved over to the 290 from the IMX178 sensor for small pixel work,... Very best, Thank you for confirming it. I have been meaning to get a 290M for years, not just for solar - even thou I am no expert I a...
by solarchatted
Wed Sep 18, 2019 10:32 am
Forum: This is SolarChat !!
Topic: Lovely big prom today | Sept 15th 2019
Replies: 17
Views: 448

Re: Lovely big prom today | Sept 15th 2019

Lovely details!
I have checked out the 290M too sometime ago and I am guessing it really matches your setup.
by solarchatted
Wed Sep 18, 2019 10:30 am
Forum: This is SolarChat !!
Topic: Sol from the 15th of September 2019.
Replies: 12
Views: 309

Re: Sol from the 15th of September 2019.

Beautiful details!
by solarchatted
Wed Sep 18, 2019 10:28 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Tilt adaptor would be better of course, but at present it seems that simply raising gain to over shine camera, then tilt the PST eyepiece holder with the 3 thumbscrew modified Chinese 1.25" to 2" adaptor does the job. I tried last time at the end of my learning session and it did clear the whole ima...
by solarchatted
Sun Sep 08, 2019 9:35 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Strangely enough, my home made PST eyepiece adaptor can be use as a tilt adjuster! Having modified the Chinese 2" to 1.25" adaptor - taken out the internal metal ring and drilled another hole/threaded and replaced thumbscrews with nylon ones at 120° I can now just tilt the needed side and get rid on...
by solarchatted
Wed Sep 04, 2019 4:37 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Thanks for the useful inputs - I like to learn and I agree, there is no difference in going to small using ROI - at least with my camera set Binning to get to 4.8µm - the 178M is quite efficient/reactive to light at I believe 75% QE. This morning I had a quick section, knowing it would cloudy up and...
by solarchatted
Mon Aug 26, 2019 3:07 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

1. I am now wondering which camera will be best with my setup - best as in pixel matching camera lenses: 174M 290M 178M [mine] or what? 2. which Barlow ? Just the Expensive PowerMate x2.5 ? I see that the cheap Chinese x5 Barlow I used nearly did the job [metal one, not plastic] 3. Filters? I tried...
by solarchatted
Sun Aug 25, 2019 5:17 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

1. I noticed a bit of a shine on top right of image - the next in particular. 2. would a tiny 40mm fan create too much turbulence - to fit on top of the tube in between front lenses and D-ERF ? They are separate at about 20cm, maybe a little more Maybe the D-ERF is shining to the back of the front l...
by solarchatted
Sun Aug 25, 2019 3:25 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

This is not exactly a great image - I actually managed to achieve something very similar just with the PST! Taken this morning using AR90/900 with AR102 focuser + PST SCT mod [see other posts] + D-ERF [kindly sold to me by marktownley] Binning 2x - Altair 178M [if necessary, a 174M -I cannot afford ...
by solarchatted
Sat Aug 24, 2019 11:26 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

By the way, I have finally managed to test live with The Sun still in between clouds! It works and I must say, I should have cut it less than the 22cm I did [after I measured], while initially I wanted to cut 15.5-16cm - I was right! I had to add about 6-7cm extension! In other words when I calculat...
by solarchatted
Sat Aug 24, 2019 11:19 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Will drill holes, good idea of course and get hot currents off the chamber in between lenses and D-ERF - thanks!
by solarchatted
Wed Aug 21, 2019 10:23 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

I have dismounted the lenses and focuser to prepare for cutting. The D-ERF filter fits nicely just behind the front lenses as there is a step after the step where lenses sit - so 90mm lenses and 70mm D-ERF view. I will try that first and see what happens - if it masks too much, after I cut the tube....
by solarchatted
Sun Aug 18, 2019 4:20 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Hi all Today I stepped up again. I had the brilliant idea of using my AR102ST focuser onto the AR90-900 and replace the awful plastic 1.25" focuser with a metal properly made one and 2" - although it only has 45mm focus adjustment and I had to add 35mm extension to focus - original focuser tube is v...
by solarchatted
Sat Aug 10, 2019 4:31 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Well ... I will test lenses properly when I get the time, the weather and the Moon or stars and also measure its focus using the AR90/900 with its own focuser from the end of the tube to edge of camera 178M - to avoid mistakes - the 178M has about 10-12mm inside to reach CMOS - not much. Going back ...
by solarchatted
Sat Aug 10, 2019 2:54 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Mine is fit like this: https://en.wikipedia.org/wiki/File:Lens6b-en.svg But upon checking it now, the front seems to NOT be equal on both sides! I cannot check right now as I had to clear table, but possibly tomorrow morning. Is it possible front lens is not convex equally on this telescope? MAuro
by solarchatted
Wed Aug 07, 2019 1:50 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

I guessed I was too near! I do not know how to calculate minimum distance for focusing, but I went outside picking something more distant and focus went better, then I picked up nearest hill - a few hundreds metres away and it does focus. I also discovered what an amount of rubbish these lenses are!...
by solarchatted
Wed Aug 07, 2019 1:33 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

I recently [ after I did take those images] removed the front lenses to make sure there was a internal ring near the front and there is one and the 75mm [80mm] ERF should fit fine. My problem is, i am not 100% sure I re-fit the front lenses correctly, even thou I did place them on a clean surface al...
by solarchatted
Sun Jul 28, 2019 3:01 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

When I mentioned to replace the BF within the PST original 6mm [mine is I think], I believe I read somewhere a long time ago, someone else drilling the 6mm hole to 10mm or so and replace filter. Do you mean this Andover? https://www.andovercorp.com/ The filter is actually 171$ today. Thanks for your...
by solarchatted
Sat Jul 27, 2019 8:56 am
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Heya. I would make sure the ERF is as high up the tube as possible so it intercepts as much of the exit beam from the objective as possible. Aim more like 2/3 up the tube. The -200mm is so important, I get you're just trying stuff but fundamentally just aim for -200mm in the first place. Just measu...
by solarchatted
Fri Jul 26, 2019 2:18 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Next will be the ERF [maybe 2nd 3rd week of August] - probably the 75mm [80mm] Lunt and fit inside at about 28.5cm from edge of tube - focuser side. I am getting some 80mm O-rings and already made a nylon pressed-in plate to hold the ERF in place over the internal original telescope metal plate with...
by solarchatted
Fri Jul 26, 2019 2:06 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Merlin66 wrote:
Fri Jul 26, 2019 8:24 am
Please,please, listen to the experienced advice your are being given.
Your safety and that of others following this thread is paramount.
We do not support any unsafe modding of the PST or any other commercial solar scope.
Agreed.
by solarchatted
Thu Jul 25, 2019 4:00 pm
Forum: Solar Scope Modifications
Topic: Planning my first PST mod and need some help
Replies: 84
Views: 3762

Re: Planning my first PST mod and need some help

Hi The AR90 looks a good choice as available new. I never came across it when looking for a OTA. I would first use it with the 2" UV-IR placed up the tube where its just under fully illuminated. Andrew I usually have 2" UV/IR fit onto the AOK adaptor ~5cm before the Etalon + RED [I know, can be dan...