Santel M180 F10 Rumak Maksutov first light

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Re: Santel M180 F10 Rumak Maksutov first light

Post by marktownley » Thu Apr 16, 2020 6:29 am

Interesting, I can tell you a little history about your Quark.

It is a matched 'twin' to mine; way back in 2014 the idea was set up to do 'the worlds largest solar image', this was to take place at the Hertsmonceaux Astronomy festival in the september that year. The Quarks hadn't long been out and Daystar sponsored the event along with Rupert Smith from Astrograph. There was myself, Gary Palmer, Steve Collingwood and Pete Lawrence (S@N) involved too. Daystar supplied 4 matched quarks (as uniformity was key) - 2 chromosphere models and 2 prominence models. After the event I bought one of the chromosphere models and Gary Palmer had the other, not sure where the 2 prom quarks ended up. I've kept hold of mine, Gary had his for a couple of years and it was reviewed for S@N, then it was sold on, I think I clocked it came up for sale on FB where you bought it? Anyway, its a very good Quark, seriously keep hold of it made with PE grade mica. Anyhooo, some pictures...
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Setting up.
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More setting up...
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Gary and Pete imaging...
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The team, L to R, Steve, Gary, Pete, Rupert, Me

Oh, and the world record image - it went cloudy :D :D :D


Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Re: Santel M180 F10 Rumak Maksutov first light

Post by AndiesHandyHandies » Thu Apr 16, 2020 9:20 am

Hi

I did buy it off Facebook. Lucky happenstance I noticed the Ad.

Fortunately another one on Facebook I said I would buy when a guy came back from holiday fell through, though it had good images posted.

I need to lock it away then.

By happenstance my matching MN78 appeared on Sky at Night for a Venus transit, Jamie? Cooper.

Thanks. Andrew.



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Re: Santel M180 F10 Rumak Maksutov first light

Post by AndiesHandyHandies » Sat Apr 18, 2020 8:24 am

Hi,

Thursday I was out.

I have been asking on CN for eyepiece advice for a 18mm as I ought to be able to get more magnification out of the M180.

I then realised I had not remove a 2.5x GPC from the Baader T2 diagonal so I was negating the Macro lens reduction.

I had to go to another 49mm macro lens with 49-48 adapters on both end in an extension tube chain just outside the focusser to get a reduced image. Not sure about quality yet.

I seem to be seeing what definite proms which are there with the Quark. But flat in terms of contrast but small aperture.

Unfortunately some bugs got in the diagonal and died on the back of the prism and as they are acidic Rod says etched a spot right near the middle. Bright spray of light. I wonder if a claim would work? As its sealed how would one get in after it was made?

Cheers. Andrew.



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Re: Santel M180 F10 Rumak Maksutov first light

Post by marktownley » Sat Apr 18, 2020 8:32 am

Does it have to be 18mm? Astroboot has a few options at 20mm. https://www.astroboot.co.uk/AstroBoot/t ... eedle=1.25

Not good about the bugs!


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Re: Santel M180 F10 Rumak Maksutov first light

Post by AndiesHandyHandies » Sun Apr 19, 2020 9:15 am

Hi

AstroRod sourced me a simple binoviewer with 50mm simple eyepieces.
He said that his Zeiss binoviewer has tilting issues on solar as I recall.
I have to take the 2" nose piece off the Carl Zeiss research (Big Maxbright) he modded to 1.25" for me and put it on the simple binoviewer.

On CN people said binoviewing is best on solar.

See how they work.

I can try the 90mm Quark reducer set up on the M180 as it is, as I am then near to F30. F7 x 4.2.
Compare PST Mod2 with the Quark for visual.
From Valerys post about his imaging setup using the M180 at native Fno should be good.

Rod is getting better images with his Zeiss reduced to F7.5 ish than the donor 60DS native mode. Not surprisingly.

Andrew.



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Re: Santel M180 F10 Rumak Maksutov first light

Post by AndiesHandyHandies » Tue Apr 21, 2020 6:44 pm

Hi,

Yesterday I tried the small rectangular 45Deg 23.2mm bino viewers AstroRod modified to 2" for me.

In the M180 the 5x showed the whole Sun with the one prom visible, nice and sharp. With the 16x perhaps a bit too much.
The surface mottling seemed better. And the background a bit darker.
I have ordered a pair of 10x / 18mm from China, which was the higher magnification I wanted to try.
So I am a convert to binos for the Sun.

Tried on the VMC110. Darker background and just the one PST reflection over the image.

Tried on the 90mm F6.7 triplet and very dark background. With the 5x the second PST etalon reflection far out to the edge.
Moving the Sun to the edge of field the first PST reflection was visible but faint and even.

Maybe the Corrector on the M180 is responsible for some back refections. And not baffled yet like the VMC110.

Christian says in his website the etalon needs to be square on and many are not. And to use auto-collimation from the front to check.
I used this method to collimate my 6" F5 Celestron/Vixen. And standing across the road up the hill for AstroRods 6" F15.

I have recently purchased SH M48 and T2 tilters off ABS.
I can put the M48 one before the PST to make the etalon orthoganol to the light. But backfocus on the VMC110 would be an issue.
I had a quick look at getting the T2 after the PST in my bino set up but not an obvious way, to line up the sweet-spot.

Windy today so did some voluntary gardening at our local church community garden.

A few clear days for playing about.

Andrew.



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Re: Santel M180 F10 Rumak Maksutov first light

Post by AndiesHandyHandies » Wed Apr 22, 2020 5:36 pm

Hi

Today I went out with the 127mm Meade Triplet and a SH 48mm to T2 tilter off ABS.

I noticed a comment in Christians website commenting on the etalon needing to be orthogonal to the light path.

I punched a hole in an old Xmas card and drew a 1/4" wide V away from it I could see it from 20 feet away.

Looking through the hole at the objective lens I assessed where the reflection of the centre of the V was, and also as moved up and down and left to right to the edge of field and judged how much black left.

After a few tries getting use to the tipper I decided it was good enough.

Now I can see proms in the middle of the field, not finding the best bit of a circle of on-band.
And across nearly half of the field as you would expect for 950mm fl.

The only downside is I probably will not have enough back-focus in the VMC110.

So a good days work.

Andrew



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Re: Santel M180 F10 Rumak Maksutov first light

Post by AndiesHandyHandies » Thu May 14, 2020 6:18 pm

Hi

I received the two 10x Chinese microscope eyepieces for the 45Deg microscope bino-viewers AstroRod modified to have a 2" nosepiece..

These give me the same magnification as my 25mm Clave' Plossl.

I had a good view of the large hedge prom today. Looked much like Stefis image.

The input aperture is 19mm and my focal plane image 18mm.

It seems to reduce background light by the Suns edge. I only have to rotate for the PST etalon main reflection.

The best improvement is seeing the surface detail. Rather than scanning to catch it its there in the static view.

I asked on CN about a possible 18mm for a bit more magnification but the consensus was bino-viewing was better and they are right.

A good day.

Thanks to Rod.

Cheers. Andrew.



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Re: Santel M180 F10 Rumak Maksutov first light

Post by AndiesHandyHandies » Sat May 23, 2020 9:09 am

Hi

The M180 has gone to my 'engineering facility' to be physically and optically lined up, have custom baffles added to the OTA, slide in to preserve night time use my engineer said, and have the PST etalon auto-collimated using a tilter for the scope.

Looking forward to the result.

Cheers. Andrew.



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Re: Santel M180 F10 Rumak Maksutov first light

Post by AndiesHandyHandies » Tue Jun 23, 2020 8:44 pm

Hi

Had a play with this today.

Thinking about the baffling.

One thing I realised is that the Stage 2 Mod was developed on the Vixen VCM110 and the Collimating lens had to be moved right in as far as it would go for focus reach.

However in the Mak its 2cm inside the 200mm distance so Collimating 22mm beam instead of 20mm. Losing light. And allowing for intensity squared for detectability losing 1.46x.

My blocker tilter is just visible in the field with a few reflections so needs treating.

Drawn out a possible baffle option for the back.

Cheers. Andrew.



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Re: Santel M180 F10 Rumak Maksutov first light

Post by AndiesHandyHandies » Fri Aug 14, 2020 10:19 pm

Hi

Been using the Mak180 recently with the PST Mod or a 90mm Triplet with a Quark Prom.

The PST is frustrating because of the etalon reflections.
I had a session filing out some plastic Moon filters holding the PST Re-focusser and the Omega blocking filter
and using my new Black3 my son bought me for Xmas.

The 90mm is a bit sharper especially the spicules.

Also I want more resolution.

So I have tried on the Mak180

a ES 2x Telecentric with a Combo Porm Quark

and

the PST Mod with a 2x Clave' long barlow.

Even through haze and clouds today they seem to be on a par for imaging proms.

I have also added a tilter to each set up and still get focus. Fortunatley I got some new Blue Fireball 1.25" extension tubes so I could position the PST collimator lens up inside the Mak180 to get the focal point in the right place.

Need a session auto-collimating the two etalons. And some clear weather of course!

Cheers. Andrew.



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