It's Tuesday

Brian

Nor I at least I'll be able to try its quark in other configurations

Presently it would make a great wee imaging scope if so inclined

Brian

marktownley wrote: ↑

Mon Jun 01, 2020 2:45 pm

Is taking it apart an option?

It is Mark and I don't normally but it's coming to that ... I think it's a good wee scope

and I just know there is more to be squeezed out of it , mobile quark ect

Brian

Hi Folks I bought a used 60SS last Autumn and have quite liked it ... however I have found that it's only really usable with a 25-30mm EP & here the image becomes just bright enough but does display reasonably good surface detail , I read a lot now that many consider theirs to be too bright and of c...

Very interesting thread ... I've been thinking about removing the quark from my 60SS However mine displays quite a dark image compared to these , it does offer good surface detail when the seeing is ok ... the quark unit simply unscrews from the 80SS but would also require an adaptor of sorts. Brian

Wow amazing work me thinks ! all captured with a PST etalon at its heart

Incredibly sharp images

Brian

https://www.hpb.com/products/imaging-the-sun-using-a-digital-spectroheliograph-9783319248721 Is this the book Ken ? And thanks Bob ..... great to hear from you to 👍 Oh and I had long since forgotten about that CN thread also ....... my relatively insignificant thread has turned into something quite ...

Thanks John

I had read Colinskis detailed reports before but had long since forgotten about

them

Brian

Many Thanks All

But I'm still looking for something that's perhaps a little less highbrow if possible ?

Brian

Thanks Pedro

I have looked at Christians site before but I don't think it's necessarily for beginners though.

Brian

Hi Folks

I have been asked for a link to info on etalons in general ... say air spaced v solid or just

a general understanding of bandwidths and how etalons operate.

If anyone can advise on some info on here then that would be great

Would be good for me to read as well

Thanks .... Brian

You havn't lived unless you've been through a few boa's

Last time my mate was using a car oil filter wrench constrictor on his & my PST

Brian

Shown is the EP holder & Spacer assembly

BF6mm on the left and the ITF (prone to
oxidation) on the right.

Brian

Thanks Mark .. I doubt the etalon itself would reduce the transmission enough by bouncing it around having to cope with that kind of intensity ... I was thinking the erf could be by the BF like the PST but of course the SMs are all in a regular diagonal format .. I reckon I'll stick with the 60 in D...

James I do think the calcium wavelengths are worth looking 😉 into , however as always caution is advised. My own experience at 495nm is very limited .... approx 14 yrs ago I did have a Cak PST ... couldn't see a thing but it was amazingly good for imaging .... around the same time I obtained one of ...

I see Pete tested it Mark (he used to image with an DSSF70 as I recall) beautiful scope !! Funnily I read this review only last week as was considering one Yeah the stand alone SMII 60/90s OTAs do not have the red rg630 erfs but must have a means of rejection , if you can check your 90s objective th...

Thanks Andrew That all sounds very interesting .... I have a 60mm DS and like its convenience and user friendly- ness over the quarks which I always found to be hard work at the EP. I understand now ...... your effectively stepping your 100mm with a reducer down to about a 930mm FL of the 60DS in or...

Yes some pics would be great plz

I'm not sure I understand the 60DS and macro lens reducer are you referring to the

Day Star 60mm DS ?

Brian

I'm none the wiser Mark ? Yes I recall the original otas were brass , mine is the newer (cheaper) finish , so where abouts in the assembly is the ERF ... as they are obviously normally red or have a mirrored finish , you say yours is an older SMII or is it an SMI without ERF to the OTA so I take it ...

I'd prefer some clarification on that ... there are clear objectives with ERFs by other manufacturers but I recall reading on CN 10 years ago or more that some of the factory DS Coronados did not have an ERF to the internal scope , around this time they were switching from 2 external to 1 internal &...

The big gold scope looks great ... I think your gonna have a lot of fun with it. I'm most jealous again 👽 :mrgreen: Brian Hang on though I think you can only use the factory DS Coronados in DS mode (not SS) as the internal etalon does not have an ERF ... I'm sure this is the case with my SM60IIDS bu...

True but I'm sure you already know Rupert

That rusty Coronado ITFs are only a $75 fix from Maier Photonics for a new one.

Actually last one I obtained a couple of years ago was $89 shipped

Brian

Best of luck Achim ... I had a PST EP holder and spacer loosen in my hands this evening ,

the threadlock just fell to the floor .... and it is my original PST from 2005

Brian

Oh dear oh dear ... it sounds worse than the current pandemic

Brian

James I wouldnt necessarily worry about the SMII series being discontinued ... it probably already was months ago in favour of the III series , I'm still using some "series I" kit and have been using an SM60IIDS for years without issue ... Truth be told its a very rare chance to obtain some new SM90...