Lunt LS60 DS vs. Solarscope Solarview 60 SS

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Calavera
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Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Sat Jul 11, 2015 9:42 pm

Hello,

I just think about adding a "little" grab&go scope to the equipment - what would you prefere: Lunt LS60 Doublestack with pressure tuning, BF1800 and Feather Touch or a Solarscope Solarview 60? The solarscope is known to be very, very good and the bandpass should be somewhere between the SS and DS Lunt...

Someone knows both systems and could tell about the differences? Otherwise any opinion is welcome! :)

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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by marktownley » Sun Jul 12, 2015 7:23 am

I think both would be excellent, but if pushed would go for the double stack lunt.
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Sun Jul 12, 2015 9:13 am

thanks! - do you know if the Solarscope could maybe doublestacked later on too?
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by marktownley » Sun Jul 12, 2015 9:39 am

yeah, double stacks are available.
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Montana » Sun Jul 12, 2015 11:31 am

If it were me it is DS every time, but you can always buy a double stack for the Solarscope too, so either would be a great scope. I am biased and love Solarscopes so any advice from me will be the Solarscope every time :lol:

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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Fri Jul 17, 2015 9:22 am

Hi - meanwhile I managed to bring two scopes in here for testing...

A Solarscope Solarview 60 SS and a Lunt LS60 SS (B1200, Tilt-Tuning, Crayford) - short version: Both scopes are great! :)

The Lunt is very, very good and suprised me a lot for a single stacked scope! It clearly shows prominences as well as filaments seen as cloudy beeings with a lot detail and the sky in the background is very dark. The tested one is from 2011. Only week-spot is a clearly seen unsymmetrical halpha FOV (sweet spot) - it can be affected by the tilt tuning with which you can change the position of the sweet spot - but it will not dissapear completely. But for me it´s not such a big thing as you may think because the B1200 leaves enough space with very sharp an nice halpha structures.

The Solarscope...? well - everything the Lunt can good to very good the SV60 can even a bit better... A bit darker background, a bit darker filament structures, a bigger sweet spot and in my opinion the biggest difference (not too big... ;) ) finer and more brilliant prominences. BUT compared to the price it´s - hmm... - next theme ;)

So for a maybe 20% better picture you pay around 300% of the price of the Lunt still on the used marked - but it seems often to be like this - if you want to improve a just very good system - costs raising exponential...

Mechanical I like both scopes very much - and the Lunt´s Crayford is good in my view too - especially if only used for visual viewing.

Finally both socpes must leave the stage if the LS152 comes in game... - if going just a little bit higher in magnification the resolution just beats everything you can see in the smaller scopes - but takes a lot longer to bring the scope in position and so the big strength of the 60ies is the grab&go factor.

So which to keep? Really don´t now... love them all - but would be great to see what a DS Lunt can do...

Cheers
Calavera

Lunt60:
+ great prominences and filaments for a SS system
+ great mechanical fit
+ easy handling and light
+ very good quality/price ratio - especially for used systems
- sweet spot clearly seen - but not too bad

Solarscope:
+ just a bit better in everything ;)
+ bigger blocking filter (20mm vs. 12mm on the Lunt - but missed nothing with the 1200...)
+ bigger etalon filter (60mm vs. internal ??mm on the Lunt) if this is an advantage...?
- a lot more expensive - where the bigger filters should explain most of that.
Last edited by Calavera on Sat Jul 18, 2015 1:01 pm, edited 2 times in total.
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by _Zakalwe » Fri Jul 17, 2015 1:04 pm

Try the pressure tuned version of the Lunt. it should remove the sweet-spot effect.

Re the Crayfords, I personally think that the standard GSO Crayford is a terrible choice for a scope of this price and quality. At the same time i feel that the Feathertouch (nice as it is) is probably overkill for what it can carry.

I found that a stock Baader Steeltrack (for Newtonians) fits perfectly and is a very, very good focuser. And it's less than 50% of the cost of the Feathertouch.

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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Fri Jul 17, 2015 2:32 pm

Hi Zak,

yes the steeltrack is a very nice focuser indeed - but I can´t see any problem with the Crayford too - I like it :) Maybe it´s a problem with heavy equipment like a binoviewer - but for monocular viewing... just nice - and I can´t watch stereo... so unfortunately no option for me...

The air pressure system is great too - know it from the LS152 but a bit heavy on the other side ;)

Well - both very nice to have - but nevertheless great scope without too...
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Carbon60 » Sat Jul 18, 2015 6:20 am

I'm still waiting for my DS unit for my pressure tuned Lunt60 (3 months now). When it finally arrives, I'll be able to run side-by-side comparisons, but I'm expecting the DS to be a significant improvement over SS. My only concern is the increase in exposure time, currently at 6ms for the SS. This probably won't be too much of an issue with FDs, but could be for closer views given the generally poor seeing that we get in the UK.

BTW, I love the Lunt 60. It's a great 'grab and go' scope IMHO.

Stu.
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Sat Jul 18, 2015 7:21 am

Carbon60 wrote:
BTW, I love the Lunt 60. It's a great 'grab and go' scope IMHO.

Stu.
That´s the point! :)

Btw. I asked about doublestacking the Solarscope and yes it´s possible but in this case you can´t go back again - so if doublestacked it stays doublestacked for all times ;) Ken told me it should be well thought about as prominences will not be shown that clear anymore... - of course for the improvement of surface details on the other side.
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Montana » Sun Jul 19, 2015 2:21 pm

I disagree that the prominences will be less visible, I have taken some of my best prominence images in DS. In DS it is much easier to take prominences and surface all in one shot too. The only difference is that the exposure times will be quicker in SS that is all (the prominences do not disappear).

I wonder why it will be permanently DS'ed? is that because he removes the ERF from the front, and the DS stack has the ERF on it instead? very curious.

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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by marktownley » Sun Jul 19, 2015 5:02 pm

Entirely my thoughts too Alexandra.
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Sun Jul 19, 2015 6:07 pm

Montana wrote:I wonder why it will be permanently DS'ed? is that because he removes the ERF from the front, and the DS stack has the ERF on it instead? very curious.
hmm - can´t tell you - got the info from Ken himself - maybe he adds the second etalon fix inside the scope so that you always would need the original front etalon with the included ERF... Singlestack would then maybe be possible if you take of the original filter and put an separat ERF in front... - but that wouldn´t be original... But really don´t know.

Today was only a very little chance for watching but the views just with the singlestacked SV60 were outstanding - so who really needs doublestacking ;) :D

...and having in mind the high price for doublestacking the SV60 I maybe would think about doublestacking the LS152 first ;) - the actual generation of DS modules for the "big one" should have less problems with halos and ghost-images as I heared...
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Sun Jul 19, 2015 6:10 pm

ah stop it! - he just gave me the reason in the mail:

"...Because the objective lens has to be mounted and sealed in the second etalon unit in order to maintain focal length, means the Solarview telescope cannot then be used at 0.7 angstrom with the single front ERF unit and our preference specifically for prominence observing."
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Montana » Mon Jul 20, 2015 11:40 am

Weird!

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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Sat Aug 08, 2015 8:54 am

...well finally I was lucky and could get a LS60 DS module and now really can compare site by site :)
IMG_9708.JPG
IMG_9709.JPG
IMG_9710.JPG
IMG_9712.JPG
Both scopes are great! and one couldn´t go wrong with either of them.

My impression put in numbers is as follows: (100% = best / 0% = worst)

SV60:
Proms: 100% Filaments: 85%

LS60SS:
Proms: 85% Filaments: 75%

LS60DS:
Proms: 75% Filaments: 100%

Well this is absolutely my personal and visual only impression and the LS60 suprised me a lot when first looking though it in SS! As mentioned above the SV60 can everything a bit better here - but putting the DS on the front of the LS60 it was just a very big "WOWW!" as all surface details become so contrasty and crisp... simply great! All the proms are just visible in DS too but as the picture is a lot dimmer they are not as brilliant to see as in SS.

The SV60 is a little bit compacter then the LS60 and a real grab&go scope - but the Lunt is not much behind here too.

The SV60 has a more even FOV - especially re. H-Alpha details - but the LS60 with DS is.... simply great!!! :)

Mechanical both are great!

So at the end I couldn´t say there is a real winner because there´s absolutely no looser when the Lunt is equipped with the DS. Did I mention that both scopes are simply great?

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Chris
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by marktownley » Sun Aug 09, 2015 6:48 pm

Thanks for the comparisons Chris
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Solar B » Sun Aug 09, 2015 11:20 pm

Many thanks for your honest appraisal , most refreshing :)
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Mon Aug 10, 2015 5:22 am

Re. the sweetspot of the Lunt - in my tilt tune version it´s about 50% of the FOV where H-Alpha structures are perfect - and that´s just enough to get the whole sun in - so I really have no problem with that as the views are stunning sharp and contrasty there . When adding the DS module to the scope there appears a clear ghost image of the sun (a complete second one - great! ;) ) but this is far outside the FOV so I can´t see any effects of it when looking at the real one. Only problem... - I just focused my view to the ghost sometimes when settled the telescope and wonder then why the sun is so fuzzy... - the ghost giggles then - while I go on to the real star... (reminds me to some scenes of Super Mario - as you know what I mean ;) )
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Montana » Mon Aug 10, 2015 11:47 am

I think double stacking will always win hands down, when I first saw a double stacked image I couldn't believe it, I had been missing half of the Sun for years ;)

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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Bob Yoesle » Sun Aug 16, 2015 10:45 pm

Agreed, once you double stack you won't go back. Another alternative for the Lunt DS internal-external would be a Lunt or Coronado external-external double stack - which is the most ideal because it has no field angle magnification -- and why SolarScope does it that way.
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Sat Nov 14, 2015 9:12 am

Hi,

for some experimenting before some months I bought a used Coronado Solarmax 60 filter together with a BF15 in package just a little bit over 1k EUR - so not too much compared to the other options around.

First I just want to compare it against the original Lunt DS unit on a Lunt LS60 - which worked very well with a special made adapter - as you can read here: http://solarchat.natca.net/viewtopic.php?f=4&t=17511

But a first manual test with this filter as DS-unit on the Solarscope was so much promissing, that I ordered a second adapter for this scope too. It was a little bit tricky as the thread of the Solarscope is very fine and not very long too - so I sended the dustcap with the order as master... The result is just perfect! The adapter fits for scope and filter of course - and just reaches for about 1mm over the objective ring with the Solarview writings (I didn´t wanted it to be scatched ;) ).

Well meanwhile I got this adapter back - and what should I say the result is the abolute best locking DS view I ever have seen. And the best thing - I can just screw down the second etalon and use the scope as SS like before.

I really don´t now why the solution is not offered from Solarscope original... - they offered me only a DS rebuild for about 4k EUR :shock: what was of course not an option - not at all as the scope then could only be used as DS as you can read above...

First I had some fears of ghost images - they are there of course but just so far away from the main picture that they don´t disturb anyway. Another great thing is, that the original tilting adapter of the Solarmax is not needed - I get the best picture just without it.

Compared to the Lunt DS - this are the pros:

- absolute no reflexes in the main picture and an abolute black background too
- tuning is needed only via one tilting unit (the original Solarscope one)
- absolute even picture all over the field
- second etalon much lighter compared to the lunt DS unit
- a lot of details all over the sundisc with greatest contrast - shows definately more details then the other scopes
- prominences just seeable in DS mode
- picture a litte bit darker then in SS but not to much

Maybe this sounds a little bit too euphoric - but the result is really that good! :)

To come back to the above rating...

SV60DS:
Proms: 95% Filaments: 150% :D

Here are some pics of the setup...
IMG_4725.JPG
IMG_4726.JPG
IMG_4730.JPG
Last edited by Calavera on Sat Nov 14, 2015 10:01 pm, edited 2 times in total.
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Solar B » Sat Nov 14, 2015 10:52 am

Now that's what I call DSing !!! ... I'm very jealous ... what a superb set up :)

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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Calavera » Sat Nov 14, 2015 11:24 am

Thanks Brian! Was a long journey to that final solution for a grab&go HA-scope... :)
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Re: Lunt LS60 DS vs. Solarscope Solarview 60 SS

Post by Montana » Sat Nov 14, 2015 12:34 pm

So it is a Solarscope with a Solamax on the end for DS, for the final version?

:hamster: :hamster: :hamster: I'm glad it works well, I look forward to some images through it :)

Alexandra

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