whats the best scope to use ith a SM90II etalon and BF30?
whats the best scope to use ith a SM90II etalon and BF30?
As i said in the topic title, i am interested in what people have to say on what the best scope/etalon combination for this?
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Re: whats the best scope to use ith a SM90II etalon and BF30
I used a pre-meade SM90 with a TV101 F/5.4.
This Etalon is now sold but I will have a SM60 (also pre-meade) soon that I will use with the same scope for FD imaging. I will use it with a Coronado BF10 and a LUNT B1200
Pedro
This Etalon is now sold but I will have a SM60 (also pre-meade) soon that I will use with the same scope for FD imaging. I will use it with a Coronado BF10 and a LUNT B1200
Pedro
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Re: whats the best scope to use ith a SM90II etalon and BF30
well, the best scope to use with that etalon/BF combination would be a single etalon Coronado 90mm internal etalon scope, in my opinion.
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org
Re: whats the best scope to use ith a SM90II etalon and BF30
solarchat wrote:well, the best scope to use with that etalon/BF combination would be a single etalon Coronado 90mm internal etalon scope, in my opinion.
ok so you are suggesting that I purchase a Coronado 90? well here in Australia they are a small fortune - that's why i jumped at the chance of getting the etalon for 3.5k. a dedicated 90mm scope with bf15 is 5k, with a 30BF its 6k and DS is 9k. I was thinking i could have mounted it on another scope or my existing large refractor but i take the point
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Re: whats the best scope to use ith a SM90II etalon and BF30
maybe I didn't understand the question..
If you already have an external Coronado 90 filter and want to put it on the "best" scope possible, I suggested the Coronado 90mm internal etalon scope. Then you would end up with a doublestacked 90.
Do you mean which of your current scopes would be best? What are your current scopes?
If you already have an external Coronado 90 filter and want to put it on the "best" scope possible, I suggested the Coronado 90mm internal etalon scope. Then you would end up with a doublestacked 90.
Do you mean which of your current scopes would be best? What are your current scopes?
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org
- swisswalter
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Re: whats the best scope to use ith a SM90II etalon and BF30
Hi David
I would mount it on a TAK102
I would mount it on a TAK102
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
Re: whats the best scope to use ith a SM90II etalon and BF30
far too many scopes all at the low end, 127ed ed80's 14" meade acf, 11 celestron, 8 inch meade ACFsolarchat wrote:maybe I didn't understand the question..
If you already have an external Coronado 90 filter and want to put it on the "best" scope possible, I suggested the Coronado 90mm internal etalon scope. Then you would end up with a doublestacked 90.
Do you mean which of your current scopes would be best? What are your current scopes?
Just Learning
Re: whats the best scope to use ith a SM90II etalon and BF30
thanks Walter, do you see these 2nd hand much?swisswalter wrote:Hi David
I would mount it on a TAK102
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Re: whats the best scope to use ith a SM90II etalon and BF30
Hi David
from time to time ther is one up on astromart or Astronomie de or astro inof
from time to time ther is one up on astromart or Astronomie de or astro inof
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
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Re: whats the best scope to use ith a SM90II etalon and BF30
The best telescope for using a Ha 90mm external etalon is a telescope with minimal spherical aberration at this wave length.
Among compact telescopes are:
1. Synta or Made 102mm F/10 simple achromat. Any of them. Will work better than any TAK doublet apochromat.
2. Meade AR 129mm F=1200mm will work even better. But it much less compact than the scopes above.
Valery.
Among compact telescopes are:
1. Synta or Made 102mm F/10 simple achromat. Any of them. Will work better than any TAK doublet apochromat.
2. Meade AR 129mm F=1200mm will work even better. But it much less compact than the scopes above.
Valery.
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Re: whats the best scope to use ith a SM90II etalon and BF30
well I am learning stuff all the time, thanks. i was thinking of and extra scope to image with , you know when the sun goes downValery wrote:The best telescope for using a Ha 90mm external etalon is a telescope with minimal spherical aberration at this wave length.
Among compact telescopes are:
1. Synta or Made 102mm F/10 simple achromat. Any of them. Will work better than any TAK doublet apochromat.
2. Meade AR 129mm F=1200mm will work even better. But it much less compact than the scopes above.
Valery.
Just Learning
Re: whats the best scope to use ith a SM90II etalon and BF30
well i went ahead and visited my local machine shop - $300 later and i will have within 2 weeks an adapter for the 127ED to take the SM90. mind you though for the chunk of metal its a very expensive adapter
Last edited by Houghy on Sun Mar 02, 2014 10:05 pm, edited 1 time in total.
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Re: whats the best scope to use ith a SM90II etalon and BF30
Houghy wrote:well i went ahead and visited my local machine shop - $300 later and i will have within 2 weeks an adapter for the 127ED to take the SM90. mind you though for the chunk of metal its a very expensive adapter
Hi Dave
yes I wonder too. 1 KG of my stuff is sold for maybe 30 $, 250 g of formed metall is sold for 300 $. Next time I come down to earth . I'll get me some metal and a lathe
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
Re: whats the best scope to use ith a SM90II etalon and BF30
i updated the above post to include the design of the plate
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Re: whats the best scope to use ith a SM90II etalon and BF30
Nice plan!Houghy wrote:i updated the above post to include the design of the plate
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!
Re: whats the best scope to use ith a SM90II etalon and BF30
well i hope it works - and functions as it should. so should i paint the outside white?marktownley wrote:Nice plan!Houghy wrote:i updated the above post to include the design of the plate
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Re: whats the best scope to use ith a SM90II etalon and BF30
Hi
Will your adapter plate be thread into dew shield?
Will your adapter plate be thread into dew shield?
Aleksey
-------------
Lunt LS100THa, Coronado SolarMax II 90 Filter + BF 15 on WO Megrez 90, PST + SW 1025 mod, Quark + SW150/750 in test mode
-------------
Lunt LS100THa, Coronado SolarMax II 90 Filter + BF 15 on WO Megrez 90, PST + SW 1025 mod, Quark + SW150/750 in test mode
Re: whats the best scope to use ith a SM90II etalon and BF30
yes directly into the shieldRybak wrote:Hi
Will your adapter plate be thread into dew shield?
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Re: whats the best scope to use ith a SM90II etalon and BF30
Houghy wrote:yes directly into the shieldRybak wrote:Hi
Will your adapter plate be thread into dew shield?
Hate to say it Huff mate, but if I understand your "yes directly into the dew-shield" I reckon you'll be disappointed.
The SM90 x 2 is huge, and more to the point HEAVY, it will tilt the dew-shield depending on the orientation.
The SM60 setup I had worked on the FS78 scope, and it meant removing the dew-shield completely, and attaching directly to the "ring" that the dew-shield screwed onto. This was rock solid, and introduced no tipping/tilting whatsoever. (I still have the SM69-FS78 fitting if there is anyone out there that wants one).
One way to find out though, expensive way, but you'll know soon enough.
Gary
Re: whats the best scope to use ith a SM90II etalon and BF30
I only have one Sm90?gbealnz wrote:Houghy wrote:yes directly into the shieldRybak wrote:Hi
Will your adapter plate be thread into dew shield?
Hate to say it Huff mate, but if I understand your "yes directly into the dew-shield" I reckon you'll be disappointed.
The SM90 x 2 is huge, and more to the point HEAVY, it will tilt the dew-shield depending on the orientation.
The SM60 setup I had worked on the FS78 scope, and it meant removing the dew-shield completely, and attaching directly to the "ring" that the dew-shield screwed onto. This was rock solid, and introduced no tipping/tilting whatsoever. (I still have the SM69-FS78 fitting if there is anyone out there that wants one).
One way to find out though, expensive way, but you'll know soon enough.
Gary
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Re: whats the best scope to use ith a SM90II etalon and BF30
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!
Re: whats the best scope to use ith a SM90II etalon and BF30
I use DIY adapter plate on my Skywatcher 102 mm f5. And I control the tilt of adapter plate by GMK collimator.
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Aleksey
-------------
Lunt LS100THa, Coronado SolarMax II 90 Filter + BF 15 on WO Megrez 90, PST + SW 1025 mod, Quark + SW150/750 in test mode
-------------
Lunt LS100THa, Coronado SolarMax II 90 Filter + BF 15 on WO Megrez 90, PST + SW 1025 mod, Quark + SW150/750 in test mode
Re: whats the best scope to use ith a SM90II etalon and BF30
Correct me if I'm wrong but aren't the Meade the same as a Bresser for $795 looks good to me and no way would I hang a SM90 off a dew shield.Valery wrote:
2. Meade AR 129mm F=1200mm will work even better. But it much less compact than the scopes above.
Valery.
http://www.astroshop.com.au/products/de ... d=MAS-031B
Or a 152mm for $1175
http://www.astroshop.com.au/products/de ... d=MAS-031C
Alan
Re: whats the best scope to use ith a SM90II etalon and BF30
Only paid $180 for this adapter, your machinist is very expensive David.
Alan
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Re: whats the best scope to use ith a SM90II etalon and BF30
Nice setups chaps!
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!
Re: whats the best scope to use ith a SM90II etalon and BF30
Thanks Mark.marktownley wrote:Nice setups chaps!
Alan