Experience with SM2 and SM3 scopes

Use this section to discuss "standard" Baader/Coronado/ Lunt SolarView/ Daystar, etc… filters, cameras and scopes. No mods, just questions/ answers and reviews.
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hopskipson
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Experience with SM2 and SM3 scopes

Post by hopskipson » Sat Feb 29, 2020 6:01 pm

Hi all

I'm contemplating buying a 90 mm Solarmax scope at NEAF this April. I'm leaning towards the SM3 with its external etalons. The thing is right now I can only afford the single stack model. Right now the few double stacked SM2's are on sale and you can pick one up for approximately the same price as a SS SM3. My question is "Has anyone looked through a SM3 or compared it to a SM2?" I'm going to double stack the SM3 in the future I just want to get an idea if possible any noticeable differences between internal and external etalons.

Thanks in advance
James

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DeepSolar64
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Re: Experience with SM2 and SM3 scopes

Post by DeepSolar64 » Sat Feb 29, 2020 6:55 pm

Hey James,

I have a SolarMax II 60 DS and it works great so a 90 would be only better. I might be wrong and someone else here may correct me but I think they don't sell the SM III etalons separately like they do the SMII. You cannot upgrade later to a DS if you initially buy a SS. You have choose to go SS or DS right off. With the SMII series you have the option to buy the single stack and go back later and buy the second etalon for DS separately. I just don't think Meade/Coronado sells the DS etalons apart from the scope on the SMIII series. I have never seen them listed as such.

Now if you can pick one up gently used that would be a plus.

James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado AZS Alt/Az Mount
Lunt, Coronado, TeleVue, Orion and Celestron Eyepieces

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DeepSolar64
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Re: Experience with SM2 and SM3 scopes

Post by DeepSolar64 » Sat Feb 29, 2020 7:03 pm

Again...

The SMIII is almost certainly the best made of the two. Anodized brass tube, much better focuser and totally external etalons. You can remove them for nighttime use! I have never had the pleasure of looking through one.

Stephen Ramsden ( SolarChat ) has an exellent review on the 70mm model.

https://www.youtube.com/watch?v=piAvHg5ZnF8

James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado AZS Alt/Az Mount
Lunt, Coronado, TeleVue, Orion and Celestron Eyepieces

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hopskipson
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Re: Experience with SM2 and SM3 scopes

Post by hopskipson » Sun Mar 01, 2020 4:59 am

Thanks James for the link. I’m sure eventually Meade will come to their senses and sell the etalons separately. I also heard that the double stack SM 2 etalon will fit the 3.

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Re: Experience with SM2 and SM3 scopes

Post by DeepSolar64 » Sun Mar 01, 2020 6:06 am

hopskipson wrote:
Sun Mar 01, 2020 4:59 am
I also heard that the double stack SM 2 etalon will fit the 3.
I have wondered about that. Make sure before you buy.
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado AZS Alt/Az Mount
Lunt, Coronado, TeleVue, Orion and Celestron Eyepieces

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