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Luntanado using a Coronado SM 60?

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#1 Tom and Beth

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Posted 24 January 2012 - 12:35 AM

if so, with which Lunt scope?

If this has already been discussed, please just point me to the thread(s). Thanks.

#2 Bill Cowles

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Posted 24 January 2012 - 02:15 PM

I use the SM60 on my Lunt 60 and also stack it on my Lunt 50mm filter for a "Tri" stack. It works, but I think the Lunt filter is a little better,but unless you compare them side by side, don't think you would notice the difference. You will need an adpt, which is available from Lunt.

I only deceided to use the filter since I hated to see it gather dust, after getting the Lunt 60DS. I think you would really like the Luntanado especially if you already own the SM60.

Bill

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#3 Bill Cowles

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Posted 24 January 2012 - 02:24 PM

Here is a better image showing the adaptor and SM60. I think the SM filter is easier to tune, due to the tuning wheel, sitting higher, than the Lunt filter.

Bill

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#4 Tom and Beth

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Posted 24 January 2012 - 06:22 PM

Thanks, Bill. That indeed looks nice.

I do indeed have the SM60. It does make for a good travel package with the TV-76. After several months of a SM90 on the 100 I've gotten spoiled, and it's much easier to do the Luntanado than try to get another SM60 that would match.

Thanks again. It's a very attractive kit you have there. :waytogo:

#5 BYoesle

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Posted 24 January 2012 - 06:23 PM

If you are only going to use the Coronado for DSing, you may also want to consider removing the red glass ERF and replacing it with a clear optical window to protect the etalon. The internal etalon already has an ERF and the Coronado’s ERF would be unnecessary in this set up - this will achieve a significant increase in image brightness.

#6 Tom and Beth

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Posted 28 January 2012 - 06:06 PM

Hmmmm, interesting, Bob.

Knowing that a "Clear optical Window" can be difficult to come by in the right size with good optical characteristics, would an IR/UV block filter work? I already have a B&W filter in that size (Scott Glass)

#7 Bill Cowles

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Posted 28 January 2012 - 06:51 PM

I even tri-stack. The image is dim, but the smaller sweat spot sure is nice. I compared both and I think the Lunt 50 gives a little better image, but then the SM60 is probably not matched for the Lunt, still it gives a beautiful image.

Bill

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