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Lunt LS35THa telescope with high contrast etalon. Wanted

Price - $1.00

Ad Number: 185897

Posted: 09 Oct 2019

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Hi all,

Will pay a premium price if the telescope (it's etalon) is exactly what I am looking for!
Please, read carefully to understand what I am looking for.


I am seeking for a Lunt LS35THa telescope which has a really good H-a etalon.

What kind of an LS35THa telescope am looking for:

1. The etalon in this telescope should not require or require a really minimal tilt to come to the best contrast when being used at about sea level altitude (not higher than 70-80m ).
a) at the atmospheric pressure about 29.50 inch Hg - no tilt required (no gap between the etalon flange and the filter base - where the tuning tilt wheel located.

b) at atmospheric pressure about 30.00 inch Hg - very little tilt required a gap between the etalon flange and the filter base - where the tuning tilt wheel located should be no larger than 0.3mm.

3. The telescope must have high contrast view of the solar details:
a) even weak active areas should really shines over the sun background
b) dark filaments should be really dark (while not black, of course)
c) mottling in the "desert areas" should be very easily seen in all parts of the solar disk.

4. Proof images taken with the filter are required.

Thanks for reading.


Regards,

Valery

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  • Location New Jersey.



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