Posts Made By: Laurence Behney

Sissy Haas wrote a book entitled: Double Stars for small telescopes. Unfortunately it is out of print and selling for wads of money, but there are some pdf sources you can buy, which are available for less money. More than 2000 interesting double stars listed in this book with nice comments from the author about each binary. 
The Cambridge Atlas of Double Stars is much less expensive and very complete. It has maps, unlike the Sissy Hass book, and so it can be useful for those with manual mounts. It has an appendix listing a nearly unlimited number of double stars divided into constellations. AND it has all the interesting double stars marked with an asterisk and a comment about the double star or multiple star system!! 
I have a Celestron CGEM II mount, and although it has an internal list of double stars, the list is quite small, so I understand your plight.
CS,
-Larry

Yes. A notification or message to one's phone might be nice when someone responds to your wanted or for sale classified. This might not cost Astromart anything, if the person placing this advertisement would pay a small fee for this option at the time of the advertisement placement.

Thanks for letting me know. If I were to allow my phone to ping every time I received an email, I would never get a rest. Is there a way to set the email so that only Astromart classified alerts to my email would create a ping?

Fluorite refractors are special and they keep their value. The extra aperture also makes it the one I would prefer. 
Good luck in your choice, whichever it is you pick. 

Originally Posted by Dean De Lucia

People,

This question might be unecessary, but I have been wondering if a Paracorr could improve a SCT's edge performance. They are supposed to be corrected anyway, but could a Paracorr give a final touch?

Dean

I do not know with confidence, but I suppose that this may be effective, because it is probably designed to deal with edge of field coma correction and this is where coma is usually found. On the other hand, the corrector plate and the curved secondary mirror might be factors which the Paracorr was not designed to deal with.  If the coma correction applied by the Paracorr gets applied across the entire field, this might cause distortion of the appearance of stars.

Yes it is great. A gentleman with a nice C14 offered us to share his views of the Veil Nebula. It was fantastically detailed and bright in his telescope. A forever memorable view against a very dark sky with steady seeing.