Quote:
Originally Posted by astro1965
Hi all,relatively new to solar observing and have just recently purchased
a lunt 50mm scope.Have been enjoying using it and still trying to get the
best out of the scope.Would probably like to do a mod using a 120mm f5 refractor or possibly a 80mm f5.Would one of these be suitable to use with the Lunt 50mm f7 scope that I have?
Does anybody know of a good site with detailed instructions
on how to go about modifying this particular scope?Have been to the solar chat forums,but there seems to be so much info there,its all a bit too much for me.Thanks all,Nick.
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Hi Nick
I am using a 127mm F7.5 refractor with a Lunt DSII unit and Quark etalon in this way. I am however not an expert at mods and you can direct your query to the best solar imaging resource on the net here:
https://solarchatforum.com/index.php
In my opinion it would be far simpler using a Quark Chromosphere etalon eyepiece rather than doing the mod you suggest. It would however be more expensive! You would get away with not having an expensive ERF at the front of your 120mm refractor, something which would be essential if you tried using your Lunt's etalon. You would simply use an UV/IR blocker in your diagonal and then use the QUARK.
It is possible to do your mod but you would need to protect the Lunt's internal etalon unless you have an externally mounted etalon version. The protection would have to come from a full front 120mm ERF which is fairly pricey. Also the position of the etalon may require the tube to be modified in its length. You would also have to get the scope's focal length up to at least F20-F30 using a telecentric barlow.
Hope that helps.
Ted