Any feelings on buying the Megrez ED triplet instead of the new ZenithStar Fluorite Doublet since the cost of each is the same. The ZinithStar has the same...
-Hal....I picked it up on Astromart for about $90 about 2 years ago. It is the 2" flavor and I require a second 2" extension to reach focus using the WO 80...
Hi, Larry from Universal. There are different scenarios for mounting scopes on the MicroStar depending on whether the head assembly is the Basic or Deluxe...
Hi Mike, From what I've heard: color correction of the Megrez ED and Zenithstar Fluorite should be the same, but the Megrez ED does it with a triplet- design,...
Hi all, I have a general question about refractors (I have the WO Megrez II SD). How long does it normally take to cool down, and provide views that are good?...
Maybe you could leave the OTA in the garage or car (i.e. secure but cold) prior to observation? There are a few dessicant devices for refractors, though at the...
Thanks, Particle Wave's products are pretty cool. Since the cars are in the garage, and the garage is reasonably warm it doesn't make a whole lot of sense for...
Fluorite lenses in the element train always gives a perfect, color free image. Absolutely gorgeous! The fluorite lens has to be sandwiched between to...
Hi Paranoid Hal... It is really true? I know that the weather is the weak spot of a fluorite lens, but is it that bad??? So, better a triplet design with the...
Hi Timm, You have mentioned that "This is my first decent telescope", which makes one think that the telescope that you had before was an "indecent" telescope....
I'll stick with ED glass. That's why I have a Megrez 80ED, and a Zenitstar 80 Achromat. Of course, I'm paranoid. Normal people have had no problem with...
Hi Hal, did you not know that ED has also Fluorite in the material ? What you doing now with your ED ? ... Markus ... Zenitstar 80 Achromat. Of course, I'm...
Hi Timm IIRC, I've got a graph that compares cooldown times of different 80mm refractors here: http://www.cloudynights.com/documents/80mm.pdf In general I've...
FWIW Hal, Tak places the fluorite element (coated) on the OUTSIDE in it's FS doublet series. These have been in service for a LONG time, with only one...
OH NO!!!! FLUORITE! Markus, do you have any extra packages of dessicants? I'll line the tube and dew cap with hundreds of dessicant packages. Do you know those...
Tom, I'm just poking fun at Fluorite owners. But I'm still paranoid. I have a Brandon 94 and I'm worried about the Wesson Oil to leak out all of the place. ...
Hi Hal, Too funny - LOL - no I don't have any indecent pictures to share with you, other than the ones in my Photos folder here. You will see what remains of...
Thanks Tom, I know you deal with the same weather that I have, more or less. I forgot you had that chart in there - hmmm, so from the looks of it, I should...
Hal, actually, there's several ways to make a fluorite doublet - the ususal way is to put the fluorite element in back - to give it an additional level of...
Folks, is this fluorite doublet made of a fluorite crystal? Probably not, right? -it would be unafordable and possible too fragile. So the lens must be made of...
Joan, While the color correction really depends on the mating elements, there's no question that the other glass is important as well. Typically, you'll hear...
Hal, Tom, In the case of a raw chunk of fluorite, you're quite right - the fluorite needs to be protected. In the case of telescope optics however, the...
Actually Ryan, several different manufacturers (Vixen immediately comes to mind) didn't coat the fluorite element in many of their scopes. But in those cases,...
And Ryan, you're 100% right. The STM coatings are EXCELLENT for anti-reflection. Some of the best I've ever seen. I have no idea how they are on protection...
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