Hello: I have a question about the ZenithStar 105 ED APO. On ATWB it shows this as having a 2.5" focuser. My question is this. Is that a pretty stable and...
Hi Sam, I have this telescope and shed a little light. The focuser draw tube ishousing is 2.5", but the drawtube is for 2"; with a 1.25" adapter included....
... I have no doubt that this is true for 2" eyepieces, but personally, I wanted a super small, super light setup, so didn't want a diagonal/EP that weighed...
... Oops - correction: I re-checked my notes and I did not test the WO binos with the 1.25" mirror diagonal (I only look at the Moon with corrected-image). ...
... Apologies for my earlier posts on this topic - I misread the 'ED' in the topic title as 'SD'. My posts relate to the SD doublet only - I have not used the...
Dear WO-friends, I'm looking for a review or some 'headlines-experiences' with the Zenithstar fluorite doublet. I did a search, but could not find a review...
Hi Barry: Thanks for the link. Is there a review on this scope ? How can I mount this ontop of my Meade 2120 [10" SCT] which is on my Gemini G11 ? I am using...
The Megrez 80mm FD is the same scope but just in a different color (read some of the past posting on this). I also posted several reviews and sample shots...
... I did an search and one for sale (in a latin country) in Nov 2003 was described as semi-apochromatic. Did not say how many lens elements involved....
Remember Fluorite lenses come in 2 types, one is a fluorite crystal grown in the lab, the other is glass with fluorite content, which one is used in the 80 FD?...
... Perhaps; but I can see vignetting in my exemplar of ZSFD. Fully illuminated field is essentially zero. If you shave off say 5mm of aperture, it's OK...
The focuser is very robust. I beleive the focuser travel is 73mm. As to how much can it support? I really don't know in terms of lbs, but I can say it ...
Some details please eyepiece ? photo film, ccd (size, projection or prime focus?) binoviewer?, diagonal and or extension tube. David ... Perhaps; but I can...
I have no idea... but does it matter? the performance of the lens is as much to do with the mating Crown element and various other factors as well. ATB Ian ...
... With pleasure. I use 1.25" diagonal plus 2" extention tube, but that doesn't matter as neither of those vignette. When I focus at infinity (daytime) and...
To All: I recently purchased the 66mm f5.9 William Optics ZSSD doublet apo refractor for use as a "superfinder" on my 18" Obsession. Others with Big Dobs have...
A few weeks ago WO asked folks what type of telecope they would like to see next. Has anything been said about those "results"? Just curious! Mike Orlando,...
Hi, I think its like the focuser on my Megrez, and if so, then there are three screws. The thumbscrew that locks the rotation of the focuser from spinning in...
Hi all, I haven't had as much time to work on this as I had hoped, but I posted the first version of the FAQs in the Files section, in a folder called FAQs, of...
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