... Thanks also to Yuri, for posting that image. As Roland mentions, one fluorite element isn't likely to make a noticeable difference when it comes to...
If you remove the diagonal mirror from the housing and hold it up to the light with the back side facing you, the dielectric diagonal will change colors from...
Clive; I believe Fluorite and other optical elements that can transmit and focus UV have becone standard in optics used for photo printing the masks on...
It seems like relatively few refractor users any more do much viewing without a diagonal. I suspect that this is due to the generally much lower mounts used...
Rich, I promised you a .pdf file of Wald's 1967 paper, but now I come to find out the JOSA is electronically archived only back through 1984. I have a paper...
... Right, Rich. The Tak 1.25" prism diagonal I owned was very fine. It worked well with the f/8.1 ratio of the FS-78. However, faster refractors usually ...
Ron; Thank you for the effort expended anyway. When it comes to items like this I believe that some skepticism on the part of others is appropriate and...
Simple prisms will cause color error in a scope not designed to be used with a prism. The effective path length through the prism for the different colors is a...
Hi Scott, From what I have read and understand, most prism diagonals are really designed for daytime spotting scope use and NOT recommended for star gazing,...
... really ... For the past 12 years I have almost exclusively used Zeiss binoviewer with its own prism diagonal for lunar/planetary observation, the scopes...
Yes, and this is precisely why I added my comment. Rich informed me that the two of them had been emailed directly off-line at the same time that Rich posted...
Thanks Roland, That's an awesome image. I don't have any interest in viewing green laser trails through my scope, but it does sound to me like people are...
I think the conventional wisdom on tripods is to make the telescope as high as your head, but low enough to reach the clamps and slow motions. Even with a...
Hi Timm I think the reason people talk about daytime or night-time viewing with regard to prisms, is due to the light scatter due to the roof edge. Because...
... Hi Timm. That web document seems to have been the source of much telling and re- telling of fluorite's alleged advantages. It would be interesting to know...
Hi Darren, I think that your post may have been a reply to my suggestion that refractor correction be designed around or extended to include the response peak...
... Bud, the longer the scope, the more the EP ranges from horizon to zenith. To remedy this, I ordered a geared tripod to see if I can hold the chair in one...
Timm; The WO diagonal is the one I mentioned as not being as good as the Baader or my WW2 90 degree Amici prism diagonals by my star testing. It is also not a...
Just an update as promised. I received my new focuser for my ED114SS from Ron at 'Moonlite' the model is the CF2VS. Beautiful piece of kit the 'mutts nuts'. It...
Hi Rich, Thanks for the "heads up" on this. Was it the 45 deg or the 90 deg 2" prism you looked through? As far as I can tell, WO has the only 45 deg 2" Amici...
Timm; The 90 degree version is what I have. There is another 2" 45 degree terrestial diagonal choice as Vernonscope, the maker of Brandon eyepieces, has one...
Timm; The 45 degree 2", so called, WO terrestial diagonal only has a Clear Aperture of 31mm according to the info posted on the OPT web site. Rich Wood...
... wrote: Out of curiosity what does your 6" brass tube assembly weigh complete? Rich Wood Sorry for the delay in responding, but the scopes were up on the...
... This clear apt. is another specification I don't see written often enough. I just called WO to find out.... they need to find out from overseas.... Is...
Rich All this diag. talk made me think ......... how does one calc. how big of a field stop a diag will allow an EP to see? Is it strictly a function of the...
Rich The CN review on the WO erecting prism was..... great for daytime use, but not for astro....is this a general consensus of erecting prisms, or unique to...
Timm ... Great point timm, I am interested in this also....as I wanted a good 45 deg. corrected prism for birding also... the TV 45 deg I have does not correct...
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