skies2clear
23-11-2006, 02:38 PM
Firstly, since I'm new here, hello everyone and happy viewing :)
I recently purchased a William Optics Binoviewer package, complete with 2 X 22mm WA eyepieces and a 1.6X OCS. My scopes are all newtonians, mostly made by yours truly ranging from 5" f7 to 12.5" f6. Not surprising, I couldn't get enough in-travel on my focusers to get it working, even with the 1.6X OCS supplied. There's a lot of info around that suggests ways around this, like using an extension tube between the OCS and the BV, or a different OCS, like Seiberts multimag.....all of a sudden the cost of admission is spiralling upwards!
The idea was to spend as little as possible to see if I liked the idea of 2 eyes is better than one. Nevertheless, I managed to use an Ultima 2X barlow with success (this gives more like 4X though), and eventually did some mods to one scope to get it going with the 1.6X OCS, although this is temporary.
I'm curious to know if anyone has seen a similar thing to me, in that, when comparing the light throughput from the LHS to the RHS, the RHS is noticably brighter, as well as having a slightly, but noticable difference in colour hue/tint. I don't think the BV has alignment issues, as I don't have any problems merging the 2 images, even with higher powers (maybe I'm cross-eyed!!!). The image on faint objects is noticably dimmer using the BV, compared with mono viewing. It does give a pleasant view in other ways, described by many others before me.
With all the generic Chinese BV's around, I'm curious if anyone has noticed this. Maybe the beam splitter in mine is defective, or maybe cheap BV's are like this?
Otherwise, the finish is pretty good, and the supplied 20mm ep's are pretty good. If I could gauge the ep's in performance, I'd say for sharpness, contast and light throughput, they work better than GSO Superviews, but not as good as Pentax XW's or Tak LE's (surprise, surprise).
Any ideas or comments would be more than welcome,
Clear skies,
Nick
I recently purchased a William Optics Binoviewer package, complete with 2 X 22mm WA eyepieces and a 1.6X OCS. My scopes are all newtonians, mostly made by yours truly ranging from 5" f7 to 12.5" f6. Not surprising, I couldn't get enough in-travel on my focusers to get it working, even with the 1.6X OCS supplied. There's a lot of info around that suggests ways around this, like using an extension tube between the OCS and the BV, or a different OCS, like Seiberts multimag.....all of a sudden the cost of admission is spiralling upwards!
The idea was to spend as little as possible to see if I liked the idea of 2 eyes is better than one. Nevertheless, I managed to use an Ultima 2X barlow with success (this gives more like 4X though), and eventually did some mods to one scope to get it going with the 1.6X OCS, although this is temporary.
I'm curious to know if anyone has seen a similar thing to me, in that, when comparing the light throughput from the LHS to the RHS, the RHS is noticably brighter, as well as having a slightly, but noticable difference in colour hue/tint. I don't think the BV has alignment issues, as I don't have any problems merging the 2 images, even with higher powers (maybe I'm cross-eyed!!!). The image on faint objects is noticably dimmer using the BV, compared with mono viewing. It does give a pleasant view in other ways, described by many others before me.
With all the generic Chinese BV's around, I'm curious if anyone has noticed this. Maybe the beam splitter in mine is defective, or maybe cheap BV's are like this?
Otherwise, the finish is pretty good, and the supplied 20mm ep's are pretty good. If I could gauge the ep's in performance, I'd say for sharpness, contast and light throughput, they work better than GSO Superviews, but not as good as Pentax XW's or Tak LE's (surprise, surprise).
Any ideas or comments would be more than welcome,
Clear skies,
Nick