As told before I think about stepping into Night Vision.
Actually I do own an APM 150 SD big binocular and my first idea was to put two OVNI-M to the eyepieces.
But this is terribly expensive and the more I am thinking about I am no longer sure if this is the best way to go.
With just optical tubes and eyepieces the advantages of two tubes with one objective for each eye are clear, binocular addidion gives us the following:
- 1.4x gain for pinpoint targest (stars)
- Even higher gain for diffuse objects like galaxies and nebulae
- 1.2x "virtual" magnification
- "image faults" at one eye like seeing condition can be eliminated by brain calculation
I believe with night vision the situation might be different.
Light and gain should not be an issue, the tubes will produce enough photons, maybe even too many so we need to dim the tubes down.
So I do not see the urge to give one OVNI-M to each eye to make the images brighter.
Using a OVNI-B with just one tube should still deliver enough light to each eye even with the losses of the beamsplitter.
The 1.4x brightness gain of binocular addition will stell be there like the 1.2x magnification gain with an OVNI-B
One thing is the szintillation, here two OVNI-M wolr have the advantage to deliver different scintillation patterns to our two eyes so our brain will eliminate a bog part of it.
But actually this does seem to be the only real advantage of two OVNI-M over one OVNI-B
But perhaps I am missing something.
How about the quality of the beam splitter in an OVNI-B?
Probably it is not as high quality as in good binoviewers.
But does the quality of the beam splitter in an OVNI-B affect the images?
Are star less sharp or pinpoint in an OVNI-B than in an OVNI-M?
Apart from this I do only see advantages of the OVNI-B
Only a singe objective is needed and from a 60mm APO up to a C14 all is possible
Also in low mag handheld use I do see advantages, with two OVNI-M the size of the two objectives is limited to around 55mm by the IPD
With the OVNI-B there is no limit.
And for the special case of my APM 150 SD, would there be a big difference in the views by using one OVNI-B with just one tube compared to using two OVNI-M in both tubes?
My feeling is no.
I am really interested in your thoughts and experiences so I can make the right decision