Good old Williams Optics Binoviewers.Will be great with your dob as well. Really enjoying mine with my 14" f5.1 dob.Will use also with my 22" f5.36 dob when primary is coated. The supplied 20mm 66deg oculars are quite good. However I wanted more magnification for moon and planets so invested in a pair of GSO 15mm 1.25" Superviews (70deg FOV), these work really well.I tried the GSO 15mm Plossls, but not so good; found images difficult to merge,and field of view too narrow. Enjoy.
I've just come back in after about 30mins and I'm a bit disappointed as the ' background sky ' is very dark and the stars are somewhat less ' luminous ' ... sort of takes the shine and brightness out of things.
Terrestrial viewing this afternoon was excellent ... but looking at the night sky was no where as impressive.
I used to own a LX90 8 inch SCT ...and had used WO Bino's in them ... and I can remember a much better outcome then .... maybe a ' mirror ' scope is better for Bino's.
It is not the quality of the Bino's that is the core reason for the result you are experiencing.
Bino's act by splitting the available light source in two to share between the user's two eyes. The amount of light to each eye is effectively halved, thus dimming the apparent brightness registered by each eye.
Our brains do not add the two together when processing the final image. So our final perception of the image is correspondingly dimmer.
The dimmer the original light source, the more noticable the dimming effect. Conversely as the brightness of the original light source increases the effect appears to disappear as the brain adjusts for high brightness levels. Hence your good experience with your earlier with daylight viewing.
This dimming will be apparent with your TV85 on all but the brightest objects as the scope is not gathering enough light. Larger scopes will deliver the extra light needed to overcome this dimming. Hence your memory of your earlier experience with the larger LX90 8".
It is not the quality of the Bino's that is the core reason for the result you are experiencing.
Bino's act by splitting the available light source in two to share between the user's two eyes. The amount of light to each eye is effectively halved, thus dimming the apparent brightness registered by each eye.
Our brains do not add the two together when processing the final image. So our final perception of the image is correspondingly dimmer.
The dimmer the original light source, the more noticable the dimming effect. Conversely as the brightness of the original light source increases the effect appears to disappear as the brain adjusts for high brightness levels. Hence your good experience with your earlier with daylight viewing.
This dimming will be apparent with your TV85 on all but the brightest objects as the scope is not gathering enough light. Larger scopes will deliver the extra light needed to overcome this dimming. Hence your memory of your earlier experience with the larger LX90 8".
I trust this makes sense.
Cheers
Steve.
Yes ... I understand all that you have said. ... Your quite right to.
For a year now I have used a Stellarvue BV with my Sky watcher ED120 and in all honesty I could not go back to one eyed viewing. The benefits of using 2x eyes for me far outweighs one eyed viewing easily. The relaxation and viewing comfort factor alone from using 2x eyes is immense - with no eyestrain I am able for view for hours with no more squinting. For me also the loss of light was balanced by the perceived brain summation of having 2x images instead of one. The secondary benefits are also having the 'pseudo' 3D effect - which just reinforced using my BV all most all the time. I actually ‘see’ more detail with my BV esp. on planetary images. Even at 200x images are bright and very rewarding. The Moon, Saturn and Jupiter especially have that 'wow' effect.
Most of my viewing is done on bright objects admittedly and occasionally for dim DSO’s I use mono viewing. I even have used the BV occasionally with my Williams Optics 66ED esp. for lunar viewing.
I suggest you keep using for BV as the advantages will become more apparent.
.Will be great with your dob as well. Really enjoying mine with my 14" f5.1 dob.Will use also with my 22" f5.36 dob when primary is coated. The supplied 20mm 66deg oculars are quite good. However I wanted more magnification for moon and planets so invested in a pair of GSO 15mm 1.25" Superviews (70deg FOV), these work really well
.I tried the GSO 15mm Plossls, but not so good
; found images difficult to merge,and field of view too narrow. 
