Tonight was my first chance to view through the APM150 with excellent transparency, fair seeing and no Moon.
Looking at M3 with a pair of 8mm Delos (103x) in the 150 and a 24 Panoptic (101x) in the Meade 12", the image is equally pleasing in both instruments.
The 12" shows a slightly brighter and more resolved core looking directly, while the 150 looks similar using averted vision.
M3 also appears larger in the 150, especially when using both eyes compared to just looking through one side.
The view of M42 looked better in the 150 because the Delos provides a slightly larger field than the Panoptic and frames the sweep of the nebula perfectly. The core was a bit brighter in the 12", while the 150 made up for it with excellent contrast.
Several of the very faint stars that surround the Trapezium are visible in the 150 with averted vision, while the 12" resolves them directly.
The E star was visible in both, but seeing wasn't allowing the F star to show up.
I also tried the 17.3 Delos (47x) in the 150 and was surprised to find the stars quite sharp near the edge compared to the smaller APM binos. Possibly due to the longer focal length.
It was too cold to do more comparisons, but from memory I think the 17.3 Delos has a slight edge on the 17.5 Morpheus in this regard. Very nice views at this power and field size(1.5 degrees).
M37 was a beautiful sight with 100 stars or more resolved into perfect little points of light. I can move the cluster right to the edge and it still looks sharp and resolved.
The galaxies M81/82 are also captured in the same field at this power. A hint of spiral arm is visible in M81 with a very bright core and M82 bright along it's entire length.
Having a 150mm binocular with variable power has made it difficult to go back down in aperture because of it's ability to look very deep into the sky, but as I found with telescopes it's rewarding to use smaller ones more often and break out the big glass when conditions are better.