I use a 10X50 SV hand-held during the day and mounted at night for astronomy.
Are you using a binocular mount for astronomy use?
I purchased a 10X50 SV primarily for backyard astronomy use, though I often use it during the day. I immediately constructed a binocular mount that allows me to lie back in a chair, align the binoculars to my eyes and sit back and watch a completely stabilized view of the night sky. The difference between hand-held and stabilized viewing with a binocular is impossible to explain. For me, it's the difference between OK and WOW that's truly amazing. I also mount the following: 7X42 SLC, 8.5X42 SV, 8X32 SV and my Nikon 8X32 SE. Mounted, the best choice I have is the 10X50 SV. For casual hand-held sessions I prefer the 7X42 SLC, though my wife's 8X32 SV is the stellar hand-held choice for pure enjoyment.
The so-called flat field of the SV is a real benefit when viewing the night sky.
Here's a photo...