Hi,
I own a 27mm Panoptic and a 31mm Nagler. The 31mm Nagler is a much better eyepiece in every criterion except size and weight. I only have the 27mm pano because it is small and light and balances nicely in my 10" dob. IMO it is also too close to your 24mm Panoptic. Personally I prefer the 27mm Pano over the 24mm Pano because it is a lot more "immersive" IMO, notwithstanding the 24mm Pano is a touch sharper. Knowing what I know and knowing what I like, I would give a lot of consideration to buying a 26mm Nagler while the sale is on then selling your 24mm Panoptic when the sale has finished. Outside of size and weight the 26mm Nagler is a better eyepiece in every respect than the 24mm Pano. Personally I think the 31mm Nagler is overkill in a 12" scope and it is much better served by the 26mm Nagler which is a bit smaller and lighter and IMO a touch better optically than the 31mm.
Cheers,
John B
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