One more update
Yesterday, I observed M 46 again and I wanted to compare the three eyepieces (Brandon 32, 24 and TV Panoptic 19). I used the finder for star hopping with the 19 Panoptic.
I changed to 32 Brandon and It was difficult to discriminate the stars of M 46 from the light polluted background. I changed to 24 Brandon and I could resolved many numbers of stars in this cluster. I could clearly saw the cluster with high contrast.
With the 19 Panoptic, I found the cluster easily and the number of stars I saw was more by one third of what I had seen with the 24 mm Brandon ( better light grasp with Panoptic). I saw not less than 30 stars and even more with averted vision.
The panoptic will get more use in my extremely light polluted sky.
I still prefer Brandons for high contrast well illuminated targets and in dark sky trips.
Edited by GR1973, 26 January 2020 - 06:55 AM.