My eyepiece collection is a bit of a mixed bag of Panoptics (35mm and 22mm), a Plossl (15mm), Naglers (12mm and 9mm - Jimi might remember the 9mm, he sold it to me!) and Radians (5mm and 3mm) and I am largely happy with this collection - except the Plossl which I'd ideally like to replace with an equivalent Delos or Nagler. The 15mm Plossl gives a magnification of 132x.

I am wondering though, whether I would also be better off replacing the Radians, too, with a Delos (I want to stick with TeleVue) such as the 4.5mm or the 3.5mm. I use the 5mm quite a lot and the 3mm when the seeing allows and when I am observing small objects such as tiny galaxies, PNe and small globs, etc. In my 18", the 5mm and 3mm Radians give magnifications of 395x and 658x respectively while 4.5mm and 3.5mm Delos eyepieces would give magnifications of 439x and 564x.

I have compared Deloses with equivalent eyepieces, such as Radians, at TSP last year and also at my own local star party, and I found the contrast in the Delos was better although these were longer focal length eyepieces than the ones I'm considering.

So, would you replace the 15mm Plossl and what with, and would you also trade the 5mm and 3mm Radians for similar focal length Deloses? Or even something else (although I'd rather stick with TV)? Do I even need so many eyepieces - they all get used but the 22mm, 12mm, 9mm, 5mm all get used more than the others...?

Btw, I wear glasses for observing because I find it a real PITA to keep putting them on and taking them off again, so good eye relief is an important consideration.