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Eyepiece selection help!

Started by blueflagella, 12/01/2005 03:56AM
Posted 12/01/2005 03:56AM Opening Post
Hello,
I am finishing up a 12.5" f/5 dob and have a large gap in my eyepiece selection. I have a 22mm T4 nagler and jump to a 35mm panoptic. I can not afford the 26mm nagler and do not want to make my 35mm panoptic obsolete. I was considering the 27mm panoptic, but upon further research realized it shared the same TFOV(1.1'), going from a 71.6x magnification to a 58.3x magnification, and exit pupil difference is 4.4 to 5.4. 22mm to 35mm seems like a large gap, but would I need the 27mm or something comparable to fill it? I also see past threads comparing the 27mm to the 35mm, does this mean most people do not have both panoptics? Please help and any other recommendations are welcome in case I am leaving something out.

Thanks,
Todd
Posted 12/01/2005 07:59AM #1
Todd,
The 27 Pan is a very nice EP, and might suit your current needs. I had one, and loved it, but sold it after buying a 20 T5 Nagler. The FOV was just about the same. That left me a spot to insert the 26 T5 Nagler, which is fantastic. In general, the Naglers are considerably sharper than Panoptics in a faster reflector.
I should mention that I've never owned the 35 Pan, but rather, have a 41 instead. It is just a matter of time before that gets replaced with the 31 Nagler. wink
Linton
Posted 12/03/2005 07:05PM #2
Personally, I don't think the space between the 35 and the 22 is much of a gap. At f5 22mm is a pretty big ext pupil, so the purpose of the 35 is mostly for finding and a few widefield objects like the veil. or M31.

I use the 22 panoptic and 35 mm on my f 5.7 8" (I switched to a 36mm Siebert for balancing issues), and I would like to replace the 22 panoptic with a 20 nagler type 5. Which makes the gap slightly wider than what you are looking at.