Hey Dan, I'd hardly call investing in good EP's "needless", but I'll offer this from my own experience...
I can't imagine having only one EP, but if I absolutely had to make that choice, I think I'd probably go with a 20mm Nagler T5. 20mm is what I'd call the sweet spot on your SCT. Assuming you've got 2000mm f/10, like my LX-90, that'll give you 100x at .8 degree FOV and a 2mm exit pupil. That's a pretty good compromise between power and FOV, I think.
But I'd supplement that with a 14mm UWA (4000) for 156x at .6 degree FOV and a 41mm Panoptic for 41x 1.3 degree "wide field" FOV.
That's what I used for a long time, except that I had an 8.8 UWA too, which provides 227x at .4 degree, on nights where the seeing will permit it. But those three met most of my needs.
Have fun!
Linton
I can't imagine having only one EP, but if I absolutely had to make that choice, I think I'd probably go with a 20mm Nagler T5. 20mm is what I'd call the sweet spot on your SCT. Assuming you've got 2000mm f/10, like my LX-90, that'll give you 100x at .8 degree FOV and a 2mm exit pupil. That's a pretty good compromise between power and FOV, I think.
But I'd supplement that with a 14mm UWA (4000) for 156x at .6 degree FOV and a 41mm Panoptic for 41x 1.3 degree "wide field" FOV.
That's what I used for a long time, except that I had an 8.8 UWA too, which provides 227x at .4 degree, on nights where the seeing will permit it. But those three met most of my needs.
Have fun!
Linton
