First post as I start my rookie season on CN. I've had the 6SE for several years now and have been impressed with what I've been able to see with it. I'd say my home field is Bortle 5-6 and other than a few pesky sensor lights that randomly go on at both next door neighbors' houses, it can get decently dark in the backyard; especially with all the leaves on the trees now and softball leagues on ice.
I know my scope isn't setting the world on fire from a light gathering perspective, but it's provided some great looks and my goal is to push this thing as far as I can. Early on, I added a 15mm Celestron Luminos eyepiece to the mix and have been very pleased with its performance. It's great on star clusters, galaxy pairs (M81 & M82, M65 & M66) and general probing/sweeping of the Milky Way. But this also represents my highest useful magnification eyepiece for lunar and planetary work and this is the area I'm looking to make strides in this Summer. Frankly, the higher mag eyepieces that came with the 6SE aren't that great and are a bear to look through. After much research, the Televue DeLites sounded ideal for getting to the next level, but it was disheartening to read that for scopes like the 6SE, premium eyepieces don't make a worthwhile difference and that something like basic Plossl's would be the better play. Is this true? Can anyone clear the air on this? I was really excited to get out there with some DeLites this summer, but if they're not a good match for what I have, I'll have to head back to the drawing board.
Many good eyepieces out there.
I'll suggest some focal lengths to look for and why:
Low power, widest field--something with as large an exit pupil as possible and as large a true field as possible.
The obvious choice is a 32mm Plössl, which has the largest field possible in 1.25" and as large an exit pupil for a bright image. About 50x.
Medium power, high acuity, good for general use on all DSOs:
I'd select a 19-20mm eyepiece of around 68° for a nice engaging field size and a most-used eyepiece. Magnification 75-79x.
Higher power for smaller objects and still a low enough power to yield a bright image.
13-14mm, maybe 82° to still have a decent sized true field and be a often-used eyepiece. Magnification 107-115x.
High power for planets, moon, double stars, small DSOs. Yet, still want to keep FOV from being too small.
9-10mm, maybe 82°, magnification 150-167x
That's if you want to have a set of 4 eyepieces to cover the bases.
But since there may be conditions that allow for an even higher power on occasion, I'd suggest a good 2X Barlow lens.
In that case, I'd eliminate the 9-10mm eyepiece and use the Barlow lens on the 19-20mm to yield a 9.5-10mm eyepiece and the 13-14mm eyepiece to yield a 6.5-7mm,
giving you a set of 32mm, 19-20mm, 13-14mm, 9.5-10mm, and 6.5-7mm.
That would cover just about every need you could have.
All eyepieces would be 1.25", as well as the Barlow.
And, with only 3 eyepieces, they could be higher quality eyepieces for high optical performance.
As merely one possible example: 32mm Plössl, 20mm Explore Scientific 68°, 14mm Explore Scientific 82°
A higher end example: 32mm Plössl, 19mm TeleVue Panoptic, 13mm TeleVue Nagler Type 6
There is a huge number of possible collections that could fit here, including TeleVue Delites, and many others.
If you wear glasses and need eye relief, a 21mm Baader Hyperion and a 14mm Baader Morpheus could accompany the 32mm Plössl.
One last note: Why not a 40mm Plössl? The image would be brighter. The true field is the exact same size as the 32mm, but the apparent field you see is quite a bit smaller, at 40°.
That apparent field might be acceptable at extreme high powers, but it tends to make the field appear distant, down a hole, at low power, so I recommend the 32mm instead.
Why not a 24mm 68° eyepiece as a low power. The true field size is the same as a 32mm Plossl, and the apparent field wider. Yes, but the field is darker because of the higher power, and 63x is a bit too high for a low power in a 6" scope.
Hope the ramblings help.
Edited by Starman1, 06 June 2020 - 11:51 AM.