Eyepieces for 10" Dobsonian
Posted 02 January 2013 - 10:11 PM
By optimized, I'd really like some thoughts on what Dob eyepieces you find most enjoyable in all respects - not just viewing, but also the holistic experience, including the small details of machining quality, feel, grip, lens cover fit, and just overall satisfaction.
I have currently: Z 2" Plossl 36, 1.25" Nagler T6 13, 2" ES 9/100. I enjoy them all. I use the big Plossl as a finder, spend most time with the Nagler, and then typically finish up with the ES 100, but tend to get worn out with the big image and hazier image quality at high mag.
TV definitely has the best machined "quality feel" to it - sort of like the shifter on a Ferrari (not that I've driven one). But there is satisfaction in just the quality feel of the EP, and that's what I'm after. I am wondering if anyone uses TV plossls still, and whether you get the same sense of satisfaction and quality, or whether wide field fanaticism overshadows these factors.
I also have a 1.25" ES 24 on order. I would have loved a Panoptic but couldnt afford it.
Also, I'd be grateful if anyone has a primer on filters useful for city viewing of nebulas, other DSOs, moon, and planets.
I know it's a bunch of questions here, but I'd be grateful for your input.
Posted 03 January 2013 - 06:21 AM
- I like Naglers, the ES-100s are supposed to be good. You need some eyepieces lower power eyepieces. Plossls are fine eyepieces but the narrow field of view is not "Ferrari-like." Something around 20mm would be nice, it could be a 68 degree eyepiece, an 82degree eyepiece or even a 100 degree eyepiece. If it were a 100degree eyepiece, namely the ES-100, then it would cover your low power needs quite nicely.
Otherwise, in your situation, I would want something with a wider field of view than the 36mm Plossl. It's at the lowest powers where the widefields come to life. Ideally, it would be 31mm Nagler but there are a number of more affordable eyepieces that also provide good, wide views.
As far as filters go, there is a nice thread in the beginners forum...
Nebula Filter Ideas
Posted 03 January 2013 - 07:38 AM
What would you recommend the lowest power eyepiece be? Do you worry about exit pupil?
Posted 03 January 2013 - 08:42 AM
Posted 03 January 2013 - 08:46 AM
Posted 03 January 2013 - 01:52 PM
Posted 04 January 2013 - 08:57 AM
Posted 04 January 2013 - 04:57 PM
Posted 08 January 2013 - 11:40 PM
Admittedly no match for TeleVue Naglers, I recently purchase the Meade Series 5000 HD-60 eyepiece set, which includes 25mm, 18mm, 12mm, 9mm, 6.5mm and 4.5mm. The AVOF is 60 degrees; and the eye relief is between 17 and 20mm (actually better on average than TV Plossls). These work well even without any comma correction. As for the overall impression of the 5000 Series, I am very impressed with the look and feel of their construction as well as with their performance on all sorts of objects, including planets, solar, lunar and DSO's. A little known, mostly undocumented, fact about these eyepieces is that they have a built-in, fully adjustable tele-extender (1 centimeter range).
As for filters, I also live close to a big city and suffer from light pollution; so I find quality filters are helpful. Though no filter in the city can compare to getting out in the country a good 30 to 50 miles (when time allows)! But, if you must get DSO filters, I say consider saving up and getting Baader Planetarium series. For the most part, you get what you pay for when it comes to filters. There are some great in-depth posts on filters here at Cloudy Nights!
Now back to your first question about EP's optimized for your scope: I would say that when it comes to wider AFOV eyepieces (over 60 degrees), comma is much more apparent regardless of which eyepieces you go with but especially with super and ultra-wide field (70+ degrees). Comma generally begs correcting in focal lengths shorter than F6 in my experience. I believe that you will want to invest in a comma corrector to get the most out of an 82 degree eyepiece. I purchased a GSO 2 inch comma corrector for about $120 and and very pleased with it. The quality is impressive considering the price. It is a bit heavy. I had to reconfigure the OTA balance, which was relatively easy on my scope.
I hope my two cents worth holds some value for you.