"Indianaradio" wrote in message
...

I need to buy a couple (2) eyepieces for a new scope I just ordered. It's
an 8"
1200FL Dob.

Possibility...... (select the two that best fit your needs)

200mm F6 Telescope:
----------------------
Wide field/finding/general purpose:
24mm Panoptic (4mm exit pupil at 50x; 1.4 degrees tfov )

Open clusters/general purpose:
13mm Nagler Type 6 (2.2mm exit pupil at 92x; 0.9 degrees tfov )

Globulars/Galaxies/Doubles:
9mm Nagler Type 6 (1.5mm exit pupil at 133x; 0.6 degrees tfov )

A mix of the above and the below:
7mm Nagler Type 6 (1.2mm exit pupil at 171x; 0.47 degrees tfov)

Doubles/Planets/Planetary Nebulae/Some Globulars/Some Galaxies:
6mm Radian (1.0 mm exit pupil at 200x; 0.3 degrees tfov)

Planets/Doubles:
5mm Radian (0.8mm exit pupil at 240x; 0.25 degrees tfov)
5mm Nagler T6 (same as Radian only 0.34 degrees tfov)

Radians also have 20mm eye relief across the line, which is more important
to some observers than others. The NT6s have 12mm across the line.

If they would be my _only_ two eyepieces, then personally I'd go with the
24mm Panoptic and the 9mm Nagler. Since you have the barlow, that gives you
50x, 100x, 133x, and 266x. Although that leaves a huge gap between 133x and
266x, that's begging for the 6mm Radian.

Alternatively, the 25mm Plossls that come with most scopes aren't really
"bad", so you might go with a 13mm and 7mm Nagler (or something else in thes
focal lengths. For example, the Ultima series from Celestron, or the Orion
Ultrascopics are a cut above the Plossl, and quite good at 12.5 and 7.5mm,
but with only a 50 degree afov, they are a touch narrow for a Dob user).

But don't just listen to me... there's a lot of information, opinion, and
personal experience to consider. Try before you buy is what they say,
although I've never heard a real complaint about the TeleVue line, except
for the price from those who really don't want to spend that much. But I
don't think you'll find used ones staying on Astromart for very long either,
and at a large portion of there original price.

-Stephen