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Eyepiece help

Started by Nemo, 10/16/2004 06:12PM
Posted 10/16/2004 06:12PM Opening Post
Hello friends,
As some of you may know I am waiting for the delivery of one TMB 115 CNC.(F/7)Although I have an extensive collection of 1.25 eyepieces I have no 2 inch EP's. I just purchased a 2 inch Televue Everbright diagonal. I would now like to start a collection of 2 inch eyepieces for my scope. I am particularly interested in the Televue eyepieces however there is a large assortment of them and I really could use a bit of advice. I would like to start out with an eyepiece that will give me the best detailed views of DSO's and Messier objects. I am looking for a balance between edge of field clarity (as much as can be had with out FF.)and wide field. I guess what I am trying to say is there an eyepiece that has the sweet spot for looking at DSO's and Messier objects that balances power versus field of view for this scope. I would like this eyepiece to be my first purchase and then go from there. If anyone out there would like to share with me some kind of list starting with the above described EP qualities I would be most appreciative. Another way to look at this request would be if you could only have one eyepiece for viewing the objects I have expressed interest in what would it be.
Money is not a consideration here. I am not looking for the best buy just the best EP in the Televue line.
Thanks for taking the time to read this.
R/S,
Dan

Danny Halstead
Moderator APM Forum
Posted 10/16/2004 07:17PM #1
For the TV line the Best for DSO is probably the Nagler because of the FOV and edge correction.
31mm = 20x. $530
26mm = 30x. $490
22mm = 37x $390
20mm = 40x $370
17mm = 47x $330
You can see that with you scope the magnification is very clse between f/ls in the set.
I would think the 17mm with the 26mm would be the optimum for you.
The 31mm would just be too low of power to be useful. The 26mm at 30x might still be a bit low but the FOV would be a great big sky look.
Yuou could probably get by with just one of these really.
My 31mm gives me 49x, 61x and 66x in my three scope and it is a nice low power look. I like the 20mm in my scopes too and that is 76x, 95x and 101x.
Now I find the 31mm in my 12.5" at 49x to be a great view. Orion, Lagoon, M31 and many other larger objects are frames very nicely with good detail with this power. That is why I think the 17mm would be a good one for you. I do not have any EPs that give me less than this power, so I am not sure what it would be like. However I have looked though Binoculars that are in the 15x, 20x and 35x range and the lower power ones are only good for very large objects and general wide field looks. at 30x, most DSOs ar very small indeed.
Hope this helps.
Floyd

[SIZE="Large"][/SIZE][COLOR="Blue"][/COLOR] Floyd Blue grin
Amateur Imager
Posted 10/16/2004 10:47PM | Edited 10/16/2004 10:51PM #2
I personally would go with a 35 Panoptic (just a hair under 3 degrees @23X and 5mm exit pupil) and the 17 T4 Nagler (1.74 degrees@ 47X). Both of these are really sweet in a small refractor like yours.