Need help on eyepieces

[Junming-jm]

Im dreaming\wanting to buy a taka fsa 102mm apo scope and I cant decide\dream which focal lenght of televue eyepiece to buy so I need help now ty. Err the purpose of the eyepieces is searching star , dso and planetary, one each of type . Detail of the scope :apo , triplet ,refractor , 816 mm focal lenght and 102mm aperture.

[Canopus Lim]

Will this be your first scope? I think before deciding on the eyepiece, one needs to decide on the scope first.

There are a few things you need to consider about the scope:
1. transportability (very important...if you drive, not too big an issue)
2. Aperture size. For DSOs and planets, generally bigger is better (if good quality optics). In spore, if you want to observe DSO, I feel it is better to have a larger aperture than 4". 4" is really limited.
3. Cost. If this is your first scope and if you are very new to the hobby, I would think it is better to buy a cheaper scope first to try out. The TSA102 is a very expensive scope and I feel it is better suited to one who is pretty experience and know the limitation of a 4" scope.

For eyepieces,
Again it depends on the scope. If you use high f ratio scopes, cheaper eyepieces will do. You need not have to buy a Nagler if the scope is like f/8. Also the focal length of the eyepiece is very important and also depends on what you want to observe. For singapore, we are pretty limited to just observing stars, open clusters, globular clusters and planet/moon. It is better to use short focal length eyepieces (higher magnification) to see more stars and better details on the planets.

[rlow]

Excellent scope! I wished I had that buying power when I was your age...

What's your budget for eyepieces? Here's my suggestion based on your criteria:

A. Big budget: Nagler 31mm, Ethos 8mm, Powermate 2x
B. Small budget: TV Plossl 32mm, TV Plossl 8mm, TV 2x barlow

[Junming-jm]

Will this be your first scope? I think before deciding on the eyepiece, one needs to decide on the scope first.

There are a few things you need to consider about the scope:
1. transportability (very important...if you drive, not too big an issue)
2. Aperture size. For DSOs and planets, generally bigger is better (if good quality optics). In spore, if you want to observe DSO, I feel it is better to have a larger aperture than 4". 4" is really limited.
3. Cost. If this is your first scope and if you are very new to the hobby, I would think it is better to buy a cheaper scope first to try out. The TSA102 is a very expensive scope and I feel it is better suited to one who is pretty experience and know the limitation of a 4" scope.

For eyepieces,
Again it depends on the scope. If you use high f ratio scopes, cheaper eyepieces will do. You need not have to buy a Nagler if the scope is like f/8. Also the focal length of the eyepiece is very important and also depends on what you want to observe. For singapore, we are pretty limited to just observing stars, open clusters, globular clusters and planet/moon. It is better to use short focal length eyepieces (higher magnification) to see more stars and better details on the planets.

The problem is 8 inches newtonian all tend to be heavy and set up time long .

[Junming-jm]

Excellent scope! I wished I had that buying power when I was your age...

What's your budget for eyepieces? Here's my suggestion based on your criteria:

A. Big budget: Nagler 31mm, Ethos 8mm, Powermate 2x
B. Small budget: TV Plossl 32mm, TV Plossl 8mm, TV 2x barlow

Wanted to go ns then buy that why I put wanting / dreaming .

[rlow]

Will this be your first scope? I think before deciding on the eyepiece, one needs to decide on the scope first.

The problem is 8 inches newtonian all tend to be heavy and set up time long .

Then consider the Orion Starblast 6" f/5 which is lighter and don't need to setup. Laser collimation check requires only 1-3 mins.

[VinSnr]

Im dreaming\wanting to buy a taka fsa 102mm apo scope and I cant decide\dream which focal lenght of televue eyepiece to buy so I need help now ty. Err the purpose of the eyepieces is searching star , dso and planetary, one each of type . Detail of the scope :apo , triplet ,refractor , 816 mm focal lenght and 102mm aperture.

do you first know what to expect from the images shown through the 102?

[Gary]

Hi Junming. Welcome to Singastro. A few questions:

- Can you list the model of the telescopes have you seen through so far via private sessions or star parties?
- What eyepieces were used for such telescopes?
- What objects have you seen through using each model of these telescopes and what are your views on them?

[fizzy123]

Hi Junming,

Do check up more scopes of different design and optical qualities, then make a wise educated decision. Btw, are you the guy we meet at the Toa payoh moon cake festival obs session, at the Toa Payoh kopitiam with our dear presdient?

[Junming-jm]

our dear presdient?

lol hopefully jin peng saw this . Anyway Ya . Err I talk with mooey about the previous telescope,uti 8inches, im wanting to get . He said that it is heavy and the long time you gonna set up the telescope . So I decided to buy that refractor and I remember the person with mct at the festival said that his 5 inches is enough to show him some dso.so I tot a
4 inch refractor shall be enough . I also have another thought was it is pointless to Buy a average optic then sell it again and Buy a premium optic . Why not Buy a premium optic in one short.