2" EP for 12 " Revelation Dob

[Rapallokid]

Hi,

I am looking for some advise on a 2" eyepiece for a 12" Dobsonian.

I currently have three eyepieces in 1.25 and I use them between the dob and a nexstar 6 se.

They are Celestron excel lx 9mm 24mm and a 26mm plossel. I also use a 2 x celestron barlow.

I wanted to try a 2" EP in the dob to see how they perform. Ideally I am looking at a 30mm + wide view. I dont want to break the bank and was looking at the GSO revelation eyepieces.

Any advise would be greatly appreciated.

RK

[Dodge]

Can't comment on the EP's you mentioned, but I'm fairly local (just north of Witney) and have a SW Nirvana 28mm 82 degree EP you'd be welcome to try one evening.

[rwilkey]

The 32mm PanaView's are also good ep's and good wide sky, big eye lens etc, thoroughly recommended though out of stock at FLO at the mo.

[Rapallokid]

Many thanks for the advise.

[Rapallokid]

Dodge,

I dont know if you are a member of the CNAAG nut I plan on going to their next meeting on the 31st. Maybe if you are there i can take a look.

Thanks again

RK

[PeterW]

depends on the focal ratio of the scope, if it is f5, you want to keep the eyepiece focal length <25mm or so or the exit pupil will get >5mm and so you might lose light as your pupil can't capture it all. You might be better off getting wider field eyepieces that will work with a fast scope (UWAN/Nirvana are reckoned to be pretty good), the wider field of view will look better than the narrower one from a plossl.

Do some calculations for field of view, focal length, exit pupil etc and decide what the maximum focal length you need is. Remember that a shorter focal length with a wider field of view will give the same apparent field of view, but a darker sky background as the magnfication will be higher.

Cheers

PEterW

[Dodge]

Dodge,

I dont know if you are a member of the CNAAG nut I plan on going to their next meeting on the 31st. Maybe if you are there i can take a look.

Thanks again

RK

Sorry mate, didn't see the reply. I'm not a member of that group.

Where in Oxon are you? (PM me if you want to keep it private).

Cheers.