Orion Stratus 17mm is a winner!

Here is the place to talk about all those equipment(Telescope, Mounts, Eyepieces, etc...) you have. Not sure which scope/eyepiece is best for you? Trash it out here!
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acc
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Posts: 2577
Joined: Mon Sep 22, 2003 11:15 pm
Favourite scope: Mag1 Instruments 12.5" Portaball

Post by acc »

It has a 2" skirt for convenience. In reality its a 1.25" ep and there is no vignetting since the available focal lengths and 68deg FOV is within the 'capacity' of 1.25" barrels.
We do it in the dark...
Portaball 12.5"
Takahashi Mewlon 210
William Optics 110ED
...and all night long!
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User avatar
acc
Administrator
Posts: 2577
Joined: Mon Sep 22, 2003 11:15 pm
Favourite scope: Mag1 Instruments 12.5" Portaball

Post by acc »

Rather busy so I had a quickie 10min session with the 17mm stratus on my XT10 @ F4.7 The eyepiece held up very well despite the fast f ratio; stars were tight and sharp up to 70% of the FOV. Beyond that, a little coma starts to creep in but only become more slightly pronounced at the last 90%; and its not so bad as to be objectionable. Even Al's Naglers show coma at F5...

On the moon, images were sharp to the edge. I couldnt find fault with the eyepiece.

This is definitely the best value for money ep I have ever seen.
We do it in the dark...
Portaball 12.5"
Takahashi Mewlon 210
William Optics 110ED
...and all night long!
Top
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ariefm71
Posts: 2304
Joined: Wed Jan 28, 2004 4:15 pm
Location: bedok

Post by ariefm71 »

ok, count me in for the 13mm. thanks cc!
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