Posted 30 October 2005 - 07:01 PM
Does anyone have an experience with the Moonfish eyepieces? I need some new eyepieces and judging by the good review and the fact it only costs £59 I might be interested in acquiring one.
Posted 31 October 2005 - 02:41 AM
Posted 03 November 2005 - 03:49 PM
Posted 05 November 2005 - 08:27 AM
Nice coatings, and seems well made. Can't wait to try it out soon...
Here it is with a Meade 32mm Plossl for comparison.
Posted 05 November 2005 - 06:38 PM
I also have the GSO 42mm and GSO 30mm Superview 2" eyepieces. The 42mm has a field of 55 degrees, and the 30mm 65 I think. I like both and use them a lot in my f6 Dob and f7 TV85. I had calculated that the 30mm Moonfish would give the magnification of the 30SV and the True Field of the 42SV.
So I took all three out tonight with the 8" f6 Dob, and guess what- it was true! I compared the views of the Pleiades, M36, 37 and 38 in Auriga, and a couple of clusters that I hadn't viewed before and don't know the names of.
The eyepiece gave sharp views, and the edge correction was much better than I expected. It was way better than the 30mm Superview, with good starpoints out to about 85% of the field, as opposed to about 75% in the Superview. But of course the field is that much wider as well, so even better! The true field was indeed the same or slightly larger than in the 42mm Superview, and the higher magnification made the nebulosity in M45, or stars at the edge of clusters, stand out quite a bit more easily.
I really think it has made the 42mm Superview redundant. And probably my 30mm as well! At one point I nearly let go of the tube and just about fell headlong into the middle of the Pleiades! Spacewalk? You bet. :
Posted 05 November 2005 - 09:32 PM
I need to consider this EP for my F6 dob. Is is only available off ebay?
Posted 07 November 2005 - 08:50 AM
The field stops are at 12.4 mm (10mm EP), 18.6mm (15mm EP) & 24.8 mm (25mm EP). I'm getting my first scope (after 2 years I have astronomy as hobby), a Skyliner 200 (8" Dob) and the eye pieces (along with filters) are my nightmare who will push my budget to the limits.
Posted 09 November 2005 - 02:29 PM
Posted 09 November 2005 - 08:52 PM
Posted 10 November 2005 - 07:44 AM
I read somewhere that this eyepiece comes off the same assembly line as the 1rpd, but can't find it again just now...
Posted 10 November 2005 - 10:34 AM
Posted 10 November 2005 - 11:43 AM
The 70 degree versus 80 degree confusion arises often: The 30mm Superview eyepiece (a completely different eyepiece entirely, from the GSO factory) is about 70 degrees afov, and tends to edge perform better at less than f/6. The 30mm Ultrawide is happier at f/6 and upwards. Both are quality/cost bargains of some repute, and we just happen to sell both under our own brand. But hold them in your hand, and there's no mistaking the difference; the Ultrawide is built like a tank, and you'd regret dropping it on your foot, while the Superview feels much more like a standard 2" eyepiece.
Hope that helps,
Posted 10 November 2005 - 11:52 AM
Let us know how the EP works out for you.
Posted 10 November 2005 - 12:18 PM
Posted 11 November 2005 - 12:53 AM
The 30mm Superview eyepiece (a completely different eyepiece entirely, from the GSO factory) is about 70 degrees afov, and tends to edge perform better at less than f/6. The 30mm Ultrawide is happier at f/6 and upwards. Both are quality/cost bargains of some repute, and we just happen to sell both under our own brand.
Thanks for chiming in, Ric. But just for clarification, when you say, "The 30mm Ultrawide is happier at f/6 and upwards", are you saying that the 30mm UWA is better or worse in fast (short focal length) scopes than the GSO Superviews?
Posted 11 November 2005 - 01:51 AM
Now here in Europe these things happen to be branded Moonfish, but our USA cousins can also learn a lot from what I said, as these GSO Superviews and 1rpd eyepieces are available over on your side of the Atlantic from a variety of sources. I'm not aware of any one source that sells both of these eyepieces over there, so I've never heard of the direct comparison being made before.
Posted 11 November 2005 - 08:15 AM