Hello.
This is Bernard from germany :-)

I'm looking forward to buy a ten inch dobsonian telescope. That means a ration of f/5, i.e. 250/1250.

Looking for some eyepieces I found the Antares MER30. It is introduced as a good 30mm eyepiece.

Does anybody know something about it? It seems to be an modified ERFLE eyepiece.

I'm not sure if there could be focussing problems using it with a f/5 newton telescope.

It would be great to hear your critics.

Greeting from germany :-)

PS: The other eyepieces that I want to buy are a 13.4mm Antares Speers Waler and a Antares Speers Waler Zoom 5-8mm. But I don't need information about that eyepieces.