Wild M400 or M420: which 3rd party 10x eyepiece

[zzffnn]

What is a good 3rd party 10x eyepiece for Wild M400 or M420, please? I prefer good parfocality (doesn’t have to be perfect) on M400/M420 and field number of close to 25mm. Would most focusable finite eyepieces work? Thank you.

[Milou]

You can get chinese eyepieces sold at low cost and which are good especially the ones adapted for people wearing spectacles

[zzffnn]

Thank you, Milou. But I only saw Chinese EPs with FN22 or FN23. I would like FN25 or even FN26.5 AND parfocality.

Do you think all focusable 10x EPs will achieve good parfocality on Wild M400 / M400?

[Milou]

I don't know on this M420, but for many other Wild stereo microscopes, like M serie and other compound microscopes, they work perfectly well.
I also made test with my Wild M8 and they are better then the original old Wild eyepieces!

[Scarodactyl]

They do not tend to be parfocal on Wild scopes, which have an unusually low pickup point. I have had success with Chinese 23mm 10x/22 eyepieces on Wild stereos but iirc it didn't work on an m450 for some reason. It might be worth revisiting since once they're on a 30mm body you get a 25mm fov or so.