Ts optics 110 deg eps

[triton1]

Just seen on fleabay that Ts are selling a range of 110 deg eps for £279.They look the same as sw myriads which in turn are WO.I thought they where 100 deg or is this a new range and not a typo.They come in fls 3.5,5,9 and 20mm.At that price would they give ethos a run for the money.They also come with 2 inch skirts.

[John]

The 5mm and 3.5mm are 110 degrees while the 9mm and 20mm are 100's. I've had a Myriad 9mm 100 on loan for testing for a while now and a William Optics XWA 9mm and they are identical and rather good

I believe Skywatcher will be bringing out the other focal lengths in the Myriad range soon and I'll hopefully be able to give those a try too.

I think we will see this design under quite a number of brandings in due course.

[triton1]

What are they like to use in a fast scope because at that price it seems hard to resist

Regards Jonn

[John]

The 9mm seems pretty sharp across the field of view in my F/5.3 dobsonian. In faster scopes coma (from the scope) could be the dominant aberration. The eye relief seems a bit tighter than the claimed 13mm, certainly tighter than the 15mm that my Ethos 8mm has and the inflexible eyecup of the Myriad types could become a factor. Not one for those that wear glasses when observing I feel. Very immersive eyepiece though and a lot less expensive than the Ethos too.

[triton1]

Many thx for that John,my scopes f5 and I don,t like coma at the edges but that's me.

[John]

Many thx for that John,my scopes f5 and I don,t like coma at the edges but that's me.

I don't like coma or astigmatism either. It's tough to avoid both at F/5 !

[nicks90]

So that brings up the old debate of super expensive wide field eps, or a quality CC and some mid range wide fields. Would correcting the coma make up for some slight increase in other abherations?