New TS binoviewers

[Lady Fraktor]

These look nice, larger prisms for unobstructed viewing using all 1.25" eyepieces, individual diopter adjustment and centering collets.
They have a lot of features making them comparable to the Baader Mk V at 1/3 of the cost.

https://www.teleskop-express.de/shop/pr ... skope.html

[messier 111]

thx .

[JayTee]

I received the Orion Linear BVs for Christmas and have yet to use them. My research put the Orion Linear BVs somewhere between the WO and Baader BVs. I believe the TS BVs fall within this range also. My plan was to use these BVs almost exclusively for planetary/lunar viewing.

I have two Agena SWA 10mm EPs to go with my Orion BVs. I wonder if that is too much power for my C11 @ f/10 or f/6.3?

[Lady Fraktor]

The linears work on a different principle than a standard set of prism BVs though it seems that a lot of people like them.
I have read some people have found they can exaggerate CA/ SA in some fast refractors.

Because you will be using a SCT, the eyepieces will be working at close to their native f/l so you should not have a problem.
With regular BVs a Mak or SC are the only telescopes you do not require a OCA to come to focus.
I would assume that linears should not have issues either.
Mind that is at f/10, I have no idea how well they will operate at f/6.3

[Bigzmey]

From what I read linear BVs are better for lower powers/DSOs and prism BVs are better for high powers/Lunar/planets. It has to do with the fact that linear BVs split exit pupil in half, so each eye gets half-circle exit pupil.

[Lady Fraktor]

From what I read linear BVs are better for lower powers/DSOs and prism BVs are better for high powers/Lunar/planets. It has to do with the fact that linear BVs split exit pupil in half, so each eye gets half-circle exit pupil.

Both style do this just in different ways, I believe the linear does with without using a beam splitter prism.

[Bigzmey]

I received the Orion Linear BVs for Christmas and have yet to use them. My research put the Orion Linear BVs somewhere between the WO and Baader BVs. I believe the TS BVs fall within this range also. My plan was to use these BVs almost exclusively for planetary/lunar viewing.

I have two Agena SWA 10mm EPs to go with my Orion BVs. I wonder if that is too much power for my C11 @ f/10 or f/6.3?

As Gabby said CATs have enough focuser travel to accommodate any type of BVs without need for OCA. The catch is that with BVs you end up with the scope main mirror position different from the "native" position which affects the magnification. That added BVs factor will depend on BV design and diagonal you use.

By testing prism BVs in my SCTs at F10 with Baader T2 prism diagonal I have estimated that BVs added about 30% power. I was still able to use 10mm EPs on Moon and planets no problem.

[Bigzmey]

From what I read linear BVs are better for lower powers/DSOs and prism BVs are better for high powers/Lunar/planets. It has to do with the fact that linear BVs split exit pupil in half, so each eye gets half-circle exit pupil.

Both style do this just in different ways, I believe the linear does with without using a beam splitter prism.

Yes, but with prism BVs when the light split you see circular exit pupils, just each eye gets ~half of the light from the scope, with linear one eye gets left half circle and another eye gets right half circle of the exit pupil.

Here is the illustration.

https://www.cloudynights.com/uploads/mo ... 171263.jpg