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Binoview EP's options


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Just now, JeremyS said:

I haven’t Mark. I note they are quite short FL. Many ppl, including myself, find it more comfortable  to get high mags using longer FL eyepieces (which generally have better ER) with a Barlow (or GPC) in front of the binoviewer. 

Ahh, ok Jeremy thanks :)

I haven't used Binoviewers before 🤔

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54 minutes ago, callisto said:

Hi all,

Don't mean to hi jack the thread...has anyone used a pair of these in a Binoviewer? 

https://www.firstlightoptics.com/skywatcher-eyepieces/skywatcher-uwa-planetary-eyepieces.html

 

Mark :)

Merging high power eyepiece views can be problematic because they can expose any slight collimation issues in the binoviewer.  I do as Jeremy suggests above, use low power eyepieces with a Barlow element out front of the BV.  Since I end up operating at 3x or about f/18, just about any wide field eyepiece looks great.

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2 hours ago, JeremyS said:

I haven’t Mark. I note they are quite short FL. Many ppl, including myself, find it more comfortable  to get high mags using longer FL eyepieces (which generally have better ER) with a Barlow (or GPC) in front of the binoviewer. 

In this case, all focal lengths have a long eye relief, so there is no disadvantage to the short focal lengths.

Note that almost all binoviewers have a magnifying nosepiece on the front end, so a 10mm eyepiece might be operating as a 5mm eyepiece in the binoviewers.

Hence, very short focal lengths might not be necessary.

Edited by Don Pensack
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