F6.3 focal reducer for visual

Is the F6.3 focal reducer useful for visual work, or basically a tool for astrophotography? I would be using this on a 10" f10 LX200. Will it cause vignetting on low power, wide field eyepieces (35mm Pan, 40 mm Pentax xl)?

THX

As I wouldn’t say the 6.3 is useless for visual work, It is more applicable to CD and film. The 6.3 wouldn’t (shouldn’t) produce any vegetating provided your eyepiece focal point is within 5" or so of the reducer. I successfully run mine through a 2" flip mirror with a 35mm so you shouldn’t have a problem-- the cone really isn’t that steep – not like a 3.3.

However. its really just a matter of visual reduction if your not using a camera. In theory it should almost double your field of view with your eyepiece. But. in practice 6.3 is never achieved. the Longer the distance the Focal Point is from the reducer, the higher the ratio. e.g. 1"=8.5 2"=7.3 3"=6.9. I've never been able to get to 6.3 even at 5"!

But for turning a 40mm into a (lets say 60mm) that’s really the only use a reducer has in visual work.

Cheers

Bill Russell