Ext tube for Speers Waler Eyepieces to give more magnification

[AndyH]

Stumbled across this little adapter for the Speers Waler range of eyepieces, including the zooms!!!!

Verlängerungshülse für Speers Waler Okulare - mehr Vergrößerung

Direct quote from the above page

Extension tube for Speers Waler Eyepieces - increases the magnification

The extension tube will be adapted between the 1,25" barrel of the Speers Waler Eyepiece and the body of the eyepiece.

Increases the magnification for about 60%

By increasing the distance of the the eyepiece part next to the telescope to the rest of the eyepiece the focus distance is reduced for about 60 %. Accordingly the magnification raises.

If for an example a Speers Waler 7mm achieves a magnification of 120 times for instance the magnification now raises up to 192times and the eyepiece focal length is reduced to 4,37.

The Speers Waler Zoom 5mm - 8mm becomes a Zoom with a range from 3,12mm - 5mm.

up

Has been a while since I got so excited over a simple piece of kit. Going to the top of my wish list.

Andy.

[John]

Looks like it works on the same principle as the Hyperion Fine Tuning Rings - increases the separation between the top lens groups and the smyth group in the barrel. If it was a variable length extension then I guess you would be able to create a zoom eyepiece of sorts.

I think Meade used to do a variable power barlow lens which worked on a similar principle.

[AndyH]

Thanks for that John. I thought there was a similar device for a range of eyepieces. Couldn't remember which.

Andy.

[AndyH]

Just used sgl's search function and users of the Baader tuning rings, seemed very pleased with the results. Hopefully this device for the Speers Waler range will work just as well. My plan is to use one on my wonderful S-W 5-8mm zoom, for use on my Burgess Fluro. I've been missing my Nagler Zoom, for the higher powers.

Andy.

[Andrew*]

That's cool, Andy. Would make my 8.5-12mm zoom a 5.3-7.5mm.

I reckon the SW zoom eyepieces anyway work on the same principle, so this effectively just increases the length of the eyepiece, and hence the magnification, but without increasing the protrusion from the scope, by the looks of it.

Andrew

[AndyH]

It's very cool Andrew, isn't it.

Defo my next purchase.

I love my zoom a little bit more each time it's used and this opens up some more possibilities for it.

Andy.