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Tenby2

Helios giant bins

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I have a pair of very much used Helios 20x100 BT binoculars and was wondering if 1 1/4" (31.75mm) eyepieces can be used with some sort of adaptor?

They came with 3 pair of dedicated eyepieces with measure 1 3/8" (35mm)

 

 

 

Mark

Edited by Tenby2
sizes

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I have a pair of OH 20/40 x 100 bins which look the same as the helios. I find that standard 1.25 eyepieces will not go far enough in to get focus.

You might have some success with straight sided 1.25's but they probably will have to be shortened a bit.

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There is a gap of around   2-3mm around the 1 1/4" standard eps. As I said maybe there are reducers of some kind available somewhere. I might email Helios

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If you can reach focus by poking them in the hole then you 3D print some sleeves to do the job better than a wrap of duct tape. If the parts were printed with a little slop then a little bit of duct tape could give a nice snug push fit. I’ve made filter holders and binocular caps like this.

Peter

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