Dear Henry,
You asked in the link how the Elite 10 x 42P focusses.
It focusses via a large aperture multicoated element behind the objective.
As you focus closer the separation of the objective and focussing element closes, i.e. the gap narrows.
There are quite a few knife edge baffles but I don't see how they can be optimum for every focussed distance.
I still cannot make out whether the objectives are triplets or doublets or even 4 element.
Elsewhere in the link it say that the eyepiece end moves, after partial dismantling.
If so it means both the objective end and the eyepiece end moves.
I have not heard of such an arrangement but it could exist.
The focussing travel of the inner lens is quite large for a close focus of 5 metres, 16 ft for me.
So it may be quite a weak element, although this is a guess on my part.
You asked in the link how the Elite 10 x 42P focusses.
It focusses via a large aperture multicoated element behind the objective.
As you focus closer the separation of the objective and focussing element closes, i.e. the gap narrows.
There are quite a few knife edge baffles but I don't see how they can be optimum for every focussed distance.
I still cannot make out whether the objectives are triplets or doublets or even 4 element.
Elsewhere in the link it say that the eyepiece end moves, after partial dismantling.
If so it means both the objective end and the eyepiece end moves.
I have not heard of such an arrangement but it could exist.
The focussing travel of the inner lens is quite large for a close focus of 5 metres, 16 ft for me.
So it may be quite a weak element, although this is a guess on my part.
Last edited: