The 10x20 IS model. (1 Viewer)

[Pepitogrillo]

Hello,
I Don't see too much reviews of this 10x20IS model... Why?
Someone know .... this theme?
PG

 

[Hermann]

The exit pupil is too small for any serious use.

Hermann

 

[[email protected]]

Eeegh. The Canon 10x20 IS a little finicky with a 2 mm EP, but it is better than you think it would be. The IS helps keep the EP centered over your eyes because it is steadier. It ain't no 8x42, though, that is for sure.

 

[Pepitogrillo]

Well when we use an 80mm spotting scope with 40x are we using 2mm exit pupils?
And this with only one eye!!

 

[Binastro]

Actually a binocular is more difficult with 2mm exit pupils as IPD must be perfect.

Personally, I have no problem with 1.5mm exit pupils with hand held binoculars or 0.4mm exit pupils with a mounted scope.

Regards,
B.

 

[[email protected]]

Well when we use an 80mm spotting scope with 40x are we using 2mm exit pupils?
And this with only one eye!!

Yes, but it is on a tripod! It is easier to keep the EP centered over your cornea when it doesn't move.

 

[Pepitogrillo]

But then the problem is the EP centered no the pupil éxit...!?

 

[Hermann]

Pepitogrillo: You have to keep the entrance pupil of the eye centred in the exit pupil of the binocular/scope. If the exit pupil becomes smaller, e.g. 2mm, this becomes more difficult.

For inexperienced observers this may already be difficult with a scope on a tripod. However, it's considerably more difficult with a binocular, because you have to keep the entrance pupil of both eyes aligned with the two exit pupils of the binocular.

That's the reason why many people prefer binocular with large exit pupils. Even with 8x20 binoculars that can be quite difficult. With 10x20 binoculars with their even smaller exit pupil it becomes even more difficult.

Hermann

 

[Pepitogrillo]

Thanks for all replies...
very interesting..... 10x20 is a model curious!! But with 2mm...mmmm