Hi,
I use spectacles for driving and watching tv (a small but noticeable correction).
When I use a scope or bins (with a bit of dioptre adjustment) I get a clear image over long distances... How can this make sense ? Is there a risk of eye strain in doing this, or should I be using bins/scope with my spectacles on (and LER lenses). I don't feel any strain so presumably I can keep doing what I am doing (using optics without my spectacles on) and there is no risk of decreasing my eyesight. So, what's the big deal about long eye relief and ads which say that Binocular X or Scope eyepiece Y has LER and is designed for spectacles users ??
thanks for info
cheers
Niall
Hi Niall,
Perfectly OK. By adjusting the focus to what suits you, the lenses in the scope are acting as both specs and magnifier. It just means that if anyone else has a look through your scope, they'll have to change the focus to suit their eye. Also if you take up digiscoping, and use the same focus setting, all your pics will come out blurred.
The only reasons that a lot of people like to keep their specs on while birding, are that (a) their eyesight may be so poor they are unable to see what they're trying to aim their optics at, and (b) taking specs off wastes time and you might miss a bird while putting them away (or get the specs lost or damaged in the haste of putting them away quickly)
Michael
I agree with everything Michael says. As a specs wearer myself I always keep them on and use my bins/scope with them. I am quite short sighted and couldn't comtemplate finding a bird with glasses on and then taking them off to use bins etc.
As far as dioptre goes it depends on the difference between your 2 eyes. If there is little or no difference then you will not need to use it.