That is an unusual scope problem, Jonnes.
I don’t think I’ve ever heard of the Ocular Focus changing the perceived parallax before. I would put this down to a bad lens carrier / bad single unit.
As you’ll probably know Optisan make scopes for a very large number of retailers, retailers who can specify what lenses are fitted etc. but not the basic scope mechanicals (ie; thread pitch on screw-in parts, my only gripe with front AO scopes). It’s possible that those many retailers can specify certain options for their chosen lens mounts but as none of them make any sales pitch around the subject – who knows?
Optisan make excellent scopes, and have done for years – I’m sure your problem is down to one bad unit (Friday Afternoon Scope 😉 ).
In your shoes 🙂 I would go for a Replacement from Optisan.
That is an unusual scope problem, Jonnes.
I don't think I've ever heard of the Ocular Focus changing the perceived parallax before. I would put this down to a bad lens carrier / bad single unit.
As you'll probably know Optisan make scopes for a very large number of retailers, retailers who can specify what lenses are fitted etc. but not the basic scope mechanicals (ie; thread pitch on screw-in parts, my only gripe with front AO scopes). It's possible that those many retailers can specify certain options for their chosen lens mounts but as none of them make any sales pitch around the subject - who knows?
Optisan make excellent scopes, and have done for years - I'm sure your problem is down to one bad unit (Friday Afternoon Scope ;-) ).
In your shoes :-) I would go for a Replacement from Optisan.