Thread: Scope for F-Class and a bit of everything else

Originally Posted by Proudkiwi

Tube diameter has zero impact on light transmission, only erector travel.

Glass/lenses and coatings dictate light transmission, nothing else.

To the OP - I believe that NSX scopes are being discontinued in the not so distant future so there may be some deals to be had. Certainly not from the NZ distributor though! If that is the case I would totally agree with Andrew/7mmsaum.

I find that hard to believe, simple physics. Would a 5mm tube allow the same light through as a 50mm? I would think not, it's the same theory as a water pipe, just with photons. Maybe having a bigger tube allows for slightly lower lens quality.