How does add affect the corridor (for want of perhaps a better term). We're all aware a +2 add vs a +3 add in a PAL is going to have reduced channel width, does the NAL also experience a similar...
So I've always wondered.... What is up with the W. Wollaston base-curve lens series? It gets mentioned in almost any base curve tutorial without any further satisfactory explanation. You mean to...
Labs have always, “Made as ordered”. You order a 60 pd with 10D of prism, you will (should) get 10D at 60mm. Even in the old days, we never differed from order on high Rx’s unless refracted and worn...
How does add affect the corridor (for want of...
How does add affect the corridor (for want of perhaps a better term). We're all aware a +2 add vs a +3 add in a PAL is going to have reduced channel width, does the NAL also experience a similar...
juno 03-28-2024, 09:47 AM