Originally Posted by Kerry L. Thalmann
If you read what I actually wrote, you'll notice I specifically said the 135mm APO Sironar-N doesn't cover 5x7. I never mentioned the 150mm APO Sironar-N.
While the 150mm APO Sironar-N technically covers 5x7, if you want to use movements forget it. 2 - 3mm of front rise is insignificant. Even the 13-17mm of front rise provided by the 150mm APO Sironar-S, as I stated above, was insufficient for my needs on 5x7.
Finally, the 150mm APO Sironmar-S did not replace the 150mm APO Sironar-W. Both lenses coexisited for 5 - 6 years. Perhaps slow sales of the 150mm APO Sironar-W compared to the more popular 150mm APO Sironar-S lead to the eventual discontinuation of the 150mm APO Sironar-W, but it was not replaced by the 150mm APO Sironar-S.