I recently lucked out during the purchase of a second-hand enlarger. The fellow selling it included a number of items that was I was not originally expecting. Those items included several lens that I'm looking for info/comparisons on. They include:
Componon-S 50mm f/2.8 (early 90s)
APO Rodagon 90mm f/4 (not "N", early 80s)
Rodagon 105mm f/5.6 (mid 80s)
APO Ronar 150mm f/9 (early 80s)
First, as far as I can tell the Ronar isn't actually an enlarging lens. Does anyone know what the typical application is? It's not big enough to cover 4x5 so is it 6x9?
Next, I'm typically enlarging from 6x4.5. Would the 90 or the 105 be a better bet? The APO lens is slightly older than the non-APO one. Is there any reason to think that the newer, non-APO one would perform better? Ignoring the APO vs non-APO issue, would I notice any difference other than maximum print size between the 105 and the 90?
Lastly, what sort of resources are available for learning about different types of lenses other than bothering strangers on the internet? Are there any books or publications that contain this type of data?