I played around a bit this morning
I played around a bit this morning
specifically to try to address my own similar findings as Dave and the OP.
with the RD1, and 28 Biogon, I can frame straight on to a window from a meter away and the resulting image is not that different than a 35.
But if I start taking photos at angles with the film/sensor plane non parallel to the window, I get some of the "wide" effect, even though the "effective" fl is similar to a 35.
In addition to the above wide angle lens "spatial relationship" effect, I think there could be other things going on, for example, if the phenomenon is specific to RF's and not film and crop DSLRs, then perhaps it is the VF window area that covers more than the lines for a particular lens (still lots of space with the 28 beyond the lines on the RD1.
That's why I think a test with the wider portion of "normal" and longer portion of "normal" is interesting to me because between 35 and 75 I can use them interchangeably on FF and 1.5 crop, but when I go to 28, the 28 is always a "wide angle".
Would be interesting if someone with a 4/3 system with various lenses could weigh in, as this has a 2x crop factor.
Did I mention the benefits of the 35/2 cron asph and it's lack of "wide" issues yet??
😀
Simply place a 21 on the M8 get close to a subject and snap away. It will appear really clear that the lens on the camera is a "21" that is being cropped. It is considerably less obvious (but still apparent) that the 28 is a wide. The wider lenses really illustrate Erik's question/point.
As for your question Raid...whose to say optically superior? It is a great lens and a joy to use (small and compact) and handles like a little Summicron 35....somewhere between the 4th gen and the asph. which is a good place to land.
David