Hi I'm new here
And I'm trying to wrap my head around this topic...
From what I understand, if I put a 25mm Lens (SLR 35mm film) on a MFT-camera (crop-factor 2x) then I get roughly
a field of view of a 50mm lens (SLR 35mm film). Problem is a 25mm will have a very noticeable distortion even though I crop allot out on MFT Body's.
Question: Does a MFT lens like for example the "voiglander 25mm" has a equal "small" Image distortion (almost none visible)
like a 50mm lens (SLR 35mm film)?
Which I'm guessing,if true, could be achieved doe to the shorter flange distance, correct ??
Or is the 25mm from an image distortion equal?
Different Scenario, similar problem:
Comparing here Super35 (cropfactor 1.6) to SLR 35mm full-format in terms of FOV.
Question: Cinema lenses are build with a super35 dimensions in mind. Which does "NOT" cover a full-format sensor ( at least the older lenses).
I'm wondering which of these possibility's is then true:
A: a 50mm lens Build for super35 is = 50mm lens in terms of FOV (SLR 35mm film)
Yes, because the Flange distance is different?
B: a 50mm lens Build for super35 is = 80mm lens in terms of FOV (SLR 35mm film), here is the crop-factor applied.
Answer: Yes, Because "SLR 35mm film" got established first (still cameras) And now everything get's calculated from this base?
Question:If I want a true "SLR 35mm Film" look (Distortion, FOV, BOKEH) Lense: 50mm f/2,
with super35 (APS-C) sensor I would need:
A: 31mm focal-length (31 x 1.6 = 50mm), but with a distortion of a 50mm lens like for Full-frame format (not Wideangle distortion !!!).
B: f/1.4 Aperture. The lens needs to be 1 Stop Faster! Otherwise the Bokeh is only half as Shallow/blurry.
Thx, for any input this is realy frying my brain....
sorry for the mixed up english...
ps.: I'm not interested in what "feels" right. I'm looking for what is optically from a science standpoint right.