Just to throw in my two cents there are a few important factors to consider, such as how much blurring you want or expect at what distances and focal lengths. It's always 2x for MFT, with regards to 135-format, unless you crop it more, of course ) Some of my Leica lenses have 12-18 (!!) blades.Īctual, physical focal length and distance-to-subject will determine your depth of field, and crop factor will determine your angle of view. The more blades, the closer you can approximate a perfect circle. This affects how your out-of-focus areas are rendered.
If anyone's got portrait shots at f/2.8 shot with a MFT camera (crop factor is always x2 I guess?), then please post it here (or a link).īecause when you stop down a lens with an adjustable iris, your aperture is no longer perfectly round. That the 6 or 7 blades of a dslr will give less beautiful bokeh is something I didn't know. Was shot with that 12-40mm lens, at f/2.8, on the E-M5 and i'm pretty sure I wouldn't be able to do that on f/5.6(!) with my 24-70 f/2.8 zoom. On the other hand, this blogger claims that : bit.ly/1R8AXGc I just don't see myself shooting MF again, certainly not with a fast moving target like my little daughter around :). Yeah it's confusing, I've seen Voigtländer photos shot at f/0.95 that come really, really close to what I do with my ff dslr at 35mm f/1.8, so it appears the numbers are right.
One thing that equivalency discussions often fail to mention is that stopped down to f/5.6, a Nikon or Canon lens with a 6 or 7 bladed aperture will look less smooth in the out-of-focus areas, than an Olympus f/2.8 lens which is being shot wide-open.Īnd, for what it's worth, the 45mm f/1.8 is probably the best bang-for-the buck portrait lens for the system, and would be more suitable for the task than the generalist 12-40 zoom. (I spend a good amount of time shooting medium format, for instance, and I never bother converting to and from the smaller 135 "full frame") I think of it rather as a 12-40mm lens, at f/2.8, with a narrower angle of view, which is the most accurate way of describing it, and does away with things like equivalency conversions, etc. Sure, if you want to interpret that theory that way. PIXistenz edited this topic 93 months ago. Originally posted at 5:52AM, 26 November 2015 PDT This means that the lens would rather be f/5.6 in a 35mm equivalent when shooting portraits.
There's just one thing I'm not sure about : I love the occasional bokeh or blurry background when shooting people, but I've read that you need to multiply the aperture with the crop factor regarding to bokeh (not regarding to the exposure (light or speed). I'm thinking of buying this combo: OLYMPUS OM-D E-M5 II + 12-40mm f/2.8 EZ PRO
0 kommentar(er)
