Geoff D F Offline Upload & Sell: Off
|
gear-nut wrote:
The other thing we should probably spell out in the Fx vs APS-c debate is what the actual IQ "losses" are.
Lens sharpness. First off, virtually any newer design lens is better than the same thing from 5-7 years ago. However, the difference is not necessarily Earth-shattering. Lens resolution does not degrade from perfect to unusable at a hard stop, rather it's a gradual fall-off. As an example, in the Fuji APS-c line, the 55-200 is arguably the worst zoom option, yet I still carry one for travel because it's more than "good enough" for when I want that extra range AND it doesn't take up much room or add much weight (or cost) to your bag. It's plenty sharp centrally and only visibly softens at the corners, which usually aren't all that important when I'm zoomed out. (If I thought extreme corners at max focal were going to be a problem, I'd carry the 50-140 or 100-400 instead -- but neither one is nearly as travel friendly as the 55-200.)
(Side-bar comment here: The Fuji 55-200 is "as good as" any Fx 75-300 I've seen; there won't be a spits worth of difference between an Fx image made with a 75-300 and the APS-c image made with the 55-200 at any MP count even compared side-by-side at 100%. In fact, comparing either at use sizes to the best 70-200 option, you won't see a startling difference centrally between them and only barely noticeable at the corners. Zoom into 100% and sure, you'll see the marginal losses -- but are they critical losses for your imaging, or possibly a gain? To wit, there is a prominent wedding photographer I know that uses the 75-300 on his Fx cam as his mainstay for weddings. Why? Precisely because it isn't quite as clinical as newer options and works beautifully for people. Think of adding the weakest black-mist filter to your sharpest lens, and that's about where these "weakest" zooms hit.)
Noise. Net loss in noise from Fuji XH2 to my Nikon Z9 is maybe 1 stop. If noise is a big deal for you, then decide if carrying the added weight is worth it to you. Noise does not bother me much, in fact I sometimes like it some of my night shots, YMMV.
DoF. There's about a 1-stop difference for DoF between APS-c and Fx. If you need f1.4 a lot in Fx, then you're going to want f1.0 in APS-c for a similar look -- and there aren't many (none) AF f1 lens options for APS-c... The however-but flip-side to this is that you also gain back the stop of DoF with APS-c at any aperture, so you can shoot APS-c at f2.8 when you stopped down to f4 for Fx, gaining back 1 stop of shutter speed or ISO. This happens to be a significant benefit for my street/travel/lifestyle shooting, maybe yours too... ...Show more →
Couldn't agree more. These are the reasons I moved back to primarily shooting APS-C after a decade of shooting FF. It slowly dawned on me that the supposed benefits of FF didn't materialise in practice for any of my use cases - I can't see a difference on a 28 inch 4k screen (which displays around 8mp) and I can print up to 120cm, without seeing a difference. Further, it is rare that one stop of noise performance makes much of a difference. More often if there is not enough light, then there is not enough for FF too.
|