classiccameras wrote:You will need to get high end glass to do a full frame sensor justice and even then some edge performance can be less than perfect, I moved over to a Panasonic DMC-FZ330 Bridge, ( no more bag of lenses ) small sensor but the Leica F-2.8 constant Vario Elmerit zoom goes a long way in making up for that. However I still have my little Sony 90v compact for holidays, so I haven't jumped ship completely
Depends a lot on the lens. And of course something like an A99II is going to be harder on the lenses than a lower resolution sensor.
My experience so far is that most of the lenses have held up remarkably well on full frame. What you do notice is more vignetting, which APS-C cuts out due to the crop, edges are corners vary significantly depending on the lens used.
Most of them I had shot on 35mm film so I had a reasonable idea of what was going on. Also worth noting that APS-C 16/24mp is a lot harder on FF lenses in the central area than a 24mp body lower density. Saying that if a lens is holding up on APS-C it's likely to do well on full frame. I think the A99II is 18mp in crop so you get a fairly good idea on the performance in the APS-C area.
You have to be really careful with lens reviews/testing - often people complain about "soft lenses" and the focus can be very slightly off on a tele lens, and weak results. If focus is spot on then you see what's going on. I can only say lenses like the 70-210mm F4 CA aside is sharp at 210mm F4 on APS-C and 35mm with little drop off on edges, some but not very much. The 90/100mm Macro lenses show a lot more vignetting on FF, but are very good across most of the frame. It's just so variable you can't call it as a general thing, most zooms will need to be stopped down for good corners, some to F8 some a bit more, others are quite good at F5.6. Every lens is different. For UWA I'd agree I don't have to stop the 11-16mm down much at all, a FF UWA much more. But I've not used the Zeiss ones on A Mount. Some complain the 24-70mm F2.8 isn't great in the corners even stopped down - I just don't know I've not used/tested it. Then you get sample variation I think I had a mediocre copy of the 24-85mm it was decent but not great, not nearly as good as the 24-105mm (at either end the 24-105mm is sharp stopped down 24mm and good wide open 105mm). That can skew reviews and results so I tread with caution. I've seen several lenses get a bad rap for being poor, and I've not really found that myself, on the reverse some get rave reviews and I'm not been blown away with a few.
Not really decided what to do APS-C if I shoot more action or dabble with wildlife it's probably worth keeping. I was quite deliberate in not buying many crop only lenses with a view to FF later on which has worked out quite well.
Sometimes I miss the simplicity of a bridge camera, and loathe carrying stuff around too
. Solution was to just take less