Are the Olympus Pro primes the finest lens being produced now ?

Started 1 month ago | Discussions thread
bobn2 Forum Pro • Posts: 65,594
Re: Are the Olympus Pro primes the finest lens being produced now ?

Carol T wrote:

bobn2 wrote:

Ruairi wrote:

bobn2 wrote:

Ruairi wrote:

So one lens produces sharp images across the frame, and one doesn't. But the less sharp lens is sharper? Crazy world.

Ever heard of 'levelling down'. Fact remains, the Sony is sharper at the edges than the Olympus, then it gets much sharper, whilst the Olympus doesn't.

Sounds like the results you shared vary depending on sensor resolution, and doesn't account for the relative value either lens adds to the camera - which is what I'd be interested in when rating a lens.

That's a problem with almost all the lens tests. Still, it's a problem that people like to have either way, depending on whether it will suit their argument or not. When someoen producs a high MP camera, they'll say 'but there are no lenses good enough', and when a high MP camera shows their favourite lens not doing so well, then they say 'but that's down to a high resolution camera'. Roger Cicala's tests don't depend on the camera. Unfortunately he doesn't do enough to always find direct comparisons, but if you allow a 'bracket'...

Heres's the Olympus 25/1.2

Sony 35/1.8

Sony 85/1.8

Now remember, because it's going to be enlarged twice as much, to match the Olympus has to show the same or better contrast at double the resolution, that is, the Olympus orange line must be above the Sony red line, and the Olympus blue line must be above the Sony orange line. It doesn't even come close. In fact, in the centre it can't even match the absolute sharpness of the Sony.

Presumably the Sony lens inhibits what an E mount camera can resolve to a higher degree than the Olympus lens will a m43 camera.

Another 'levelling down' argument. And it's wrong to boot.

OT, but wow, that Sony 35 goes really south really fast halfway to the edge, at all but the lower frequency. And looks like it has a lot of astigmatism?

Both things are the case, but the problem the Olympus has is still that it doesn't get close. If you look at the red line on the Sony, which is the one that the orange line of the Olympus has to match, at the edge that's about 0,85 both sag and tan. The Olympus orange line is about 0,79 sag and 0.69 tan. The  you look at the orange line on the Sony, which the blue line on the Olympus has to match, at the edge it's 0.63/0.67 whilst the Olympus on the blue line is 0.48/0,48. So whilst the Sony is in some senses not as well 'corrected', it's another case of levelling down. Actually, I was surprised how low the Olympus' contrast is in general. It really doesn't get above 0.92 anywhere.

Still, if I were buying into a FF system right now, it would be the Sony a7III (a7RIV if I had the money, lol), 35/1.8, 55/1.8, and 85/1.8. Of course I say this never having shot any of it, but that looks the best on paper, at least, lol. In reality if I had the money and was going to do it I would be renting it all from LensRentals. And if I decided to buy, I probably would buy at least the lenses from them, even though their price is almost full retail because I feel pretty sure I would not get a bad copy. Especially with the 55/1.8 I would not want to play the new-lens lottery.

They seem thoroughly competent, which is something these days.

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