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| p.2 #17 · f/1.2 or faster lenses wide open |
OK, here is a rule on lenses slower than f/1.2: you can post images from lenses as slow as f/1.5 but they must be for comparison purposes – for every shot you post slower than f/1.2 you must also post a shot at f/1.2 (or faster). this should keep us from a deluge of f/1.4 images.
Here or some comparison shots of f/1.4 and 1.5 lenses. The f/1.2 lens is in the photo.
In hindsight I should have also shot this scene with the CV35 f/1.2 II...
If you've visited the Voigtlander and/or GXR thread this might look familiar, sorry for the xpost in advance.
GXR and in order shown above: 50 Lux ASPH, CV50 f/1.5, ZM50 Planar, CV40 f/1.4
WB based on the ZM image, brightness adjusted to match the white in the C of Canon. Of the various LR parameters, contrast was set to zero, black point at 5, clarity at zero.
Note the onion rings in some of the specular highlights with the CV50 f/1.5, though after I shot this, I was going through some images from the 50 Lux and sure enough, found some with onion rings as well, though it seems to be more difficult to provoke from the Lux.
Oops, there's an f/2 lens in here as well...
This is about the lenses, not the camera, but it helps to know what format the lens was on for comparison purposes.
the idea isn't about comparing formats, everybody has already been beaten to death by those differences. no matter which of the common formats you shoot, f/1.2 is the pretty much the speed limit. the idea is to compare lenses and it's important to know the format in order to get a sense for the lens and how well they might work for your preferred format. e.g. the rokkor 58/1.2 is reasonably sharp wide open on FF but pretty soft wide open on 4/3 due to the pixel density. this info helps explain some conflicting opinions about lenses as well as giving an idea to FF frame shooters how their favorite lenses will perform on future higher density sensors (e.g. the NEX-5N has the same pixel density as the D800).
Thanks for mentioning that. I think it's quite relevant about the given sensor. For example, I love the 50 Lux ASPH on the M9, but am not so crazy about it on the GXR. All the edge vignetting is cropped away and what you see is a lower contrast image with perhaps a touch of SA that IMO is kind of bland. I'd rather shoot the ZM50P on the GXR. It seems to match the sensor better with a bit more bite.
I'll see if I can dig up some f/1.2 shots...