Cosina announces Nokton 17.5mm F0.95 lens for Micro Four Thirds

This is effectively a 35mm F/1.8 lens in 35mm equiv. including light transmission and DOF. I kinda think its impressive.

@digifan

Make it look like a Leica lens and you guys just swoon. I'm just saying, you put a magnifying glass on the back of 35mm 1.4 and you'd have a brighter aperture than this. How's that for "technical"

It's not an impressive lens. Lets say you have a viewfinder, lets pretend this is a 4/3 lens and not a micro 4/3. So you have a mirror and a viewfinder. If the viewfinder displayed an image the same size as a Canon 5d viewfinder, this lens on a 4/3 would produce a substantially dimmer image in the viewfinder than a 35mm f/1.4 on a 5d.

Do you understand how that matters? You get how that works? how it doesn't actually gather that much light in comparison to a full 35mm lens? I know you guys can't see past the numbers you are presented, but seriously, use your brain.

@REapper DOF depends on one thing only -- the diameter of the aperture. This is therefore in all respects the same as a 17.5 mm f/0.95 lens on a full frame camera, only the image circle is smaller and you need to crop the image. Cropping, however, doesn't reduce DOF or the amount of light falling on the same area of the sensor. It just changes the apparent focal length.

But distance from the subject does change the DOF and since you crop the image you stand further away so increase this distance and therefore increase DOF

But fullframe body cost more than $1500 :)

2 Mssimo:
Dont be rude and note that fullframe sensor has better signal/noise ratio than 2x cropped

D800 is USD3000, but it's new camera. FF could cost not above 2000-2500 USD (used or new).
Anyway, 35/2 is good lens in any system. And rather cheap. As for IQ - FF killed crop 2 forever. Noise, resolution and so on.

Many people use m43 when they don't want to walk around with a huge, heavy FF body or for an opportunity to use the GH2 which is one of the best HDSLR video camera available. The Voigtlander 25 0.95 may be pricey, but it is one of the best performing m43 lenses.
For video, if you're using AF, your not doing it right, so the fact the the CV are MF is not a minus. DOF aside, it's still a bright lens with a nice 10-blade aperture made for bokeh. But it's not a mass produced lens. As such it is expensive, but judging by the high prices they sell for on Ebay auctions, plenty of people are interested in buying them, me included.

Sorry for being rude.

Also note, if you go to full frame, you find yourself stoping down your lens so they sharpen up. No need to do that with u4/3 (they tend to be very sharp wide open, and tack sharp with one or two clicks)

Please stop the trolling.

Well 17/0.95 make 35 F2 is Full Frame performance, except you need 2 stop less ISO for an image with the same exposure.

So assuming you need to use ISO 6400 on your D800, an E-M1 user need only ISO1600.

I would imagine a E-M1 ISO1600 would definitely beat the D800, despite having a lower resolution.

M4/3 achieve it cheaper overall, in a lighter package.

@ijack. Actually no. FF is four times the size as m4/3 so that's the 2 stops there. Also consider D800 uses SONY's best sensor yet while E-M1 use Panasonic's 2nd worst sensor. As people have keep reminding me, they are in different class and in this case, D800 is about 2~3 classes above E-M1 in terms of IQ.

Whatever the size, if the D800 ISO6400, beat E-M5 ISO1600, I am convinced.

And this is benchmark people should use for equivalence, same size, equivalent F stop, corresponding ISO under the same light situation.

Guys, you are speculating on the small size of MFT body forgetting that this 0.95 lens in quite huge and heavy.