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09-25-2018, 06:16 AM   #1
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Fuji f1.0 AF lens ... Interesting

As announced at Photokina ... Quite a beast !
Fujifilm announces world?s first f/1 lens with autofocus - The Verge

09-25-2018, 06:26 AM   #2
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QuoteOriginally posted by jpzk Quote
As announced at Photokina ... Quite a beast !
Fujifilm announces world?s first f/1 lens with autofocus - The Verge
Ha! On the roadmap for 2020? Good to know we're not the only ones with interminable waiting times!
09-25-2018, 07:02 AM   #3
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Nikon will beat them with their 58mm f/0.95 NOCT AF lens.

09-25-2018, 07:17 AM - 1 Like   #4
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33/1.0 on crop = 50/1.4 on full frame.

So in a couple of years they will have the rough equivalent of Pentax's DFA*50 on the K-1. Good for them.

09-25-2018, 07:19 AM   #5
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The difference between f/0.95 and f/1.0 is quite small, about a sixth of a stop AFAIK. Fujifilm is probably limited by the throat diameter of their mount. Nikon had the luxury of starting from scratch. I get the feeling that they chose the throat diameter to make f/0.95 possible, just for bragging rights.

In any case, we are talking about lenses made for different sensors. Not much to see as far as a comparison goes, then.

I feel kinda jealous. I won't be able to afford any of the above. Besides, my beloved K mount cameras will never be able to take such a lens. 50mm f/1.2 was and remains the ne plus ultra on K mount?
09-25-2018, 07:21 AM   #6
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QuoteOriginally posted by victormeldrew Quote
Ha! On the roadmap for 2020? Good to know we're not the only ones with interminable waiting times!
Almost sounds like Ricoh/Pentax announcements !

---------- Post added 09-25-18 at 10:22 AM ----------

QuoteOriginally posted by Digitalis Quote
Nikon will beat them with their 58mm f/0.95 NOCT AF lens.
By a very small margin ... but will it make a difference ?
09-25-2018, 07:33 AM - 1 Like   #7
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58/0.95 on full frame vs 33/1.0 on crop.

If shallow depth of field is the goal the Nikon wins hands down. That just-under-360º focus throw isn't going to make for quick AF though
09-25-2018, 07:41 AM   #8
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Isn't that Nikkor-Noct supposed to be manual focus?

09-25-2018, 08:00 AM   #9
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QuoteOriginally posted by BarneyL Quote
Isn't that Nikkor-Noct supposed to be manual focus?
Indeed it is. Advantage Fujifilm as far as AF goes, then.

"Nikon is proud to announce the development of the Nikkor Z 58mm f/0.95 S Noct, a one-of-a-kind manual focus lens with the largest maximum aperture of any Nikkor ever..."

NIKKOR Z 58mm f/0.95 S Noct Lens
09-25-2018, 08:33 AM   #10
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QuoteOriginally posted by Wasp Quote
The difference between f/0.95 and f/1.0 is quite small, about a sixth of a stop AFAIK.
0.15 stops. Given the tolerances and differences in transmission this is "zero".


QuoteOriginally posted by Wasp Quote
Fujifilm is probably limited by the throat diameter of their mount.
An lens opening of 33mm is not really demanding.


QuoteOriginally posted by Wasp Quote
Nikon had the luxury of starting from scratch. I get the feeling that they chose the throat diameter to make f/0.95 possible, just for bragging rights.
Even for tiny FE mount Mitakon has a 50mm F0,95 FF lens out there quite some time already.


QuoteOriginally posted by Sandy Hancock Quote
If shallow depth of field is the goal the Nikon wins hands down.
Most people don't want small DoF but subject isolation. And the existing AF 104/1,4 is better in this regard, even a Samyang 135/2 wins over the 58/0,95.
09-25-2018, 08:34 AM   #11
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IIRC Leica mounts can accept f/0.95 (Voigtlander makes it, I think) and Canon has for some time now had an AF 50/1.0 lens. (Second link is to Ken Rockwell, but given to confirm its existence, not for his opinion.)
09-25-2018, 09:48 AM   #12
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Although f/0.95 and f/1.0 may be almost indistinguishable in light-gathering capacity*, in the realm of sports and bragging-rights competitions, a win is a win no matter how small the margin.


*This is NOT true for astrophotography where absolute aperture matters and the 58/0.95 gathers almost 2 stops more star light than a 33/1. Of course, it's not likely the 58/0.95 will be a stellar astro-lens wide-open.
09-25-2018, 12:02 PM   #13
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QuoteOriginally posted by photoptimist Quote
This is NOT true for astrophotography where absolute aperture matters and the 58/0.95 gathers almost 2 stops more star light than a 33/1.
Would you be willing to explain this in a few short sentences?
09-25-2018, 12:59 PM - 2 Likes   #14
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QuoteOriginally posted by pathdoc Quote
Would you be willing to explain this in a few short sentences?
The amount of light captured by the lens is proportional to the physical area of lens' aperture which is proportional to the square of the focal length. But then, the amount of light arriving on each pixel of the sensor is decreased by the square of the focal length because each unit of captured light is spread more.

For images of illuminated areas, the increased magnification effect of a longer focal length exactly cancels the increased light gathering effect of a longer focal length. Thus, a uniform wall looks just as bright in an image taken with a 12 mm lens at f/8 as it does with a 1200mm lens at f/8. Think of it this way: the 1200 mm lens gathers 10,000X more light per unit area of wall but sees 1/10,000 as much wall as the 12 mm lens. That's why a standalone light meter can work - giving an accurate exposure that works regardless of the focal length of the lens.

For images of a point light source, all that matters is the light gathering effect. Magnifying a true point of light with a longer lens still produces just a point of light. But the larger focal length lens will have gathered more light. A 1200mm lens at f/8 gathers 10,000X more light from each star than does a 12 mm lens at f/8. This is why larger telescopes can see fainter stars even if the larger telescope has the same relative aperture as a smaller one.
09-25-2018, 03:37 PM - 1 Like   #15
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The important point of this lens is that in the Fuji orientated surveys,it was requested!

Fuji users request things and Fuji provides them.No arrogant ignoring attitudes,just a willingness to keep the customer happy.

Steady growth in both their systems.

Smart avoidance of crowded markets(FF) coupled with high quality optics,they know what they are doing in a shrinking market.
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