Camera Craniums

Photography Equipment => Lenses => Topic started by: picsfor on January 10, 2010, 01:01:35 PM

Title: Nikon fit lens with an F0 capability
Post by: picsfor on January 10, 2010, 01:01:35 PM
Just having a look over on Flickr as i do and discovered a picture that was taken with an aperture of f0 with a Nikon body.
What lens would have that sort of capability?
Title: Re: Nikon fit lens with an F0 capability
Post by: anglefire on January 10, 2010, 01:28:41 PM
f0 must be a mistake - the F Number comes from the size of the hole compared to the focal length - (Its written more correctly as f/n where n is the stop number) So f/2 on a 100mm lens would mean the aperture is 50mm, f/4 would be an aperture of 25mm and so on. F/0 would be a divide by zero error!

I have seen a 50mm f/0.95 lens on a Canon Rangefinder.

And of course the actual hole is not necessarily the actual size indicated by the f stop - its the effective size!
Title: Re: Nikon fit lens with an F0 capability
Post by: Jonathan on January 10, 2010, 02:25:01 PM
AFAIK The fastest Nikon ever made was the 58mm 1.2 Noctilux.  I'm pretty sure I know where one of these is so I'm keeping quiet on how good it is in case he wants to sell it.... :)

According to mir.com there was an extremely rare 1.0 made but even they don't have pictures of it.

Leica made a legendary 1.0 Noctilux but have replaced this with a 0.95.  I would guess it costs more than a nice family car.
Title: Re: Nikon fit lens with an F0 capability
Post by: anglefire on January 10, 2010, 02:54:27 PM
I don't know how good the Canon version is, or what they cost - I saw it in a camera shop in Rouen - funnily enough we're back there at half term - bet it has gone!

A picture of a similar camera/lens is http://www.flickr.com/photos/geter/4232667093/in/pool-542864@N25 as ever on flickr.

There are also shots taken with the lens - mostly seem to be mounted on Leica's!
Title: Re: Nikon fit lens with an F0 capability
Post by: picsfor on January 10, 2010, 02:56:49 PM
Camera:     Nikon D90
Exposure:    0.005 sec (1/200)
Aperture:    f/0.0
Focal Length:    0 mm
ISO Speed:    200
Exposure Bias:    0 EV
Flash:    

the more info off the picture on Flickr.
the link for the picture is http://www.flickr.com/photos/noelmyoung/4261279313/meta/

I appreciate that the info that is given as part of the exif is not precise as we would read it - none the less - f0.0 is fairly defined.
Title: Re: Nikon fit lens with an F0 capability
Post by: anglefire on January 10, 2010, 03:53:09 PM
Yeah, but so is the focal length - 0!

Its clearly just a mistake and the exif has either been partly stripped or editied.
Title: Re: Nikon fit lens with an F0 capability
Post by: picsfor on January 10, 2010, 04:07:17 PM
yep - didn't follow though - i was just taken by the f0 or as a f00l  :tup:
Title: Re: Nikon fit lens with an F0 capability
Post by: Jonathan on January 10, 2010, 04:53:35 PM
At a guess I'd say he used an extension tube which would preserve the camera exif and mask the lens exif.  I'd also guess he was closer to f45 than f0 ;)
Title: Re: Nikon fit lens with an F0 capability
Post by: picsfor on January 10, 2010, 04:59:12 PM
Hadn't considered that. Give his main photographic subject i would think they are almost the starting point!
Title: Re: Nikon fit lens with an F0 capability
Post by: Oldboy on January 10, 2010, 05:00:54 PM
Just having a look over on Flickr as i do and discovered a picture that was taken with an aperture of f0 with a Nikon body.
What lens would have that sort of capability?
I've had that with the D3 but the picture is just black. It's caused by a bad contact between lens and camera and a quick twist puts it right.  ;D
Title: Re: Nikon fit lens with an F0 capability
Post by: picsfor on January 13, 2010, 01:50:16 PM
OK - i now have the official answer.
Apart from me being an idiot - the answer is - a reversing ring was used.  :doh:
So i think Jonathan came closest!

Matter closed then! :tup: