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Ultra-Fast Lenses (1)

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waldo_posth View Drop Down
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Post Options Post Options   Quote waldo_posth Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2018 at 12:41
Originally posted by QuietOC QuietOC wrote:

...

There are really no ultra fast lenses for APS-C. ...


I am puzzled. Josef's (Coast) Kamlan lens is APS-C. Samyang offers two F/1.2 manual focus APS-C lenses - a 35mm and a 50mm lens. I am sure there are even more.
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rovhazman View Drop Down
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Post Options Post Options   Quote rovhazman Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2018 at 07:37
Originally posted by QuietOC QuietOC wrote:

Originally posted by rovhazman rovhazman wrote:

maybe even f/1.4 lens with turbo adapter...)

While that makes an ~f/1 APS-C lens the combination doesn't even look as fast as the f/1.4 lens looks on full-frame. F/1.8 lenses also become f/1.3 APS-C lens on a focal reducer. This thread should probably stay uncluttered with focal reduced lenses on APS-C unless the original lens was already faster than f/1.4.

There are really no ultra fast lenses for APS-C. There are several f/0.95 options, but those also look slower on APS-C than f/1.4 lenses look on full-frame.


The cut off of f/1.2 is totally arbitrary and, as I said in the beginning of this thread, there is no much different between f/1.2 and f/1.4, especially if you mix FF and APS-C (note that when the thread started a FF E-mount camera was only a wishful thinking...).

The definition of ultra-fast lens in this thread is not by depth of focus or the physical aperture opening - if that was the definition, 300/2.8 has shallower DoF and larger aperture than 35/1.2...

To make it simple, we defined the eligible lenses by the effective F number from the exposure point of view - f/1 on APS-C gives you longer exposure time than f/1.4 on FF (for a given scene and a fixed ISO). Therefore, f/1 is faster than f/1.4, regardless the sensor format. And following this logic, the turbo adapter allows shorter exposure time...
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Post Options Post Options   Quote rovhazman Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2018 at 18:45
OK, I took my 35/1.2 out again...

Hibiscus

Sony ILCE-7RM2 + Voigtlander Nokton Aspherical 35mm F1.2 II | ISO 200 | f/1.2 | 1/1250 sec

And for Coast - one of Ron (the baby from page 1) from today...

"Daddy, not again!!"

Sony ILCE-7RM2 + Voigtlander Nokton Aspherical 35mm F1.2 II | ISO 200 | f/1.2 | 1/3200 sec
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2018 at 21:14
Autumn leaves


A7ii + Nokton 35/1.2 II @ f1.2
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Post Options Post Options   Quote Coast Quote  Post ReplyReply Direct Link To This Post Posted: 13 December 2018 at 04:54
f/1.1 50mm

the Bridge, the Bay, the boat and the Port
by /photos/purple-bullet/Coast
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 03 April 2020 at 08:26
Leffe


A7 + Voigtländer Nokton 35/1.2 II @ f1.2
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Post Options Post Options   Quote waldo_posth Quote  Post ReplyReply Direct Link To This Post Posted: 03 April 2020 at 17:30
Seems you have been going to great lenghts for this - gorgeous - shot, Pieter! Beer from a monastery at the Ivory Coast?

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Post Options Post Options   Quote brian33 Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2020 at 10:11
The 58/1.2...


Shoots the XS (and vice-versa)
I detest bugs, especially spiders.
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Post Options Post Options   Quote brian33 Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2020 at 10:48
I think Louise left the 58/1.2 at 1.2...



To shoot this image


But I think it turned out OK.
I detest bugs, especially spiders.
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Post Options Post Options   Quote brian33 Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2020 at 11:57
Yesterday I took this photo with my iPhone (the 56mm equivalent lens)


Because for once I went out without my camera and I was like, ah man, I gotta come back with my real camera and my 50/1.2. So I came back to that spot this morning.

I thought the 50/1.2 would be a good choice, and I wanted to shoot at 1.2 (and a CPL filter) to give it a nice dreamy look. Here's what I came up with:

Standing on the same bridge, opposite direction




Reproducing the iPhone shot (obviously with way different processing, in addition to shooting at 1.2)



And another shot at 1.2

All on A7 and MD Rokkor 50/1.2

Edited by brian33 - 10 April 2020 at 16:17
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Post Options Post Options   Quote Cucoo Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2020 at 12:32
The lamp post looks nice.

The second bridge shot - man, and I thought the Rokkor 50 1,4 and 58 1,4 showed a lot of glow already
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Post Options Post Options   Quote brian33 Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2020 at 16:17
Ha! Yeah those lenses are hazy and low contrast at max aperture but that's what I like about them!
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Post Options Post Options   Quote Cucoo Quote  Post ReplyReply Direct Link To This Post Posted: 30 April 2020 at 23:15
I think/hope I've got something fast enough to play - F1.25?









Sony a7ii, 7Artisans 75/1.25

Edited by Cucoo - 30 April 2020 at 23:21
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QuietOC View Drop Down
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 30 April 2020 at 23:53
Originally posted by mikey2000 mikey2000 wrote:

So, what's the cheapest way into the Ultra Fast world? (for A-mount - I don't have a FF E mount yet )

The cheapest is probably the Neewer 35mm F1.2 unless you want to adapt a projector or C-mount lens.


A6000 + Neewer 35mm F1.2
ISO 100 1/3200 s f/1.2
Sony A7RIV LA-EA5
Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9
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