June 18, 2018, 02:10:12 AM

Author Topic: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2  (Read 6204 times)

pmjm

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #15 on: February 21, 2018, 11:57:54 PM »
I don't know about the rest of you, but I do not trust my ability to pull manual focus at f/1.2 with any kind of consistency at all.

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #15 on: February 21, 2018, 11:57:54 PM »

aceflibble

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #16 on: February 24, 2018, 04:30:23 PM »
50mm f/1.2 gives you about 3" of sharp focus from seven feet away. That's about the same as a 70-200 f/2.8 at the long end from twenty feet away. If you were shooting 50mm at f/2 you'd only get about another half inch of sharp focus, so you can think of it this way; if 50mm f/2 doesn't scare you, 50mm f/1.2 shouldn't, either.

But also remember, nobody is forcing you to use every lens at its widest aperture, and in daily work, you'd rarely want to anyway. You don't really buy f/1.2 lenses to only ever use them at f/1.2. You buy them because they typically have the best transmission, keeping the viewfinder bright even in dark places, and their rendering tends to be softer and more flattering for portraiture even when stopped down. For example, the Canon 50mm f/1.2 and 85mm f/1.2 are technical dogs wide-open and you really don't want to use them like that, but put them down to f/2.8 or so and they have absolutely marvelous rendering in a way that no other lenses at f/2.8 have.
(And the Samyang 85mm f/1.2 is much the same, so we should be bale to assume this 50mm f/1.2 will follow suit.)

Kit Lens Jockey

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #17 on: March 08, 2018, 11:57:32 PM »
You don't really buy f/1.2 lenses to only ever use them at f/1.2.

I don't? ::)

You buy them because they typically have the best transmission, keeping the viewfinder bright even in dark places

But modern focusing screens are frequently not set up to be able to take advantage of any lens wider than f2.8, causing the viewfinder to be no brighter with a fast lens.

lexaclarke

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #18 on: March 15, 2018, 10:51:14 AM »
^My Sigma 35mm f/1.4 makes the viewfinder on my 5D mark II noticeably brighter than when I use the Tamron 24-70 f/2.8. Just the regular default focus screen.

hne

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #19 on: March 16, 2018, 04:26:30 AM »
^My Sigma 35mm f/1.4 makes the viewfinder on my 5D mark II noticeably brighter than when I use the Tamron 24-70 f/2.8. Just the regular default focus screen.

There's a difference both in transmission and aperture. The focusing screen on the 5DmkII has a limit at about f/2.5, after which no brightness increase will happen with larger apertures. A lens with better transmission percentage will still be brighter.
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lexaclarke

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #20 on: March 16, 2018, 07:20:36 PM »
It feels much more than a third of a stop, though. According to DXO the Sigma has a transmission of 1.5 and the Tamron is 2.8. If the 5D mark II's screen caps out at 2.5 then the Sigma should only look a third of a stop brighter, but it's much brighter. If the Tamron's transmission was much further from its f-stop then I'd understand it, but it cant be that far away. Even if I have a particularly bad copy, it's not like it can be a whole stop slower than others.

If you said the 5D mark II's screen has a brightness limit of f/2 then that I would believe because my Canon f/1.8 and f/2 lenses (don't know their transmission) produce almost the same bright viewfinder as the Sigma, but still not quite a total match.

scyrene

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #21 on: March 18, 2018, 07:59:10 PM »
I, with my bad back and surgically (semi-)repaired spine can hold up and manually focus a 500mm f/4 lens on a 2' kestrel flying at approximately 40mph

Why did you do that?

Canon's TS-E lenses died years ago and have never been remade.

What do you mean? They just released some new ones.
Current equipment: 5Ds, 5D mark III, 50D, 24-105L, MP-E, 100L macro, 500L IS II; 1.4xIII + 2x III extenders; 600EX-RT.
Former equipment includes: 300D; EOS-M, EF-M 18-55, Samyang 14mm f/2.8, EF 35 f/2 IS, 70-200L f/4 non-IS and f/2.8L IS II, 85L II, Sigma 180 macro, 200L 2.8, 400L 5.6

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #21 on: March 18, 2018, 07:59:10 PM »

lexaclarke

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #22 on: March 18, 2018, 09:29:20 PM »
Canon's TS-E lenses died years ago and have never been remade.

What do you mean? They just released some new ones.
I think that was sarcasm ;)

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Re: Samyang Optics Launches the Premium Photo Lens- XP 50mm F1.2
« Reply #22 on: March 18, 2018, 09:29:20 PM »