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Author Topic: Samyang 35 1.4 adds grain?  (Read 5067 times)

FunkyJam

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Samyang 35 1.4 adds grain?
« on: July 14, 2012, 12:43:54 PM »
Hey,

I recently acquired the Samyang 35 1.4 and yesterday while I was testing it I found something strange. So, when I use f22 and I look thru the viewfinder I realized it has alot of grain. Is this normal? I have a Canon 50 1.8 and I never noticed something like that. I used a 7D.


Is it a bad copy?

Thanks alot as always ;)
« Last Edit: July 14, 2012, 12:47:01 PM by FunkyJam »

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Samyang 35 1.4 adds grain?
« on: July 14, 2012, 12:43:54 PM »

Policar

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Re: Samyang 35 1.4 adds grain?
« Reply #1 on: July 14, 2012, 12:59:30 PM »
That's normal.  Put the 50mm f1.8 on, stop down to f22, and press the depth of field preview button--it will look the same.

Most lenses are always wide open through the viewfinder then they stop down briefly before each photo is taken.  The Samyang is fully manual and does not do this; it's like the DOF preview button is on all the time.  The grain is the texture of the ground glass.

FunkyJam

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Re: Samyang 35 1.4 adds grain?
« Reply #2 on: July 14, 2012, 01:37:25 PM »
Thank you alot ;)

ecka

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Re: Samyang 35 1.4 adds grain?
« Reply #3 on: July 14, 2012, 03:27:10 PM »
That's normal.  Put the 50mm f1.8 on, stop down to f22, and press the depth of field preview button--it will look the same.

Most lenses are always wide open through the viewfinder then they stop down briefly before each photo is taken.  The Samyang is fully manual and does not do this; it's like the DOF preview button is on all the time.  The grain is the texture of the ground glass.

+1

I think that the grain comes from 7D's grainy focusing screen, not the lens.
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infared

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Re: Samyang 35 1.4 adds grain?
« Reply #4 on: July 14, 2012, 04:40:51 PM »
I think you are BOTH right....The graininess you are seeing is actually a combination of the defraction of the light from the smaller aperture of the lens...hitting the focusing screen.  The refracted light causes/allows you to see the fresnel of the focusing screen....
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Kathode-Ray

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Re: Samyang 35 1.4 adds grain?
« Reply #5 on: July 14, 2012, 05:26:15 PM »
I noticed this as well. I also see it when I have my 70-200 f/4 fully zoomed-in to 200 on my 60D and there's something bright like blue sky in the frame; even at f/4.0 you can see the texture of the focusing screen. The standard Ef-A screen is quite bright, but also a bit grainy indeed.

I now switched from the Ef-A to the Ef-S screen, and it's much better. This screen gives you a bit darker viewfinder, but in return you get much better contrast and it shows the actual bokeh better. It's more easy to manually focus with this screen, which would be an advantage with the Samyang lens. If you use it with a wide aperture lens like 1.4, the viewfinder still has plenty of light.

Ray
« Last Edit: July 14, 2012, 05:28:18 PM by Kathode-Ray »
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KurtStevens

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Re: Samyang 35 1.4 adds grain?
« Reply #6 on: July 14, 2012, 06:48:01 PM »
What do you think of the lens itself?  Easy to focus?  I've been wondering if I should pick it up for my 5d3.  Thoughts?
5D3 + 16-35 + 85 + 135

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Re: Samyang 35 1.4 adds grain?
« Reply #6 on: July 14, 2012, 06:48:01 PM »

skitron

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Re: Samyang 35 1.4 adds grain?
« Reply #7 on: July 14, 2012, 07:04:29 PM »
What do you think of the lens itself?  Easy to focus?  I've been wondering if I should pick it up for my 5d3.  Thoughts?

I really like mine. I added a programmable autofocus confirm chip and that makes focusing a breeze.
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KurtStevens

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Re: Samyang 35 1.4 adds grain?
« Reply #8 on: July 14, 2012, 07:46:20 PM »
Which chip is that?
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dr croubie

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Re: Samyang 35 1.4 adds grain?
« Reply #9 on: July 14, 2012, 09:02:58 PM »
What do you think of the lens itself?  Easy to focus?  I've been wondering if I should pick it up for my 5d3.  Thoughts?


I really like mine. I added a programmable autofocus confirm chip and that makes focusing a breeze.


Ditto, I AF-chipped my Samyang, plus I got a Katz-Eye screen (split prism With Opti-Brite and 8x10 etchings, best $200 i ever spent (before the 40mm Pancake, that is)).

The AF chips that I recommend are from ml-gvalt on ebay (the same that Ed Mika puts on his FD adapters).
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sanj

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Re: Samyang 35 1.4 adds grain?
« Reply #10 on: July 15, 2012, 12:34:09 AM »
I have the Zeiss 35 1.4. If I half depress the shutter and rotate the lens focus, it beeps when it thinks its in focus.

Would this chip work better? I find it very interesting....

Please educate me on this chip... Pls...

thx

skitron

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Re: Samyang 35 1.4 adds grain?
« Reply #11 on: July 15, 2012, 11:12:37 AM »
I have the Zeiss 35 1.4. If I half depress the shutter and rotate the lens focus, it beeps when it thinks its in focus.

Would this chip work better? I find it very interesting....

Please educate me on this chip... Pls...

thx

The programmable chips work the same way as what your Zeiss is doing when focusing.

But the programmable chips also allow you to set AFMA over a much wider range than the camera body does. For me that was a necessary feature since my Rokinon is actually a Nikon mount and I use an adapter. The thickness of the adapter is too much for the in camera AFMA to adjust so I was able to use the programmable chip to to get it "close to zero" and then us the in camera AFMA to fine tune it. It is in perfect focus now when the camera beeps, even when shooting shallow DOF at f1.4 on my 5D2. And I was also able to use the in camera AFMA on my 50D to get this lens dialed in as well. So I can swap the lens between the two bodies and it will report 35mm focal length and nail focus on both bodies with this programmable chip.

All that said, I don't think you need to change anything with your Zeiss. But remember, you do need to adjust the AFMA since the camera's focus system is working the same as with a regular lens with AF when you use a chipped MF lens. The only difference is there is no motor in the lens to adjust the focus is all. (Plus it also can't open aperture to max for focusing)
« Last Edit: July 15, 2012, 11:15:40 AM by skitron »
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infared

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Re: Samyang 35 1.4 adds grain?
« Reply #12 on: July 15, 2012, 12:08:10 PM »
WOAH! can u make a video of installing the chip? LOL! I had no idea that anything like this was even possible? Makes U wonder why Sam Yang is not installing the chip @ the factory....right?
5D Mark III, Canon 15mm f/2.8 Fisheye, Canon 17mm f/4L TS-E, Canon 16-35mm f/4L IS, 21mm f/2.8 Zeiss, Sigma 35mm f/1.4, 24-70mm f/2.8 II, 50mm f/1.4 Sigma, 85mm f/1.2L, 100mm f/2.8L Macro,70-200mm f/2.8L IS II...1.4x converter III, and some other stuff.....

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Re: Samyang 35 1.4 adds grain?
« Reply #12 on: July 15, 2012, 12:08:10 PM »

ecka

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Re: Samyang 35 1.4 adds grain?
« Reply #13 on: July 15, 2012, 12:58:00 PM »
The difference between Zeiss and Samyang 35/1.4 is that Zeiss has electronic aperture control. Samyang doesn't, it's all mechanical (good for Nikon :) ). IMHO, that chip isn't a must-have for that lens. It works for focus confirmation and adding some EXIF data like lens focal length or focus distance (I'm not sure about the last one), but you won't get any aperture information. I tried the focus confirmation with some lenses and it seems pretty useless for me. I think that MF screen is a better tool for that.
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sanj

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Re: Samyang 35 1.4 adds grain?
« Reply #14 on: July 15, 2012, 01:04:41 PM »
I have the Zeiss 35 1.4. If I half depress the shutter and rotate the lens focus, it beeps when it thinks its in focus.

Would this chip work better? I find it very interesting....

Please educate me on this chip... Pls...

thx

The programmable chips work the same way as what your Zeiss is doing when focusing.

But the programmable chips also allow you to set AFMA over a much wider range than the camera body does. For me that was a necessary feature since my Rokinon is actually a Nikon mount and I use an adapter. The thickness of the adapter is too much for the in camera AFMA to adjust so I was able to use the programmable chip to to get it "close to zero" and then us the in camera AFMA to fine tune it. It is in perfect focus now when the camera beeps, even when shooting shallow DOF at f1.4 on my 5D2. And I was also able to use the in camera AFMA on my 50D to get this lens dialed in as well. So I can swap the lens between the two bodies and it will report 35mm focal length and nail focus on both bodies with this programmable chip.

All that said, I don't think you need to change anything with your Zeiss. But remember, you do need to adjust the AFMA since the camera's focus system is working the same as with a regular lens with AF when you use a chipped MF lens. The only difference is there is no motor in the lens to adjust the focus is all. (Plus it also can't open aperture to max for focusing)

Thx so much for this explanation. I do not understand much of it currently. I will cut and paste it somewhere and slowly understand it completely... :)

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Re: Samyang 35 1.4 adds grain?
« Reply #14 on: July 15, 2012, 01:04:41 PM »