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Archive 2010 · ROKKOR Image & Discussion Thread

helimat
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p.5 #1 · p.5 #1 · ROKKOR Image & Discussion Thread

That's what I figured when you mentioned the wide open halos... My first (rubber grip) was similar, sharp wide open but halos on anything bright. The one I have now (metal, radioactive apparently) does not suffer from this at all.
At any rate, it is certainly working pretty well for you it seems.

As for the operation, I just sat the lens upside down, marked where I wanted to trim, unscrewed the retainer and filed it on the bench well away from the lens. But again, it is certainly working for you the way it is.

Sep 17, 2010 at 10:06 PM

denoir
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p.5 #2 · p.5 #2 · ROKKOR Image & Discussion Thread

Helimat, I did not know that the retainer can be removed. How did you unscrew it?

http://peltarion.eu/img/rokkor/rokkor-9.jpg

http://peltarion.eu/img/rokkor/rokkor-10.jpg

http://peltarion.eu/img/rokkor/rokkor-11.jpg

http://peltarion.eu/img/rokkor/rokkor-12.jpg

Sep 18, 2010 at 04:21 AM

charles.K
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p.5 #3 · p.5 #3 · ROKKOR Image & Discussion Thread

Damn another thread to tempt me

Love these photos and rendering of the Rokkor lenses.
Wow....Great shots everyone!!! This thread has just caught my eye.
Luka, love these last set of shots.

Sep 18, 2010 at 04:38 AM

Krosavcheg
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p.5 #4 · p.5 #4 · ROKKOR Image & Discussion Thread

Denoir: Just as I expected. Excellent shots! My compliments!
I also enjoy LoCa absence wide open. It's replaced my 35-70/3.4 for now until I can tame the beast!..

Sep 18, 2010 at 04:55 AM

denoir
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p.5 #5 · p.5 #5 · ROKKOR Image & Discussion Thread

Thanks Charles, Dmitri!

The bokeh the 58/1.2 produces is really something special while at the same time it's definitely no Zeiss in terms of micro contrast. The color rendering is quite nice though. I knew that Minolta had a very good reputation when it came to colors and it is really a justified reputation.

Sep 18, 2010 at 05:27 AM

Krosavcheg
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p.5 #6 · p.5 #6 · ROKKOR Image & Discussion Thread

The Ragn-sells cart is rather detail rich though. For the love of god, how ddid you get that thick DOF even WO

? It would be a miracle if I got the half of the sign sharp at 1.2!!

Sep 18, 2010 at 06:37 AM

denoir
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p.5 #7 · p.5 #7 · ROKKOR Image & Discussion Thread

Well, the distance was perhaps 2 meters so I had a bit of DOF. Tripod + live view for critical focus and I tried not to overdo the angle to the surface. I focused on the middle of the sign.

Here is the same thing but from a bit further away with subsequently larger DOF, but with a greater angle:

http://peltarion.eu/img/rokkor/rokkor-20.jpg

Sep 18, 2010 at 07:39 AM

cuonghuutran
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p.5 #8 · p.5 #8 · ROKKOR Image & Discussion Thread

This lens in the hands of a master just shines!

Sep 18, 2010 at 07:52 AM

Krosavcheg
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p.5 #9 · p.5 #9 · ROKKOR Image & Discussion Thread

Hmm...I just "spoke to DOF master"..

and the dof at around 2 metres is about 0.08m on the FF sensor..it's somewhat shallower on APS-C (0.05)

The shot I posted earlier:
http://www.3byk.org/gallery2/d/5580-2/IMG_5910.JPG

Taken at 1.2 (WO) at around 1.5m (if I remember it correctly) and already the rail is losing a lot of sharpness...

I just can't get my head around the physics of it..

Edit: Can't post links to gallery...driving me f***ing nuts!!!

Sep 18, 2010 at 07:53 AM

denoir
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p.5 #10 · p.5 #10 · ROKKOR Image & Discussion Thread

The numbers given by "DOF master" are very approximate and very often way off. Individual lens model variation is quite large. For instance most for most of my Zeiss ZE lenses DOF table figures do not even come close to reality. I'm not sure yet how the 58/1.2 performs in relation to the DOF table values.

In the first shot of the container, looking at the full image, I'd estimate DOF was about 10-15 cm.

Sep 18, 2010 at 08:17 AM

Krosavcheg
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p.5 #11 · p.5 #11 · ROKKOR Image & Discussion Thread

That is quite possible.
To me personally DOF looks at around 20-30cm, but it's still way off DOF Master estimation anyway.
I guess I need to do few more tests, which is enjoyable with Rokkor anyway..

Here I believe I shot at 1.8 or 2.0 (2.3?)

http://www.3byk.org/gallery2/d/5624-1/IMG_5609.JPG

Sep 18, 2010 at 08:25 AM

denoir
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p.5 #12 · p.5 #12 · ROKKOR Image & Discussion Thread

Hehe, nice shot

Sep 18, 2010 at 08:37 AM

Krosavcheg
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p.5 #13 · p.5 #13 · ROKKOR Image & Discussion Thread

Apparently this guy is always there falling asleep after few drinks....hehe
If you drop by Tokyo, I will take you to see him...

Sep 18, 2010 at 08:59 AM

Bifurcator
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p.5 #14 · p.5 #14 · ROKKOR Image & Discussion Thread

denoir wrote:
In the first shot of the container, looking at the full image, I'd estimate DOF was about 10-15 cm.

By looking at your processed scale I'd say more like 1 or 2 meters. Well, that's what it looks like.

Same with Krosavcheg's sleeper... It seems to start about 60 or 70 cm this side of his knee and end just shy of his navel. That's like 1.5 to 2 meters.

Edited on Sep 18, 2010 at 09:19 AM · View previous versions

Sep 18, 2010 at 09:15 AM

Krosavcheg
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p.5 #15 · p.5 #15 · ROKKOR Image & Discussion Thread

Bif: Looks like I am coming to Aichi next month! We need to shoot..

I might even bring the unconverted Rokkor 58/1.2 for you to try out, if you promise to be nice..

Sep 18, 2010 at 09:18 AM

Bifurcator
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p.5 #16 · p.5 #16 · ROKKOR Image & Discussion Thread

Kewl! Looking forward to playing out and about. Bring your pod, let's do an all-nighter!

Sep 18, 2010 at 09:20 AM

Krosavcheg
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p.5 #17 · p.5 #17 · ROKKOR Image & Discussion Thread

It's all unceratin atm. There will be Dashi Matsuri in Hekinan (the massive cart pushing along the streets while drinking excessive amounts of alcohol).
You could come over with and shoot some fun action?

They won't start until saturday afternoon, and perhaps friday night should be ok for boozing..

Here are the shots from last year's one:
http://www.3byk.org/gallery2/v/Dmitri_Reyer/urban/Japan/hekinan/album/

Sep 18, 2010 at 09:27 AM

helimat
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p.5 #18 · p.5 #18 · ROKKOR Image & Discussion Thread

Krosavcheg wrote:
Hmm...I just "spoke to DOF master"..

and the dof at around 2 metres is about 0.08m on the FF sensor..it's somewhat shallower on APS-C (0.05)

That statement is incorrect I am afraid; The DOF with a lens would be regardless of the sensor format given the distance, focal length and aperture stay the same. So a wide open Rokkor @ 2 meters distance would have the same DOF on a full frame or a crop sensor, and even m4/3's for that matter.

Sep 18, 2010 at 09:41 AM

Krosavcheg
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p.5 #19 · p.5 #19 · ROKKOR Image & Discussion Thread

Helimat: I am beginning to believe that DOF master is rather useless..

here is what it comes up with:
(Canon 50D, 40D, 30D, 20D, 20Da, 10D)
Subject distance 2 m

Depth of field
Near limit 1.97 m
Far limit 2.03 m
Total 0.05 m

In front of subject 0.03 m (49%)
Behind subject 0.03 m (51%)

Hyperfocal distance 148.9 m
Circle of confusion 0.019 mm

V following:

(Canon EOS 5D Mark II)
Subject distance 2 m

Depth of field
Near limit 1.96 m
Far limit 2.04 m
Total 0.08 m

In front of subject 0.04 m (49%)
Behind subject 0.04 m (51%)

Hyperfocal distance 94.4 m
Circle of confusion 0.03 mm

Sep 18, 2010 at 09:50 AM

Bifurcator
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p.5 #20 · p.5 #20 · ROKKOR Image & Discussion Thread

helimat wrote:
That statement is incorrect I am afraid; The DOF with a lens would be regardless of the sensor format given the distance, focal length and aperture stay the same. So a wide open Rokkor @ 2 meters distance would have the same DOF on a full frame or a crop sensor, and even m4/3's for that matter.

Well "IT" would, yes. But the resulting images displayed full screen to fit on a 1920x1200 would look very noticeably different. I think this is really the only measure worth considering. Who cares what the image circle looks like inside the camera. It's the portion that the sensor sees and the resolution that it records it at that is useful to us humans. Right?

Krosavcheg, it's all good! I'm easy! The matsuri sounds like a plan!

Sep 18, 2010 at 09:52 AM

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