F5: Pmw f5 & la-fzb1

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Hi,

I have a special question, maybe someone can help me.
I want to use a Fujinon ZA17X7,6BERMM58 with a Sony LA-FZB1 (B4 to FZ) Adapter on a Sony PMW F5. It sounds simple but now i heard something about Alac and aborations and that not every HD lens is working with this adapter on the F5.
Can someone tell me if there is a list which ENG lenses are working with the LA-FZB1 adapter on the F5/F55 .

regards
Paul
 
Not sure about that EXACT lens, but I've had good luck with my Fujinon HA 13x4.5 through that adapter on the F5.
it DOES seem to get a little squishy around the edges when run wide open, but only in a few situations. I'm getting lens files built (today, actually) and I'll see if that helps things. Overall, knowing what I know right now, I'd have no problem shooting it (in MPEG, anyway) as long as I stayed away from running wide open. Hope this helps a little.
 
Brian, I'm going to try that same exact lens combo.
What benefits exactly does a lens file do? Do they compensate for flaws somehow? I've never had one done...
As far as I know, that lens doesn't support CAC. Does the F5 even do CAC? Or is the lens file in lieu of that.
 
The LA-FZB1 will still work, however if the lense is not ALAC capable you won't get the full advantage of using the Sony adaptor. The F5/55 is capable of using the ALAC data from the adaptor, but obviously this will only work for ALAC capable lenses. The ability to utilise the ALAC is the key advantage of the using the Sony adaptor over say the MTF or the IBE adaptors. As far as I know the ZA series lenses have ALAC, I know mine both do. I have the 22x and the 12x. How much difference the ALAC makes is another discussion altogether and would require some testing to know for certain.
 
Lens files basically compensate for color shift between lenses. Below is a cut/paste from the Sony F5/55 board that goes through the process. I have such a wide variance in lenses - from 2 B4 2/3" HA lenses to 4 Nikon zooms. I had mine done by an engineer at Abel here in LA - 3 hours labor.

begin paste:
I wanted to take a moment to share our recent procedure which we performed with our F55 when setting up lens files. We have a combination of Zeiss CP.2 Primes, a Zeiss LWZ2 zoom and several Canon EF lenses. We wanted to ensure that we could switch lenses without any noticeable colour shifts.

First we setup the Flares. Flare refers to how some of the light coming through the lens bounces around causing and overall increase in the brightness level this causes the blacks to get lifted from the zero point and the flare adjustment brings the blacks back to zero. This is done by shooting a properly lit grey scale chart, you then using a WFM set the lens exposure an set the green flare adjustment so that the 2 black chips are at zero then overexpose the lens by one stop. Then adjust the red and blue flares so that they are equal to the green (no chroma bleed).

Then Color Shading needs to be performed. Color shading is needed because of a gradual color shift from top of the video image to the bottom, this is due to a mismatch of the lens system and how the video information is clocked out of the image sensor. First shoot a flat white surface which has a reflective colour temperature of 3200K even across it. White offset and shading are done by Setting the WFM to horizontal trigger adjust the light level so your video output read 80% green HSAW so your waveform is flat from left to right then do this for red and blue then adjust HPARA so the waveform is flat from the middle to the edge start with green then adjust red and blue, then recheck HSAW again. Then set your WFM to a vertical trigger and adjust VSAW and VPARA in the same manner as the HSAW and HPARA. After adjusting VSAW and VPARA go back and double check HSAW and HPARA.

We saved a new lens file for each lens, and also saved individual lens files for each lens for use with a 1.4 and a 2x extender added. Each time we change a lens we quickly pull up the corresponding lens file which is very quick to do. Each lens has a lens file number and there is a reminder-tag on each lens to avoid a confusion.

Because a number of our shoots record in MPEG in REC709 it is our belief that using lens files helps with colour matching and allows our customers the economical benefits of minimal grading time.

I must thank Sony for designing the lens file system into their menu structure, it is a great feature, and I highly recommend people consider using it.
 
I have the LAFZ-B4 adapter and use it with a Fujinon 13x4 BERM-M48 4.5-59mm Lens. I shot some test of my lenses and using the 20 inch AbelCine resolution chart I measured MTF on all of my lenses and looked at CA. Here is a comparison between the Fujinon and my Nikon 18-35mm lens. Because the 4K Sony adapter takes close to 3 stops of light the Fujinon needs a lot of light to look good, shooting inside you will find yourself running your F5 at a very high iso to achieve an f stop of f4 which I consider a minimum for my Fujinon, Canon zooms might do better at 2.8.

The chart uses line pairs per picture height, 1 line pair = 1 white line and 1 black line. The 20 inch Abel chart has a maximum of 500 line pairs to measure resolution which would give you at least 1000 lines per picture height. The slant squares in the corners will show CA when present. I use Quick MTF to measure MTF around a lens and to look at CA but the Abel chart will show just about everything you want to know about a lens at a single look.

Sony has shown a smaller 2K adapter that will work with the F series camera's 2K center scan. It has a 2/3 stop light loss and is much smaller. I have been doing comparisons’ measuring MTF of my lenses between normal scan and 2K center scan. I want to run the test again before I make any comments.


Full res files can be found here; look to the lower RH corner of the Dropbox page to download images.

https://www.dropbox.com/sh/v1rjf7ovjpot6z2/24rHbBaf-a

You can see that as the F stop increases resolution goes up, the lines in the corners of the frame are more easy to distinguish. Chromatic aberration is visible in the slant squares on the right. The lens/adapter combo looks best at 5.6.
 
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scocklin said:
Sony has shown a smaller 2K adapter that will work with the F series camera's 2K center scan. It has a 2/3 stop light loss and is much smaller.
Click to expand...

That sounds like an interesting little adapter...is Sony making it available yet? Does it provide power for the servo zoom?
 
JCummings said:
That sounds like an interesting little adapter...is Sony making it available yet? Does it provide power for the servo zoom?
Click to expand...

Hopefully by NAB we should know, and yes it provides power to the B4 lens, I was told it would work electronically the same as the 4K LA-FZB1 adapter. The one I played with had auto iris and zoom.
 
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