Canon ENG B4 Lens on GH1

That looks simple enough, but not sure how to hook it in with the three wires- pins 1 through 3-

Pin1(+VE) goes to vOut+, pin2(-VE) goes to vOut- and ground to.. virtual gnd?

This would be amazing to get to work with the b3 lens.
 
If you are using that circuit:

Pin 1. Black wire: +VE. - Connect to +Vout
Pin 2. Brown wire: -VE. - Connect to -Vout
Pin 3. Red wire: Gnd. - Connect to Virtual Ground

M
 
Before i had a chance to do this, a friend called me, he saw that i awakened the thread and wanted help. He has a b3 lens, and he picked up a b3 to m4/3 adapter (cieceo (sp..)). When the adapter is screwed onto the lens to where it feels tight, there is still a *lot* of play. My b3 is elewhere (i'm out of town) and i don't have an adapter yet so i don't know if that's normal. Is it?

Is there an adjustment to tighten it? The ring itself is tight, but the connection between it and the rest of the lens has as much as 1/4" of play in all directions. Useable to see that the system works (and it was great to finally see!), but not very useful for shooting..
 
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The B3 lens should be tight in the adapter, there shouldn't be any play at all. I had a B4 to EX3 adapter from Ciecio and it was very well made, so my first thought would be that it might be a problem with the locking collar on his lens.
 
Rob, original hoods for broadcast lenses are unreasonably expensive, look at this
http://www.bhphotovideo.com/c/product/310723-REG/Cavision_LH100P_LH100P_Sunshade.html,
it has 100mm back mount diameter, and with optional ring adapters it's possible to mount it to lenses with different front diameter.
I have one to use with two lenses, works well, however it's made for internal focus lenses.
What lenses do you have? The Canon J13 is not internal focus; in this case better to look for cheap, screw mount, rubber hood to screw directly on the filter thread.
 
Resurrecting this old thread once again, but I have come into possession of an old Canon J13x9B TV Zoom lens. Now I see a lot of info about B4 and B3 lenses, and I see adapters for them listed, but my lens just says Canon J13x9B TV Zoom lens. Is this lens just a simple B mount? Is there such thing? I searched for "Canon ENG B lens adapter" and all I came up with on the old ebay is B4 and B3 adapters. Is this lens actually a B4 or B3 mount? How do I tell? Up until now I have only adapted SLR lenses to my GH2, and I don't know a whole lot about broadcast cameras and their lenses, I just knew I'd seen this thread and when I saw this old camera and its lens for $100 at a thrift shop, I decided I'd buy it. Even if I don't get to have fun with it on my GH2, it looks nice in my office.

Thanks for any help and let me know if I can provide any more useful information!

EDIT
With a little more digging and reading through this long thread, I did come accross this post:

lvlinux said:
qwerty123: that is a B4 mount lens. A B3 mount has the bayonet ring that you turn on the lens, while the other mounts have the ring on the camera.

For 2/3" lenses, "Sony mount", Panasonic, Hitachi, JVC, will always be B4. "Ikegami mount" is the oddball and is usually B3, but occaisionally B4. Note that this ONLY applies to 2/3" lenses - 1/2" lenses are different. With 1/2" lenses, Sony is the oddball and have their own mount type, and the others (Panasonic, HItachi, JVC, Ikegami) use a standard compatible 1/2" mount.

With Fujinon, the number at the end of the lens code identifies the brand it was made for, but I don't know all the numbers. I know that 28 is Sony B4 12 pin however (eg A14x9BERM-28), and that 11 is Ikegami. Also, with Fujinon, if there is an "F" in the model, then it is definitely a B3 mount (eg A14x9FERM-11 is Ikegami 12 pin). With Canon, the lens code will end in B3 if it is a B3 mount (J13x9B IRS is B4, and J13x9B3 is B3). Sometimes it will end in B4, but not always.

The first letter specifies the format.
Canon:
J=2/3" (can be B4, B3, or C mount)
H=1/2"
T=1/3"

Fujinon:A=2/3" Bayonet B4/B3
S=1/2" Bayonet
yV=1/3" C mount
DV=1/2" C mount
C=1" C" mount
TH=1/3" Bayonet

The first number in the code specifies the zoom range factor. The second number specifies the widest focal length in mm. So a 10x10 is 10-100mm zoom range. A 14x9 is 9-126mm. And a lens labeled 20x8 is an 8-160mm lens.


In Fujinon codes, "E" means 2X extender. "BERM" means hand zoom rocker with extender. "BMD" means full servo, no zoom rocker (complete remote servo control, even of focus). "BEMD" means full servo without zoom rocker with extender. "BRM" means hand zoom rocker and no extender.

With Canon, it's 3 letters after the model that tell you that stuff: "I" means 2X extender, "K" means no extender, "RS" means zoom rocker and manual focus, "TS" means full servo and no zoom rocker, "IF" means internal focus. So a "Canon J13x9B3 IRS" means it is a J13x9, B3 mount, 2X extender, hand zoom rocker.

"Canon J14ax8.5B3 ITS IF" means it is an internal focus 2/3" B3 mount 8.5-119mm with a 2X extender and full servo, no zoom rocker.
"Canon J13x9B KTS" is a 2/3" B4 mount 9-117mm with no extender, and full servo, no zoom rocker.
"Canon J13x9B KRS" is a 2/3" B4 mount 9-177mm with no extender, and hand zoom rocker.
"Fujinon A14x9BERM-28" is a 2/3" B4 9-126mm 2X extender with zoom rocker.
"Fujinon A18x8.5FERM" is a 2/3" B3 8.5-153mm with 2X extender and zoom rocker.
"Fujinon A18x8.5FEMD" is the same thing, but with full servo and no zoom rocker.
"Fujinon S14x6.4BERM" is a 1/2" 6.4-90mm with 2X extender and hand zoom rocker.

This info should help some people decode this stuff a little better.
Click to expand...

So I'm guessing, then, that my lens is a B4 mount? It has the zoom rocker, but again, the model number is not J13x9B ITS or KTS or anything, just J13x9B. Anyway, if anyone has some insight so I can know for sure, let me know!
 
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Take a picture of the lens mount and post. It's probably easy to tell. Otherwise call up your local TV station and ask if you could bring it by to show a technician. He can tell you in a second.
 
blazer003 said:
Resurrecting this old thread once again, but I have come into possession of an old Canon J13x9B TV Zoom lens. Now I see a lot of info about B4 and B3 lenses, and I see adapters for them listed, but my lens just says Canon J13x9B TV Zoom lens. Is this lens just a simple B mount? Is there such thing? I searched for "Canon ENG B lens adapter" and all I came up with on the old ebay is B4 and B3 adapters. Is this lens actually a B4 or B3 mount? How do I tell? Up until now I have only adapted SLR lenses to my GH2, and I don't know a whole lot about broadcast cameras and their lenses, I just knew I'd seen this thread and when I saw this old camera and its lens for $100 at a thrift shop, I decided I'd buy it. Even if I don't get to have fun with it on my GH2, it looks nice in my office.

Thanks for any help and let me know if I can provide any more useful information!

EDIT
With a little more digging and reading through this long thread, I did come accross this post:



So I'm guessing, then, that my lens is a B4 mount? It has the zoom rocker, but again, the model number is not J13x9B ITS or KTS or anything, just J13x9B. Anyway, if anyone has some insight so I can know for sure, let me know!
Click to expand...

Welcome to the world of pro video lenses! :happy:

The Canon 13x9s are good ones for m4/3 cams---usually quite sharp and work really well. And $100 is a good buy for the lens.

It still should say IRS or KRS or something on the zoom rocker near the red "13X". They didn't put a B4 or B3 label on all of them. Most likely it is a B4 model. There is not really a "B" mount in particular----"B" just stands for "bayonet." There are a couple oddball types that were for I believe Sharp brand cameras and such, but most all of the lenses you find around are either B3 or B4. Take the lens off the camera---if the rotating part of the mount is on the camera, it's a 95% chance it's a B4, and if the rotating part is on the lens itself, then it's a B3.

What kind of camera did it come on? If you tell me that I can tell you what mount it is, or if you have pictures that will work too.
 
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As I dig deeper I'm sure that it's a B3 mount, but just for confirmation, here are some pics. The first two of the lens, the last of the Ikagami camera. Jeez, though, the adapters for B3 -> Micro 4/3 are pretty expensive for a machined piece of metal. $200. I'm sure it's because of the low volume that they must produce. Anyway, I'm contemplating buying one. It would be fun to try this lens out for sure! I just stuck it up to my GH2 body and played around with it a bit, getting some fun tilt shift type stuff with lots of flare. Always fun to play with new toys.

P1080497_resized.jpgP1080498_resized.jpgP1080496_resized.jpg
 
blazer003 said:
As I dig deeper I'm sure that it's a B3 mount, but just for confirmation, here are some pics. The first two of the lens, the last of the Ikagami camera. Jeez, though, the adapters for B3 -> Micro 4/3 are pretty expensive for a machined piece of metal. $200. I'm sure it's because of the low volume that they must produce. Anyway, I'm contemplating buying one. It would be fun to try this lens out for sure! I just stuck it up to my GH2 body and played around with it a bit, getting some fun tilt shift type stuff with lots of flare. Always fun to play with new toys.
Click to expand...

Yep that's a B3. Looks like the camera is an ITC-730 :-)
If you aren't afraid to hack a bit, you can put a Nikon mount on it for under $30. See my previous posts in this thread for info on that. I've done it to a bunch of lenses, B3 and B4. Then you just mount it on a Nikon-m4/3 adapter, which most of us have already.
Actually the first one that I did was that exact lens. You can see video from it here:
https://vimeo.com/13036729
 
Hi everybody ! I have an old canon eng B4 lens ( IX12 PH12x7,5B KRS ) and I want to do some tests with it on my bmpcc. I would like to know if there is anybody who purchased a DC 12v to 12 Pin Hirose adapter from ebay to give me which are the 2pins to power the lens. I searched everywhere on the web but didn't find a schematic :( Thanks a lot !
 
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yann said:
Hi everybody ! I have an old canon eng B4 lens ( IX12 PH12x7,5B KRS ) and I want to do some tests with it on my bmpcc. I would like to know if there is anybody who purchased a DC 12v to 12 Pin Hirose adapter from ebay to give me which are the 2pins to power the lens. I searched everywhere on the web but didn't find a schematic :( Thanks a lot !
Click to expand...

Actually, if you browse through this thread you will find at least one pinout for the 12 pin connector :-) Also you can look through the other thread "Fujinon TV Lens on GH-1...Don't Drool" as I think there is some info in there too.

The PH lens you have is not a B4 lens, it is a 1/2" bayonet. B4 lenses are all 2/3 inch lenses. Canon 2/3" lenses start with "J" like J14ax8.5 and KJ17ex7.7. 1/2" Canon lenses have "H" at the beginning, like PH12x7.5 and YH17x7. The pinouts are the same on the B4 and 1/2" connectors though.
Being a 1/2" lens without an extender, that lens may or may not cover the whole sensor on your BMPCC. If it does, it will be barely covered, so you may want to get a 2/3" B4 (or B3) lens to play with---might give you a less frustrating experience. But you never know, the PH12x7.5 might cover it and work well so it won't hurt to give it a shot!
 
Thanks for this infos :)
Yes I found that on this thread :
1: RET button2: REC button
3: Ground
6: +12V

But I don't know which pin is the number one... I'll try to figure it out.

Edit : I found it, many thanks ! As I can't use it on my bmpcc like you said I'll use the zoom motor inside as a follow focus, replace the rec button by a land controller, and use the zoom hand support on my shoulder rig :)
 
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