Canon ENG B4 Lens on GH1

Awesome! Thanks bumkicho.

Just a heads up. This is the second time I purchased a b4 lens on ebay with major issues.

Make sure of the following key additional points before purchasing:

1) 2x extender: glass is clear and no fungus when engaged
2) macro: is working
3) back focus: is working
4) focal ring and aperture turns smoothly
4) also the internal focal elements should turn smoothly as well so that when the lens is at it's longest reach, the internal elements should meet together.

I had just purchased a lens on ebay that had a major issue with the internal focal elements and I'm returning it now. When I get my other b4 lenses back I'll post a pic to show what I mean.

Also, make sure you can return the lens if you do purchase on ebay.

This is a bit frustrating that this is the second lens in the row that I purchased with major issues but most folks on ebay show poor pics so you often just have to take the risk.
 
5005621913
Here is a simple zoom with a Fujinon 14X 9.5 lens. and a picture of my adapter and Rig: http://www.flickr.com/photos/27567137@N06/5005621913/
5005621913
 
I am looking for the best way to be able to have the Canon TV lens be supported (rails etc) and still be able to add on other things such has a mounted mini sound mixer. Without over building and spending a great deal of money.
So I am open for discussion on this.



Servo - Ok I see we have a over 100 dollar solution. Any other ways to make the servo work with off the shelf or from spare parts ?



Waiting on my adapter. Have two lens one with 2x and one plain jane.

My new G2 has already paid for itself.

bumkicho - Sorry I was not able to purchase from you. I missed all the posts was to busy working 14 hour days
for weeks now.
But thanks for making them available !!
 
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tadamadeit said:
I am looking for the best way to be able to have the Canon TV lens be supported (rails etc) and still be able to add on other things such has a mounted mini sound mixer. Without over building and spending a great deal of money.
So I am open for discussion on this.
Click to expand...

Have you considered jag35 dslr cage? It looks well built with many ways to add things on.

tadamadeit said:
bumkicho - Sorry I was not able to purchase from you. I missed all the posts was to busy working 14 hour days
for weeks now.
But thanks for making them available !!
Click to expand...

No need for apology! Let us know how your setup performs.
 
tadamadeit said:
Servo - Ok I see we have a over 100 dollar solution. Any other ways to make the servo work with off the shelf or from spare parts ?
Click to expand...

Method 1: Buy the correct hirose connector. Wire it to 12V source. Plug in.
Method 2: Cut the cable on your lens. Wire it directly to 12V source.

The pinout for the connector is all you need. One of these days I'll dig up the ones that I have for 12 and 6 pin standard connectors. Pin 3 is ground and pin 6 is +12V. THIS IS FOR 6 and 12 pin PUSH-ON HIROSE CONNECTORS.

You can also cannibalize any old busted camera that has the lens connector already on it. Would already have the power wires soldered to the connector that way and you wouldn't even have to solder it.

I've been meaning for the last month or two to get some of this info together and make a tutorial and other stuff, but I've been SUPER SWAMPED with shooting weddings, having a family reunion, and re-doing (my brother and I are doing all the work ourselves) our bathroom in our house which has been sortof a nightmare.
 
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bumkicho said:
Ha ha, lvlinux, sure! How's your lens selling business going? ;)
Click to expand...

Going pretty good - only have a few left with extenders (that I'm not going to keep). Still have a J13x9B4 and a couple Fuji's but haven't had time to list them on eBay.
 
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Any chance we might see those B4 adapters being mass produced at some point? I think they'll certainly become more desirable when we get the Gh2/Af100.
 
lvlinux said:
Method 1: Buy the correct hirose connector. Wire it to 12V source. Plug in.
Method 2: Cut the cable on your lens. Wire it directly to 12V source.

The pinout for the connector is all you need. One of these days I'll dig up the ones that I have for 12 and 6 pin standard connectors. Pin 3 is ground and pin 6 is +12V.

You can also cannibalize any old busted camera that has the lens connector already on it. Would already have the power wires soldered to the connector that way and you wouldn't even have to solder it.

I've been meaning for the last month or two to get some of this info together and make a tutorial and other stuff, but I've been SUPER SWAMPED with shooting weddings, having a family reunion, and re-doing (my brother and I are doing all the work ourselves) our bathroom in our house which has been sortof a nightmare.
Click to expand...
Unfortunately while trying to wire the servo on my Fujinon (pin 6 +12V and pin 3 GRND) it started smoking. So I ruined the servo. Advice to anyone else attempting this, you might want to put a fast blow fuse inline just in case.
 
The pins I gave (have edited my post to say this now) are ONLY applicable to a push-on Hirose type connector (either 6 or 12 pin). The 6 pin connectors are usually found on B4 lenses but the 12 pin can be on either. Ikegami used a different type of 6 pin connector on some of there older cameras and it screws on and I don't know the pinout for that. What type was yours Jaybilizer? Sorry I didn't clarify when I wrote that.
 
I happened to pick up a cheap b4 lens off ebay -- could I maybe take off the b4 mount and throw an m42 mount on there? I have a pretty badly scratched m42 zoom, wouldn't mind taking a shot at it.

Working on taking the b4 mount off, I'm have a hell of a time getting the screws out...
 
By the way, if the m42 will work, what should I do to make the flange distance correct -- M42 is 45.5mm where B4 is 48mm. Spacers or something?

Still can't get those screws out, I'm going to buy a dremel and cut new slots into them, I guess, so I can use a flathead.
 
pomoville said:
By the way, if the m42 will work, what should I do to make the flange distance correct -- M42 is 45.5mm where B4 is 48mm. Spacers or something?

Still can't get those screws out, I'm going to buy a dremel and cut new slots into them, I guess, so I can use a flathead.
Click to expand...

Yes some sort of spacers will work - anything you can find - just make sure it's securely on the lens when you get finished.
 
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