B4 2/3" to E-mount for F3

John Cummings · February 6th, 2013, 04:52 PM

I bought the MTF B4 to F3 and I must say I am not very impressed. It tends to flex and leaks light regardless of how well I support the lens. I resorted to putting on a little gaff tape to seal the leaks.

Works as advertised, but barely. As always, you get what you pay for.

Dennis Hingsberg · February 7th, 2013, 09:02 PM

maybe your adapter is defective, have you contacted MTF or your supplier? I know my first MTF adapter for the F3 had issues and I had to exchange it for another one..

Alister Chapman · February 7th, 2013, 10:58 PM

Yes, it designed to work with an F3 to EF adapter, so F3(FZ)-EF-B4.

I'm using one with an F5 up here in arctic Norway shooting the Aurora, or at least I should be, it's been rather cloudy so far.

Dennis Hingsberg · February 19th, 2013, 12:42 AM

John sorry to hear you are not impressed with your adapter. I'm looking to buy one used, so if you have any interest in selling yours please let me know.. thanks,

Dennis Hingsberg · February 19th, 2013, 09:50 AM

When using one of these adapters, which aspect ratio of the is preferred. ie. 4:3 or 16:9 lens?

Alister Chapman · February 19th, 2013, 04:13 PM

The aspect ratio really makes no difference.

Re Light leaks. I assume you are using the supplied support arm for the adapter? This is there to minimise the flex in the mount. Making a a bolt on cover to go across the FZ to EF part of the mount was considered. This would prevent any light leaks and firm up the mount, but make it hard to quickly switch between different cameras and mounts. Light leaks is not a common issue, the EF mount has 3 adjustable tabs that can be expanded with a small screwdriver to give a tighter fit.

Dennis Hingsberg · February 19th, 2013, 04:24 PM

Thanks, what is the difference then between 4:3 and 16:9 mode on a B4 lens and would I care to have one over the other for use on the F3 or F5/F55 ?

Dennis Hingsberg · February 20th, 2013, 09:02 AM

Anyone know?

Martin Drew · March 12th, 2013, 07:37 AM

Quote:

Originally Posted by Dennis Hingsberg

Thanks, what is the difference then between 4:3 and 16:9 mode on a B4 lens and would I care to have one over the other for use on the F3 or F5/F55 ?

I assume you are talking about a lens with a ratio converter built in. The 4:3 option introduces a 0.82x reducer into the image path so that the image circle becomes smaller to make best use of a 4:3 crop from a 16:9 sensor. As soon as you engage the 2x extender though, the ratio conversion is removed anyway. So you can leave it on 4:3 or 16:9 it won't make any difference with the MTF adapter as you will need to have the extender engaged for that.

Dennis Hingsberg · March 12th, 2013, 07:47 AM

Thanks for confirming that. Appreciate it.

February 6th, 2013, 04:52 PM	#16
John Cummings Regular Crew Join Date: Oct 2010 Location: Pepper Pike OH Posts: 49	Re: B4 2/3" to E-mount for F3 I bought the MTF B4 to F3 and I must say I am not very impressed. It tends to flex and leaks light regardless of how well I support the lens. I resorted to putting on a little gaff tape to seal the leaks. Works as advertised, but barely. As always, you get what you pay for. __________________ www.cameralogictv.com

February 7th, 2013, 09:02 PM	#17
Dennis Hingsberg Trustee Join Date: Oct 2003 Location: Toronto, Canada Posts: 1,055	Re: B4 2/3" to E-mount for F3 maybe your adapter is defective, have you contacted MTF or your supplier? I know my first MTF adapter for the F3 had issues and I had to exchange it for another one..

February 7th, 2013, 10:58 PM	#18
Alister Chapman Inner Circle Join Date: Dec 2005 Location: Bracknell, Berkshire, UK Posts: 4,957	Re: B4 2/3" to E-mount for F3 Yes, it designed to work with an F3 to EF adapter, so F3(FZ)-EF-B4. I'm using one with an F5 up here in arctic Norway shooting the Aurora, or at least I should be, it's been rather cloudy so far. __________________ Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com

February 19th, 2013, 12:42 AM	#19
Dennis Hingsberg Trustee Join Date: Oct 2003 Location: Toronto, Canada Posts: 1,055	Re: B4 2/3" to E-mount for F3 John sorry to hear you are not impressed with your adapter. I'm looking to buy one used, so if you have any interest in selling yours please let me know.. thanks,

February 19th, 2013, 09:50 AM	#20
Dennis Hingsberg Trustee Join Date: Oct 2003 Location: Toronto, Canada Posts: 1,055	Re: B4 2/3" to E-mount for F3 When using one of these adapters, which aspect ratio of the is preferred. ie. 4:3 or 16:9 lens?

February 19th, 2013, 04:13 PM	#21
Alister Chapman Inner Circle Join Date: Dec 2005 Location: Bracknell, Berkshire, UK Posts: 4,957	Re: B4 2/3" to E-mount for F3 The aspect ratio really makes no difference. Re Light leaks. I assume you are using the supplied support arm for the adapter? This is there to minimise the flex in the mount. Making a a bolt on cover to go across the FZ to EF part of the mount was considered. This would prevent any light leaks and firm up the mount, but make it hard to quickly switch between different cameras and mounts. Light leaks is not a common issue, the EF mount has 3 adjustable tabs that can be expanded with a small screwdriver to give a tighter fit. __________________ Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com

February 19th, 2013, 04:24 PM	#22
Dennis Hingsberg Trustee Join Date: Oct 2003 Location: Toronto, Canada Posts: 1,055	Re: B4 2/3" to E-mount for F3 Thanks, what is the difference then between 4:3 and 16:9 mode on a B4 lens and would I care to have one over the other for use on the F3 or F5/F55 ? Last edited by Dennis Hingsberg; February 20th, 2013 at 09:02 AM.

February 20th, 2013, 09:02 AM	#23
Dennis Hingsberg Trustee Join Date: Oct 2003 Location: Toronto, Canada Posts: 1,055	Re: B4 2/3" to E-mount for F3 Anyone know?

March 12th, 2013, 07:47 AM	#25
Dennis Hingsberg Trustee Join Date: Oct 2003 Location: Toronto, Canada Posts: 1,055	Re: B4 2/3" to E-mount for F3 Thanks for confirming that. Appreciate it.