Effective focal length of Sony A lens on EX3 at DVinfo.net

Philip Howells · January 12th, 2011, 09:50 AM

I've found various references but no clear explanation so forgive me if this is a topic previous visited.

Are 2/3 lens mounted on the EX3 fully functional?

Doug Jensen · January 12th, 2011, 03:35 PM

Most 2/3" broadcast lenses will be functional with the right adapter, however, due to the smaller 1/2" sensor your field of view will be about 35% narrower. In other words, an 8mm lens on the EX3 would feel like an 11mm lens would feel on a 2/3" camera. Most people (including me) wouldn't like using that as their normal lens. So, you really need to have a very wide 2/3" lens, unless you only care about the telephoto end of the spectrum.

Here's the adapter you'll need.
http://www.bhphotovideo.com/c/product/576005-REG/Fujinon_ACM_21_ACM_21_2_3_Lens_Adapter.html
If you haven't bought a 2/3" lens yet, you'd be a lot better off buying a 1/2" lens for the EX3. I used my Fujinon HSs18x5.5 lens on my EX3 100% of the time and loved it. Changed the "feel" of the whole camera.

Alister Chapman · January 15th, 2011, 03:49 AM

The MTF EX3 to 2/3 B4 adapter is a lot cheaper than the Fujinon adapter. Powered B4 to EX3 Adaptor : Lens Adaptor.Com

Max Bettelle · June 3rd, 2011, 03:02 PM

Using this adaptor with the 2/3" lens, finally the DOF on a EX3 will be like a 2/3" sensor or 1/2" camera sensor?

Alister Chapman · June 4th, 2011, 08:17 AM

DoF is governed by the sensor size, so DoF will be 1/2".

January 12th, 2011, 09:50 AM	#1
Philip Howells Trustee Join Date: Jan 2009 Location: Manchester UK Posts: 1,212	Effective focal length of Sony A lens on EX3 I've found various references but no clear explanation so forgive me if this is a topic previous visited. Are 2/3 lens mounted on the EX3 fully functional? Last edited by Philip Howells; January 12th, 2011 at 10:04 AM. Reason: Other answers found on Mike Tapa's website

January 12th, 2011, 03:35 PM	#2
Doug Jensen Vortex Media Join Date: Jan 2009 Location: Florida Posts: 3,442	Most 2/3" broadcast lenses will be functional with the right adapter, however, due to the smaller 1/2" sensor your field of view will be about 35% narrower. In other words, an 8mm lens on the EX3 would feel like an 11mm lens would feel on a 2/3" camera. Most people (including me) wouldn't like using that as their normal lens. So, you really need to have a very wide 2/3" lens, unless you only care about the telephoto end of the spectrum. Here's the adapter you'll need. http://www.bhphotovideo.com/c/product/576005-REG/Fujinon_ACM_21_ACM_21_2_3_Lens_Adapter.html If you haven't bought a 2/3" lens yet, you'd be a lot better off buying a 1/2" lens for the EX3. I used my Fujinon HSs18x5.5 lens on my EX3 100% of the time and loved it. Changed the "feel" of the whole camera. __________________ Vortex Media http://www.vortexmedia.com/ Sony FS7, F55, and XDCAM training videos, field guides, and other production tools

January 15th, 2011, 03:49 AM	#3
Alister Chapman Inner Circle Join Date: Dec 2005 Location: Bracknell, Berkshire, UK Posts: 4,957	The MTF EX3 to 2/3 B4 adapter is a lot cheaper than the Fujinon adapter. Powered B4 to EX3 Adaptor : Lens Adaptor.Com __________________ Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com

June 3rd, 2011, 03:02 PM	#4
Max Bettelle New Boot Join Date: Apr 2007 Location: Venice ITALY Posts: 22	DOF on EX3 Using this adaptor with the 2/3" lens, finally the DOF on a EX3 will be like a 2/3" sensor or 1/2" camera sensor?

June 4th, 2011, 08:17 AM	#5
Alister Chapman Inner Circle Join Date: Dec 2005 Location: Bracknell, Berkshire, UK Posts: 4,957	Re: Effective focal length of Sony A lens on EX3 DoF is governed by the sensor size, so DoF will be 1/2". __________________ Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com