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Old January 12th, 2011, 09:50 AM   #1
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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
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Old January 12th, 2011, 03:35 PM   #2
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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.
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Old January 15th, 2011, 03:49 AM   #3
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The MTF EX3 to 2/3 B4 adapter is a lot cheaper than the Fujinon adapter. Powered B4 to EX3 Adaptor : Lens Adaptor.Com
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Old June 3rd, 2011, 03:02 PM   #4
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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?
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Old June 4th, 2011, 08:17 AM   #5
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Re: Effective focal length of Sony A lens on EX3

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