- Posts: 197
- Joined: Wed Aug 22, 2012 10:19 pm
Hi,
New Bloom Review on Blackmagic Micro Four Thirds Cinema Camera
http://philipbloom.net/2013/03/29/bmdmft/
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Philip Bloom repeats the statement that a EF lens on 2.3 crop makes a less fine image than a 1.6 crop lens on 2.3 because only part of the lens is used and therefore flaws + softness is exaggerated.
"I love Canon glass and have a lot of it, but they are designed for way bigger sensors than the small BMD sensor. This resulted in a large 2.3x crop of the image, but worse than that, the only light hitting the BMD sensor was from the centre part of the glass, not the whole thing, meaning the image was compromised straight off because of that."
"it is badly worded by me. i need to tweak that. you are magnifying 2.3x into a lens designed for a sensor which doesn’t do this so you are going to amplify any softness in the lens. The centre of the lens is good…better than the edges but using glass not designed for such a small sensor is never a good idea. Glass optimised like the Lumix and Voigtlanders give better overall performance."
I do not think that is true. All footage I have seen from BMCC EF is the closest to the sharpest stuff that I have ever seen with any camera.
Everything that I read so far indicated basically the contrary: that the center of the lens is the most flawless part of any lens. Therefor on the BMCC EF with 1.6 crop or full frame lenses we do not have any smears or CA on the edges.
And that Voigtlander 0.95 is not sharp before it hits 2.8 (http://www.stevehuffphoto.com/2011/02/2 ... id-babsky/)
But probably it is right. Enlight me.
Cheers
New Bloom Review on Blackmagic Micro Four Thirds Cinema Camera
http://philipbloom.net/2013/03/29/bmdmft/
--
Philip Bloom repeats the statement that a EF lens on 2.3 crop makes a less fine image than a 1.6 crop lens on 2.3 because only part of the lens is used and therefore flaws + softness is exaggerated.
"I love Canon glass and have a lot of it, but they are designed for way bigger sensors than the small BMD sensor. This resulted in a large 2.3x crop of the image, but worse than that, the only light hitting the BMD sensor was from the centre part of the glass, not the whole thing, meaning the image was compromised straight off because of that."
"it is badly worded by me. i need to tweak that. you are magnifying 2.3x into a lens designed for a sensor which doesn’t do this so you are going to amplify any softness in the lens. The centre of the lens is good…better than the edges but using glass not designed for such a small sensor is never a good idea. Glass optimised like the Lumix and Voigtlanders give better overall performance."
I do not think that is true. All footage I have seen from BMCC EF is the closest to the sharpest stuff that I have ever seen with any camera.
Everything that I read so far indicated basically the contrary: that the center of the lens is the most flawless part of any lens. Therefor on the BMCC EF with 1.6 crop or full frame lenses we do not have any smears or CA on the edges.
And that Voigtlander 0.95 is not sharp before it hits 2.8 (http://www.stevehuffphoto.com/2011/02/2 ... id-babsky/)
But probably it is right. Enlight me.
Cheers