Metabones Speed Booster
/forum/topic/1181879/10

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Beni
Registered: May 31, 2005
Total Posts: 8232
Country: United Kingdom

Very much looking forward to your blog post!



cogitech
Registered: Apr 20, 2005
Total Posts: 11365
Country: Canada

I came up with this idea several years back and everyone around here said it was impossible.

I should learn to trust my intuition. Once again I let go a million-dallar idea.



carstenw
Registered: Dec 26, 2005
Total Posts: 15133
Country: Germany

There could be room for two in the market



mawz
Registered: Sep 11, 2005
Total Posts: 7528
Country: Canada

Brody LeBlanc wrote:
IMO, I would only use this adapter for fast -50mm glass, like a 50/1.2 and a 35/1.4, but to each his own.



Not for wides? Which are the real problem with APS-C Mirrorless systems.



sebboh
Registered: Nov 02, 2009
Total Posts: 10061
Country: United States

mawz wrote:
Brody LeBlanc wrote:
IMO, I would only use this adapter for fast -50mm glass, like a 50/1.2 and a 35/1.4, but to each his own.



Not for wides? Which are the real problem with APS-C Mirrorless systems.


i'm really just curious about my c/y 35/1.4, rokkor 58/1.2, and samyang 85/1.4 at largish apertures.



ISO1600
Registered: Jul 06, 2005
Total Posts: 4404
Country: Korea, South

Unless things change GREATLY in the FF sensor + short flange distance universe, I'd rather have APS-C NEX and Speed Booster than the probable corner issues.



freaklikeme
Registered: Apr 08, 2005
Total Posts: 5559
Country: United States

If this pans out well, we're going to have to change the forum stance of, "Glassed adapters suck," to "Glassed adapters suck unless they're designed by Caldwell."



Taylor Sherman
Registered: Mar 26, 2012
Total Posts: 1052
Country: United States

My Leica-R adapter arrived today. Seems like a nice product. Quality is high like my other Metabones adapters, though there's some sort of rough edge going on between the lens-facing ring and the body of the adapter. Rough to the fingertips, but not rough to the lens or anything.

Anyway, no shots yet as I haven't gotten out to use it yet. But, looks good so far with test shots around the house.



LeadyGonzales
Registered: May 19, 2011
Total Posts: 422
Country: Switzerland

Taylor Sherman wrote:
My Leica-R adapter arrived today. Seems like a nice product. Quality is high like my other Metabones adapters, though there's some sort of rough edge going on between the lens-facing ring and the body of the adapter. Rough to the fingertips, but not rough to the lens or anything.

Anyway, no shots yet as I haven't gotten out to use it yet. But, looks good so far with test shots around the house.


.. would love to see anything even test shots in the house. Is it possible, that you post a picture with and without adapter plus a 100% crop ?

regards, L.



artur5
Registered: Oct 09, 2005
Total Posts: 446
Country: Andorra

ISO1600 wrote:
Unless things change GREATLY in the FF sensor + short flange distance universe, I'd rather have APS-C NEX and Speed Booster than the probable corner issues.

Sorry, I don't get the meaning of your post.
Corner issues on current NEX cameras are only with RF wideangles. You can't use RF wides with the Metabones SB. No comparison possible.
On the other part, If you compare the photos taken with a SLR lens + a hypotetic FF NEX against the images produced by the same SLR lens + SpeedBooster + NEX-7, I'm sure that the former combo would win easily., provided that the sensor of that new FF NEX will be at least as good as the one in the NEX-7, which logically it should be.



RCicala
Registered: Jan 09, 2005
Total Posts: 2905
Country: United States

FWIW the post is up. It's an impressive tool.

http://www.lensrentals.com/blog/2013/01/metabones-magic



Romain
Registered: Mar 11, 2005
Total Posts: 248
Country: France

thanks for the blog post Roger, very interesting and informative, as always.



Beni
Registered: May 31, 2005
Total Posts: 8232
Country: United Kingdom

RCicala wrote:
FWIW the post is up. It's an impressive tool.

http://www.lensrentals.com/blog/2013/01/metabones-magic


For half the people here Roger, the blooming you have noticed is a plus..



alwang
Registered: Sep 02, 2011
Total Posts: 1007
Country: United States

RCicala wrote:
I've spent the morning testing it. Going to take me a while to write the blog post, but the summary is pretty straightforward:

As long as you don't mind giving up a bit of resolution and adding a bit of astigmatism, it does exactly what they say.

Videographers will be thrilled with it. Landscape photographers would not.



Hi Roger,

Great article, thanks very much. However, I'm a bit confused by your statement above that you've giving up a bit of resolution: it seems from your test that although there was some additional astigmatism and distortion, the MTFs were higher with the SpeedBooster compared to the 5DmkII across the board? Or am I missing something?



Taylor Sherman
Registered: Mar 26, 2012
Total Posts: 1052
Country: United States

LeadyGonzales wrote:
Taylor Sherman wrote:
My Leica-R adapter arrived today. Seems like a nice product. Quality is high like my other Metabones adapters, though there's some sort of rough edge going on between the lens-facing ring and the body of the adapter. Rough to the fingertips, but not rough to the lens or anything.

Anyway, no shots yet as I haven't gotten out to use it yet. But, looks good so far with test shots around the house.


.. would love to see anything even test shots in the house. Is it possible, that you post a picture with and without adapter plus a 100% crop ?

regards, L.


OK!

Nex-7 + MER60, regular adapter
http://www.flickr.com/photos/taylorsherman/8406263350/in/photostream/

Nex-7 + MER60, speedbooster
http://www.flickr.com/photos/taylorsherman/8406264930/in/photostream/

Both at f/2.8

There are 100% crops of each nearby too. Not 100% sure I focused correctly on either one.



RCicala
Registered: Jan 09, 2005
Total Posts: 2905
Country: United States

alwang wrote:

Hi Roger,

Great article, thanks very much. However, I'm a bit confused by your statement above that you've giving up a bit of resolution: it seems from your test that although there was some additional astigmatism and distortion, the MTFs were higher with the SpeedBooster compared to the 5DmkII across the board? Or am I missing something?



I wrote that yesterday while I was still crunching the numbers. I think I wasn't mentally ready to accept those results, maybe

At that time I was looking at the astigmatism and the lower numbers (where astigmatism was having it's effect) do show a slight reduction, but the average at each location (sagittal and tangential) are improved.

It's why I said if I was shooting large-print landscapes, where the astigmatism would certainly show, I wouldn't be as happy. But for video or normal photography, I don't think it would be significant.



Jman13
Registered: May 02, 2005
Total Posts: 10329
Country: United States

What I want to see is, say, a 50mm f/1.2 on the 5D III, then the 50mm f/1.2 on the NEX-7, taken from the same spot. They should look (more or less) identical, and I'm curious about the comparison of MTF between those two things, not the difference between a lens with a normal adapter and the speedbooster.



artur5
Registered: Oct 09, 2005
Total Posts: 446
Country: Andorra

Yes, you're absolutely right. We assumed that using the Speedbooster, in theory, should improve the performance of a FF lens on a APS-C sensor versus the same lens in the same sensor, without the SB. The results so far aren't showing that improvement, only a gain in speed.
That test that you suggest of a 5DIII vs NEX-7+speedbooster is the one that would give us a clue about the losses ( hopefully minimal ) caused by the optics of the SB.



hiepphotog
Registered: Aug 19, 2009
Total Posts: 829
Country: United States

Jman13 wrote:
What I want to see is, say, a 50mm f/1.2 on the 5D III, then the 50mm f/1.2 on the NEX-7, taken from the same spot. They should look (more or less) identical, and I'm curious about the comparison of MTF between those two things, not the difference between a lens with a normal adapter and the speedbooster.


I believe Roger did just that with the Imatest, no?



alundeb
Registered: Nov 06, 2005
Total Posts: 4243
Country: Norway

artur5 wrote:
Yes, you're absolutely right. We assumed that using the Speedbooster, in theory, should improve the performance of a FF lens on a APS-C sensor versus the same lens in the same sensor, without the SB. The results so far aren't showing that improvement, only a gain in speed.
.


The 14 mm 2.8 is clearly showing that improvement, in the center.



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