Metabones Speed Booster
/forum/topic/1181879/38

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ISO1600
Registered: Jul 06, 2005
Total Posts: 4425
Country: Korea, South


Lens Turbo + 50mm f1.4 AIS by Chris.jpg, on Flickr


Lens Turbo + 50mm f1.4 AIS by Chris.jpg, on Flickr


Lens Turbo + 50mm f1.4 AIS by Chris.jpg, on Flickr


Lens Turbo + 50mm f1.4 AIS by Chris.jpg, on Flickr


Lens Turbo + 50mm f1.4 AIS by Chris.jpg, on Flickr

It's awesome. These are all wide open with B+W ND .6


also:
https://plus.google.com/photos/115230258892953865960/albums/5880555323143589665



Nathan Padgett
Registered: Oct 22, 2007
Total Posts: 610
Country: United States

Thanks for sharing those ISO1600. The corners look mushy and soft but I really like that look. But how much of that is just being wide open? Those pics have all kinds of character.

This sounds dumb but I'd love to see a brick wall type shot at 5.6.



ISO1600
Registered: Jul 06, 2005
Total Posts: 4425
Country: Korea, South

These are quick shots chasing my 1 year old around out in the sun, wide open with a 50/1.4 AIS, not known to be an excellent 50 haha.
I am more than happy with the results, it gives me the look I was after.



ISO1600
Registered: Jul 06, 2005
Total Posts: 4425
Country: Korea, South

I'll have other Nikkors next week (35 and 85, both F2 AIS) to try with it.
I will be flooding my flickr and Google+ with photos.



CronoDL
Registered: Jul 21, 2011
Total Posts: 127
Country: United States

I recently got an SMC Takumar 50mm 1.4 to play with the Metabones SB. It's very sharping even wide open, though it falls off as it goes to the corners, as expected. I really like the rendering and bokeh also. The only bad thing is that there's quite a bit of vignetting when wide open.

I've been using a Nikon Series E 50mm 1.8 with the SB for a few short months, and that only has very subtle vigetting wide open. Usually I don't need to correct it since it's pretty natural and smooth. In comparison, the SMC Tak has much much more, and it goes deep into the frame, and has pretty dark corners. Granted, it is 1.8 vs 1.4. The OOF rendering is much smoother on the Takumar, whereas the Series E 50mm can get pretty busy.

What's everyone's favorite 50mm with the SB? And what are your thoughts on its OOF rendering and vignetting performance?



Atlasman2
Registered: Aug 29, 2005
Total Posts: 192
Country: Canada

I just received Turbo for Canon FD. Here are some samples using the FD 24mm f2.8 S.S.C:

I can see sharpness deterioration away from the center.



Atlasman2
Registered: Aug 29, 2005
Total Posts: 192
Country: Canada

ISO1600 wrote:
I'll have other Nikkors next week (35 and 85, both F2 AIS) to try with it.
I will be flooding my flickr and Google+ with photos.


Is there a way to adjust for infinity?



KOJI
Registered: Jan 07, 2006
Total Posts: 93
Country: Canada

"adjust for infinity"? For Metabones Speed Booster only:

Just unscrew a tiny side screw, which holds the optical block not to rotate.
Then rotate the optical block from the rear side
A) rotate clockwise when your lens cannot reach infinity
B) rotate unti-clockwise when the lens pasts infinity.

There is not much space there, so rotate slowly and carefully.




ISO1600
Registered: Jul 06, 2005
Total Posts: 4425
Country: Korea, South

On the Lens Turbo, there is no side set screw like the Metabones has.
Instead, it looks like the optical unit has some kind of sealant holding it in place, but should be able to adjust.
Mine goes to infinity and beyond, but it's very close. I may mess with it if i get bored.



Atlasman2
Registered: Aug 29, 2005
Total Posts: 192
Country: Canada

ISO1600 wrote:
On the Lens Turbo, there is no side set screw like the Metabones has.
Instead, it looks like the optical unit has some kind of sealant holding it in place, but should be able to adjust.
Mine goes to infinity and beyond, but it's very close. I may mess with it if i get bored.


Thanks.

So far the only lenses that don't focus to infinity is the 50mm f1.8 and the 35-105mm, both are non breach mount versions. The 24mm f2.8, the 50mm f1.4 and the 85mm f1.8 all are ok.



69kaine
Registered: May 18, 2013
Total Posts: 2
Country: N/A

A seller on Ebay mentioned to me that the Lens Turbo it is adjustable for infinity using a lens wrench via the retaining ring. But there seem to be many different Lens Turbos, not sure if they are all the same or can actually be adjusted like the speed booster.

Also MXcamera commented on a Lens Turbo video on youtube about the purple reflection problem.

"This is because of internal reflection of coat. The rear lens of lens turbo is too close to the senor. It will occur when using small aperture (around f/8), will fix it soon! Thank you so much."

Also mentions via email that a fix will take 3 months.



ISO1600
Registered: Jul 06, 2005
Total Posts: 4425
Country: Korea, South

I think they are all the same version made by mitakon.



Juy543
Registered: May 18, 2013
Total Posts: 7
Country: Japan

My latest shots with Lens Turbo.

There are large distortions and degradation of resolution. However, The ultra wide angle lens attracts me so much.

Lens Turbo + AiAF Nikkor 18mm F2.8D



Juy543
Registered: May 18, 2013
Total Posts: 7
Country: Japan



Lens Turbo + Ai Nikkor 50mm F1.4S



itaintrite
Registered: Jan 09, 2011
Total Posts: 10
Country: United States

I got a Lens Turbo because.. well, no Minolta MD from SpeedBooster yet and who knows when. It's not just a matter of saving money.



ytwong
Registered: Dec 29, 2003
Total Posts: 1536
Country: China

Juy543, do you find the degrade in resolution acceptable? In the picture here
https://picasaweb.google.com/2010Dash2010/LensTurboAiAFNikkor18mmF28D?authuser=0&authkey=Gv1sRgCOa9m8LLuIqL8AE&feat=directlink#5881200140898912674,
the lower left seems burry.

I wounder how the VC 20mm 3.5 (when stop down) works with those speedbooster or lens turbo on NEX.



Juy543
Registered: May 18, 2013
Total Posts: 7
Country: Japan

Hi, ytwong

I think it is not fair to discuss with night image for resolution, because I took this image without fixing on sold tripod, 4 seconds exposure, ISO1600 and strong noise reduction made resolution degradation on all area.

I would like to discuss with day image as shown below.
On left upper, within around 50% image hight is acceptable, 70% image hight is marginal, over 90% can not be acceptable. The over 90% has not only lower resolution, but also large chromatic aberration.

https://picasaweb.google.com/2010Dash2010/LensTurboAiAFNikkor18mmF28D?authuser=0&authkey=Gv1sRgCOa9m8LLuIqL8AE&feat=directlink#5881200166058820690



ytwong
Registered: Dec 29, 2003
Total Posts: 1536
Country: China

Thanks a lot. Looks like it's hopeless for any photos with the borders in focus... Maybe I should save the money for a Zeiss 12mm Touit or the Sony UWA zoom.



uhoh7
Registered: Nov 12, 2010
Total Posts: 2120
Country: N/A

I also Just received my lens turbo, For Nikon.

I have tried at 28 mm, 35 mm 50, 55 and 180.

For any sort of landscape, the adapter does not seem good. So far, I am losing resolution, gaining noise, and having trouble with the edges.

However, this is just after a few days of testing, so I'll keep you posted if anything changes.

I was pretty shocked yesterday When the edges of my 55 micro were soft at F8. The lens that has worked best with it, is a 50/1.4 AIS.













above 55 micro before and after













above 180 AIS ED beofre and after

shot with 5n


cyberstudio
Registered: Nov 08, 2005
Total Posts: 592
Country: Canada

Do you guys think it is a good idea to split out and form a thread dedicated to Lens Turbo? (Instead of mixing it inside the Speed Booster thread.) If a moderator could help with the split, all the better. Thanks!



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