New Lens Turbo II generation now available for Pentax lense

LFLee · 05-13-2014, 08:25 PM

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News from here:New Lens Turbo II generation now available for Canon, Nikon, Minolta and Pentax lenses. | sonyalpharumors

convert K-mount to SONY nex mount. $168.... for those who is interested.

link to purchase:
Mitakon Lens Turbo Focal II Reducer Adapter Pentax K PK Sony NEX VG Camera | eBay

repaap · 05-13-2014, 10:41 PM

Hmmmm. Interesting news.

**dadipentak** · 05-14-2014, 05:28 AM - **1 Like**

Like the ad says, "Close to prefect."

konraDarnok · 05-14-2014, 07:04 AM

If they produced one with a focus motor, like the Pentax AF 1.7x, they'd have something really neat.

jcdoss · 05-15-2014, 07:00 AM

Not sure how long this has been available, but has anyone picked one up yet? It's not too expensive, and if there's a chance the blue dot is gone, it'd be worth it to me.

yusuf · 05-15-2014, 10:54 PM

Any comparison with LT 1?

audiobomber · 05-19-2014, 08:36 AM

Originally posted by dadipentak

Like the ad says, "Close to prefect."

How close? I heard turbo or speed boosted lenses are sharp in the middle, soft on the edges, and show increased distortion and PF. I've seen some pretty horrible examples of flare (so-called "blue dot").

I wonder how much of the above is due to performance of the main lens, poor coatings, no lens hood? What do users think about performance?

EDIT I just read this post and a few responses. It seems there are significant penalties for the boost:
http://www.dpreview.com/forums/post/52905604

Last edited by audiobomber; 05-19-2014 at 10:03 AM.

audiobomber · 06-02-2014, 09:48 AM

Originally posted by jcdoss

Not sure how long this has been available, but has anyone picked one up yet? It's not too expensive, and if there's a chance the blue dot is gone, it'd be worth it to me.

I just ordered one this morning. I have buyers' remorse already

:

NEW Pentax PK Focal Reducer Speed Booster Adapter TO Sony NEX 5 6 7 FS700 FS100 | eBay

All metal structure, with excellent opticals (4 elements/2 groups)

What it does:
•reduce the focal length (by 0.72x wider)
•Ex. 50mm lens on NEX with the adpater, eff. focal length is 50mm x 1.5(crop) x 0.72 = 54mm
•effectively increases the maximum aperture of the lens by 1 stop
•(in other words, under the same aperture, you can use faster shutter speed (by 1 stop).

and this new version is made to overcome the a)blue spot b)slight green tint issues in the old version

the edge fall-off is still to be expected though, this is by nature, not a design issue

What it does not:
•there is no electronic integration, no auto focusing

rawr · 06-03-2014, 01:33 AM

Originally posted by jcdoss

but has anyone picked one up yet?

Someone has. There are even sample images using Pentax glass right here in this forum, complete with low-light flare test:
https://www.pentaxforums.com/forums/76-non-pentax-cameras-canon-nikon-etc/263...mpression.html

05-13-2014, 08:25 PM	#1
LFLee Veteran Member Join Date: Aug 2009 Location: Southern California Photos: Gallery \| Albums Posts: 2,292	New Lens Turbo II generation now available for Pentax lense Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here. News from here:New Lens Turbo II generation now available for Canon, Nikon, Minolta and Pentax lenses. \| sonyalpharumors convert K-mount to SONY nex mount. $168.... for those who is interested. link to purchase: Mitakon Lens Turbo Focal II Reducer Adapter Pentax K PK Sony NEX VG Camera \| eBay

06-02-2014, 09:48 AM	#8
audiobomber Veteran Member Join Date: May 2008 Location: Sudbury, Ontario Photos: Albums Posts: 6,806	Originally posted by jcdoss Not sure how long this has been available, but has anyone picked one up yet? It's not too expensive, and if there's a chance the blue dot is gone, it'd be worth it to me. I just ordered one this morning. I have buyers' remorse already: NEW Pentax PK Focal Reducer Speed Booster Adapter TO Sony NEX 5 6 7 FS700 FS100 \| eBay All metal structure, with excellent opticals (4 elements/2 groups) What it does: •reduce the focal length (by 0.72x wider) •Ex. 50mm lens on NEX with the adpater, eff. focal length is 50mm x 1.5(crop) x 0.72 = 54mm •effectively increases the maximum aperture of the lens by 1 stop •(in other words, under the same aperture, you can use faster shutter speed (by 1 stop). and this new version is made to overcome the a)blue spot b)slight green tint issues in the old version the edge fall-off is still to be expected though, this is by nature, not a design issue What it does not: •there is no electronic integration, no auto focusing

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05-13-2014, 10:41 PM	#2
repaap Pentaxian Join Date: Oct 2010 Photos: Gallery \| Albums Posts: 6,242	Hmmmm. Interesting news.

05-14-2014, 05:28 AM - 1 Like	#3
dadipentak Site Supporter Join Date: Jul 2008 Location: Baltimore, Maryland Photos: Gallery Posts: 11,590	Like the ad says, "Close to prefect."

05-14-2014, 07:04 AM	#4
konraDarnok Veteran Member Join Date: Aug 2007 Photos: Albums Posts: 969	If they produced one with a focus motor, like the Pentax AF 1.7x, they'd have something really neat.

05-15-2014, 07:00 AM	#5
jcdoss Pentaxian Join Date: Nov 2012 Location: Ingelheim am Rhein, Germany Photos: Gallery \| Albums Posts: 6,760	Not sure how long this has been available, but has anyone picked one up yet? It's not too expensive, and if there's a chance the blue dot is gone, it'd be worth it to me.

05-15-2014, 10:54 PM	#6
yusuf Pentaxian Join Date: Nov 2008 Location: Palo Alto, CA Photos: Gallery Posts: 2,497	Any comparison with LT 1?

05-19-2014, 08:36 AM	#7
audiobomber Veteran Member Join Date: May 2008 Location: Sudbury, Ontario Photos: Albums Posts: 6,806	Originally posted by dadipentak Like the ad says, "Close to prefect." How close? I heard turbo or speed boosted lenses are sharp in the middle, soft on the edges, and show increased distortion and PF. I've seen some pretty horrible examples of flare (so-called "blue dot"). I wonder how much of the above is due to performance of the main lens, poor coatings, no lens hood? What do users think about performance? EDIT I just read this post and a few responses. It seems there are significant penalties for the boost: http://www.dpreview.com/forums/post/52905604 Last edited by audiobomber; 05-19-2014 at 10:03 AM.

06-03-2014, 01:33 AM	#9
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	Originally posted by jcdoss but has anyone picked one up yet? Someone has. There are even sample images using Pentax glass right here in this forum, complete with low-light flare test: https://www.pentaxforums.com/forums/76-non-pentax-cameras-canon-nikon-etc/263...mpression.html

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