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Sainsonic Kamlam 50mm F/1.1 for APS-C mirrorless
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PostPosted: Thu Jul 06, 2017 9:50 pm    Post subject: Sainsonic Kamlam 50mm F/1.1 for APS-C mirrorless Reply with quote

Have you guys seen this? Only $170, not bad!

https://www.dpreview.com/news/3243420011/sainsonic-launches-50mm-f1-1-lens-for-aps-c-cameras


PostPosted: Thu Jul 06, 2017 10:10 pm    Post subject: Reply with quote

Interesting........ Like 1 small


PostPosted: Thu Jul 06, 2017 10:41 pm    Post subject: Reply with quote

Some shots with my lens here


PostPosted: Thu Jul 06, 2017 11:45 pm    Post subject: Reply with quote

What kind of a design is 5/5? I wonder.


PostPosted: Fri Jul 07, 2017 5:29 am    Post subject: Reply with quote

interesting price and rendering ( thanks to wolfhansen for the other thread )

what is the true T stop of this lens ?? f1.2 f1.4 ?

more over i didn't found a noticeable difference in bokey between this lens at f1.1 and the canon at f1.4

https://img4.hostingpics.net/pics/955526Sanstitre.png


wait and see other users feeback Wink


PostPosted: Fri Jul 07, 2017 6:54 am    Post subject: Reply with quote

Gardener wrote:
What kind of a design is 5/5? I wonder.

Is there a diagram? that's the easiest way to find out its heritage, I've not looked since I'm not remotely interested in an APS-C lens.
My first guess is Double Gauss, since most fast 50's are of this type.


PostPosted: Fri Jul 07, 2017 6:24 pm    Post subject: Reply with quote

Should not Double Gauss have at least 6 elements? I myself thought it could be some Sonnar derivative.


PostPosted: Mon Jul 10, 2017 8:57 pm    Post subject: Reply with quote


Indeed it looks like refined Sonnar design... I consider flat element in the middle to be aperture and not lens.


PostPosted: Tue Jul 11, 2017 5:11 am    Post subject: Reply with quote

Like 1


PostPosted: Tue Jul 11, 2017 12:53 pm    Post subject: Reply with quote

In case someone interested in the MTFs.





PostPosted: Tue Jul 11, 2017 12:59 pm    Post subject: Reply with quote

THX Calvin!! Like 1 small


PostPosted: Tue Jul 11, 2017 4:02 pm    Post subject: Reply with quote

Please don't use New: prefix it, ruin search engines performance, use only lens name in title


PostPosted: Tue Jul 11, 2017 7:55 pm    Post subject: Reply with quote

@calvin83: Is it for 10, 20, 30 lp/mm? Measured or calculated? First one wide open?


PostPosted: Wed Jul 12, 2017 12:31 am    Post subject: Reply with quote

Suppose all the MTF result is calculated. No idea if it is 10, 20, 30 cy/mm. First one is WO.