LensRentals: Variance Measurement for Wide Angle Lenses

**interested_observer** · 07-18-2015, 04:42 PM

The article warns against making generalizations on the data so far. But, take a look at the Rokinon lenses. They do seem to be very consistent. And you can get them in a K mount.

LensRentals.com - Variation Measurements for Wide-Angle Lenses

stevebrot · 07-18-2015, 05:50 PM

Originally posted by interested_observer

But, take a look at the Rokinon lenses. They do seem to be very consistent.

I may be reading the results wrong (wouldn't be the first time), but I think they ranked the Rokinon quite low with a consistency score of only 4 (borderline crapshoot). The best was the Zeiss 15/2.8 at 6.5 (considered good) with none scoring over 7 (excellent).

Their methodology puzzles me a little as does the data presentation, but hey I am not the one being paid to analyze this sort of thing.

Steve

**interested_observer** · 07-19-2015, 12:32 AM

Originally posted by stevebrot

I may be reading the results wrong (wouldn't be the first time), but I think they ranked the Rokinon quite low with a consistency score of only 4 (borderline crapshoot). ......

Steve

Morning Steve - My error. I had worked on a past project where we were doing some indirect driving vision system and had a goodness scorning method where low was good for lens variation. I just interpreted the numbers with slowing down my reading.

osv · 07-19-2015, 11:54 AM

Originally posted by stevebrot

I may be reading the results wrong (wouldn't be the first time), but I think they ranked the Rokinon quite low with a consistency score of only 4 (borderline crapshoot).

here i thought that the o.p. was saying that the korean lenses were consistently bad

which was exactly the experience that i had with four different copies of the 35/1.4 lens.

07-18-2015, 04:42 PM	#1
interested_observer Loyal Site Supporter Join Date: Jun 2009 Location: Tumbleweed, Arizona Photos: Gallery \| Albums Posts: 5,707	LensRentals: Variance Measurement for Wide Angle Lenses The article warns against making generalizations on the data so far. But, take a look at the Rokinon lenses. They do seem to be very consistent. And you can get them in a K mount. LensRentals.com - Variation Measurements for Wide-Angle Lenses

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07-18-2015, 05:50 PM	#2
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by interested_observer But, take a look at the Rokinon lenses. They do seem to be very consistent. I may be reading the results wrong (wouldn't be the first time), but I think they ranked the Rokinon quite low with a consistency score of only 4 (borderline crapshoot). The best was the Zeiss 15/2.8 at 6.5 (considered good) with none scoring over 7 (excellent). Their methodology puzzles me a little as does the data presentation, but hey I am not the one being paid to analyze this sort of thing. Steve

07-19-2015, 12:32 AM	#3
interested_observer Loyal Site Supporter Join Date: Jun 2009 Location: Tumbleweed, Arizona Photos: Gallery \| Albums Posts: 5,707 Original Poster	Originally posted by stevebrot I may be reading the results wrong (wouldn't be the first time), but I think they ranked the Rokinon quite low with a consistency score of only 4 (borderline crapshoot). ...... Steve Morning Steve - My error. I had worked on a past project where we were doing some indirect driving vision system and had a goodness scorning method where low was good for lens variation. I just interpreted the numbers with slowing down my reading.

07-19-2015, 11:54 AM	#4
osv Veteran Member Join Date: Mar 2007 Location: So Cal Photos: Gallery Posts: 2,080	Originally posted by stevebrot I may be reading the results wrong (wouldn't be the first time), but I think they ranked the Rokinon quite low with a consistency score of only 4 (borderline crapshoot). here i thought that the o.p. was saying that the korean lenses were consistently bad which was exactly the experience that i had with four different copies of the 35/1.4 lens.