Review: Kolari Ultra Thin Sensor Stack Modification

Introduction

Cover glass from the Sony A7, A7II, Kolari version 2 mod, and Kolari Ultra-Thin mod (from Kolari’s website )

Most rangefinder lenses used on a Sony a7 series camera show some serious issues because of the rather thick filter stack in front of the sensor. There are two ways to deal with this. We have previously discussed the use of front filters to counter the induced field curvature. In this article Sebboh reviews another solution.

This is an extended use review of the Kolari Ultra Thin (UT, also sometimes referred to as version 4) sensor stack modification on a Sony A7. This modification removes the AA filter and IR cut filter from a stock Sony camera and replaces it with an ultra thin 0.2mm thick IR cut filter in order to attempt to provide similar levels of performance to the Leica M9 in dealing with the steep ray angles often produced by rangefinder lenses designed for film. I have shot a UT modified Sony A7 for 6 months now and can confirm that it dramatically improves performance with certain lenses (big thanks to Nehemiah for letting me use his lenses and cameras for the comparisons shown here). I will try to outline what kind of improvements can be expected here and what drawbacks there are to getting the conversion done.

Sony A7 Kolari UT | Carl Zeiss Contax G 21mm f/2.8 Biogon | f/11

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Quick Review: Peak Design Anchor Links

Peak Design Anchor Links
Peak Design Anchor Links

There is one big issue with neck- or wrist straps: Because it takes several minutes to change a strap most people have just one which doesn’t work too well for many scenarios. The Peak Design Anchor Links fix this issue. In this quick review you learn why they have become an integral part of the team’s kit.

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The Manual Photographers Series Part 7: Helena Normark

P: Hi Helena, can you tell us a little bit about yourself and how you came to use manual lenses?

H: My name is Helena Normark and I was born in northern Sweden. When finished with school I moved to Stockholm to work. After a few years I met my current partner and when he got a job in Trondheim, Norway 2004 we decided to move here, which we have never regretted. Beautiful country with friendly people.

I work from home as an artist/illustrator, drawing clipart among other things. This means that I am fortunate to be able to go out whenever the light is good and my favorite weather is so called “bad weather”. Nothing livens me up more than being out with the camera in a thunderstorm or snowstorm.  🙂

When turning seven I got my first camera, but photography as a hobby didn’t take off until 2008 when I got the Canon 5D and 35L, and eventually various other AF lenses. I enjoyed the Canon gear, but finding the alternative board at FredMiranda.com in 2012 opened my eyes to the wealth of old MF lenses, so when I stumbled upon a Sony A7 for a really good price I decided to switch systems.

First I got a few Contax Zeiss lenses which were great and I still have most of them, but they aren’t very fast or flare resistant, which is important for my style, so I ended up buying a few Voigtlanders  and like them a lot.

Fall and winter (especially winter) are my favorite seasons.  One of the reasons is that I like a calmness in my photos and find it easier when there is snow. Also, there are fewer people about and usually I prefer to be alone when I am out with the camera.  I am part of a local photo group though and at least once a month we meet up and take a little trip or walk and it is always very nice and also inspiring to see what others come up with from the same subjects/scenery. Highly recommended!

Some winter photos, all from the Voigtlander 50/1.5 VM:

Continue reading The Manual Photographers Series Part 7: Helena Normark

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