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NKIR Thin Filter Mod - A7rII

  
 
realVivek
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p.2 #1 · p.2 #1 · NKIR Thin Filter Mod - A7rII


Yes, I have a 0.7mm thin filter on one of my Sony A7 sensors. This is the sensor from which I can remove the epoxied cover glass very cleanly. All others are very strongly glued on. They are doable but more challenging and not that elegant.

There are advantages, yes.



May 15, 2020 at 04:55 AM
CrazyLeicaFox
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p.2 #2 · p.2 #2 · NKIR Thin Filter Mod - A7rII


realVivek wrote:
Yes, I have a 0.7mm thin filter on one of my Sony A7 sensors. This is the sensor from which I can remove the epoxied cover glass very cleanly. All others are very strongly glued on. They are doable but more challenging and not that elegant.

There are advantages, yes.


Do you have any problems with IR or UV contamination of your images using such a thin sensor filter?



May 15, 2020 at 05:30 AM
realVivek
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p.2 #3 · p.2 #3 · NKIR Thin Filter Mod - A7rII


No and yes.

No because I use it for false color (near UV to 330nm) using specialty lenses and filters and the IR cut is good for this purposes.

With regular lenses (including Leica lenses) there is very little UV transmission.

If I want the best colors, I need to put an UV/IR (dichroic sort) cut filter to cut off some longer wavelength IR contamination.
(My 0.7mm UV/IR filter on the sensor is uncoated.).


CrazyLeicaFox wrote:
Do you have any problems with IR or UV contamination of your images using such a thin sensor filter?





May 15, 2020 at 05:42 AM
 


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samlee.hk
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p.2 #4 · p.2 #4 · NKIR Thin Filter Mod - A7rII


CrazyLeicaFox wrote:
I remember reading that thread. I think that's also where someone (Vivek?) talked about doing their own sensor mod that reduced the stack thickness to just 0.7mm.

Here's a page all about the NKIR version 3 mod:
https://medium.com/攝影二三事/sonya7thinfiltermod-8276254606ba
Edit: for some reason fredmiranda.com doesn't like links, and you'll have to copy/paste this to get it to work.

That page is in Chinese, but my browser extension translator did a decent job, and the most important information is the pictures. I have many of the lenses he mentions there. Among my collection of rangefinder lenses is the Contax G 21 and 28; Zeiss
...Show more

I am the writer of this blog, and i used NKIR mod thin filter since 2016, I have been used 0.75, 0.85mm, with/ without Sensor cover glass of A7R2/R3/M3 mod. For my expenience , around 90% RF lenses will have better result after mod. It seems that no need to do the thinest method for most of RF lenses. ONLY G16, Contarex 21/4.5, Minolta G-Rokkor 28/3.5, the lenses rear elements really close to Sensor needed thinest thin filter.

I needed to do more colour correction under thinest thin filter. 0.2mm thin filter will produce more red colour than 0.7/0.85mm thin filter...For me 0.7-0.85mm without cover glass is good enough for daily use without doing many colour correction...

For ZM 18/4, ZMC 21/4.5, ZMC35/2.8, ZM35/1.4 NO NEED to do the thinest method. The result have no big difference between ZM35/1.4 with/without cover glass mod camera.

As u can see, M240 with micro lenses 11663 @ F2 will have a better edges again A7R2 0.85mm without cover glass mod. But @F4/F5.6 , M240 and A7R2 mod will have close result for egde image.

For me, colour correction is more importance than thin filter thick

For most of time, i can direct use NKIR mod camera for daily use, But in very dark or very cloudy/ low night situation , using UVIR cut filter will have better results.

Now i USE UVIR cut filter as UV filter for daily use...




May 15, 2020 at 08:07 AM
samlee.hk
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p.2 #5 · p.2 #5 · NKIR Thin Filter Mod - A7rII


I bought SONY FE 20/1.8G for daily use , without any UVIR CUT under A7R3 NKIR v3+ (0.85mm thin filter without cover glass Mod). AS FE20G needed 67mm uvir cut filter size, I only got 60/62mm UVIR cut filter on hand. Here are some of samples... For the whole blog, i used NKIR A7R2/R3/M3 mod camera for shooting. Now i USED A7R3 mod + Leica M10D + GR3...

https://medium.com/%E6%94%9D%E5%BD%B1%E4%BA%8C%E4%B8%89%E4%BA%8B/sony-fe-20mm-f1-8g-%E4%BB%A4%E4%BA%BA%E6%84%9B%E4%B8%8D%E6%83%9C%E6%89%8B%E7%9A%84%E5%BB%A3%E8%A7%92%E9%8F%A1%E9%A0%AD-57607df2ac28?source=friends_link&sk=e26f21c570f4953c44d4165a8d8e899fSONY FE 20mm F1.8G



May 15, 2020 at 08:22 AM
nehemiahphoto
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p.2 #6 · p.2 #6 · NKIR Thin Filter Mod - A7rII


Hi guys,

I am interested in getting my a7r2 modded to a v3...does anyone know how to get in contact with the NKIR people beyond facebook? I don't use/like facebook.

Thanks!



Oct 23, 2020 at 03:39 PM
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