[now correctly shimmed] D850 with F6J focussing screen!

[Frank Fremerey]

One of the few downsides of the D850 is the focussing screen.

Yesterday the third party focussing screens for the D850 were finally released.

These are the ones available: https://www.focusingscreen.com/index.php?cPath=22_166&language=en&osCsid=a40eeed90e4ecc772b08dac1c8e60f4e

And here is an optical comparsion with focussing "screen shots": http://www.focusingscreen.com/privacy.php

I see that Ec-A, Ec-R and F6-J seem to be the screens with maximum pop for difficult to focus lenses like the 1.2/55, 1.2/50 and 1.2/58 or the 1.4/35 Ai-S.

Because the Ec-R does not seem to be available for the D850, I want to order the F6-J or the Ec-A. Difficult. It seems to me the Ec-A is a tad better.

I will order the Ec-A and keep you posted.

Frank

[Øivind Tøien]

A word of caution: For my D7100 I initially got the all matte S-screen which is also a Canon derived screen and found it very dark. I ended up with ordering the last available all matte Katzeye (without Optibright) which is an FM3A based screen, and it is considerably brighter and easier to use even if the S-screen was even more matte. Thus if you plan to also use it with a f/4 lens my advice is to also consider screen brightness, which is not reflected in the sample images.

[Frank Fremerey]

so I better get the F6 screen?

[Øivind Tøien]

so I better get the F6 screen?

Others might chime in, but I suspect a Nikon derived screen might be a safer choice. (The Fresnel lenses of the screen might be better adapted to the register distance of a Nikon). Of course if you already ordered, you could just try it and see. We really do not know how the matte area of the  Ec-A relates to the S-Screen. The presented images do not keep distance to the subject completely constant (S screen looks a little more blurred, but the test subject a little closer when flipping between the images) so comparison is difficult.

[ianwatson]

Recently I modified an F6-B screen to fit my D3. It is a wonderful change from the standard screen and is still quite bright. My recommendation is to stick with Nikon and go for the F6 screen.

If you fancy a B screen then it took me several weeks to muster the courage followed by five minutes with a metal nail file to do the job.

[Frank Fremerey]

the maker discouraged me to use the Ec-A for MF.

so I ordered the F6-J. I already know the F6 screen on my D500 works very well with my 1.4/35Ai-S for MF

[Frank Fremerey]

the package came today!

[Frank Fremerey]

the shims. now I have four of them and I do not know which of them to use. currently the green dot delivers sharpness, the sharpness in the OVF is off. documentation is small

[Frank Fremerey]

With the original shims delivered with the D850 the F6-J seems to work best.

The 1.4/35 Ai-S at f/1.4, focus on the first golden connector

[BEZ]

Dear Frank,
Are you sure you want your address showing on the image of the package?

[Frank Fremerey]

Dear Frank,
Are you sure you want your address showing on the image of the package?

hm. you want to visit me?

my office address is on my homepage too

[richardHaw]

you may get a visit from an african prince 

mine was a little bit off when using very fast lenses but it's OK. I use the prism to zone in faster and then use peripheral vision to check for the dot.

[BEZ]

hm. you want to visit me?

my office address is on my homepage too

Yes of course I do!

[Frank Fremerey]

Yes of course I do!

I love to see you in Bonn. Give me a week for preparations: red carpets, refill wine cellar....

[Erik Lund]

The Golden standard of focus targets