Erik Kaffehr

Hi Manzur, The IQ 250 also uses a CMOS sensor, the same one that is used in the GFX 50 models. 'Hot mirror' and CFA may be different, though. Best regards Erik

I will consider changing my signature. You happen to have a suggestion? :-) Erik :-)

Hi, To begin with, the IQ 180 is not a 16-bit CCD sensor, the files it produces are 14 bit wide, and blown up to 16 bits in development. True 16 bit raw was developed for the IQ 3100 that uses a ...

Looking at Bill Claff's plots, we need to keep in mind that the horizontal axis is nominal. Looking deeper into the data, we may observe that full well capacity at base ISO is higher on the M11 ...

Quite sure that Fujifilm has no manufacturing capability for large CMOS sensors. I would suggest that Sony has most of the IP regarding sensor development. The X-Trans pattern is specific to Fujifilm.

Hi, GFX 100/100S and A7rIV/A7rV share the pixel design, with the GFX 100/100S having 68% more pixels. Having more pixels means less noise and more detail. Lenses taken into the equation, the lens ...

Hi Laci, Looks good to me! Carry on please! Best regards Erik

Hi, LoCA is most noticeable in out of focus areas, mainly as magenta/green. What you see may also bee lateral chromatic aberration. The undersize microlenses increase acutance, but would not cause ...

I would think that Sony's high resolution sensors (A7rII, A7rIV, GFX 100) are on a four year cycle, so I would expect a new sensor in 2023. The Sony A7rV may have been a bit out of cycle. The A7rIV ...

I would think that Diglloyd is pretty meticulous in his testing, so he observes a lot of issues most tester would not see. Of course, there are sample variations with gear. So, it could be that the ...

In that case, software compensation will be as good as a central ND, I would say. Best regards Erik

Hi, In low light, the center ND will loose even more light. So, you need to increase exposure to compensate. In that case and ND filter may not be beneficial. In good light, your exposure may be ...

Hi, I don't think resolution is very relevant, especially not in the digital era. The more important qualities may be 'acutance' and smoothness of the image. With film, there was always a huge ...

I would mostly agree, with some exceptions: (1) I don't think weight plays a big role, if I need that lens, but I think that a lens being small has real benefits.

May be. Your experience may be a bit congruent with mine. I use some Pentax 645 lenses (35 mm and 45-85 zoom), not on the GFX 100S but on an A7rIV that has very similar pixel design. I use those ...

What I would like to see was an 'aspect ratio dial': Would work this way: (1) Oversize sensor that can utilize the the full image circle with different aspects ratios.

Great points made! Best regards Erik

Well, it is a 60-600 zoom. You could use it on a GFX 100S in crop mode and it would yield the same result as the Sony A7rIV. But, the GFX 100S has more pixels than the A7rIV, so it would capture a ...

Interesting info, thanks for sharing! Best regards Erik

I always inspect a lens for exterior and scratchess. After that I would do something like Jim Kasson's screening test. I would object to major specks of dust inside a lens, but not really about ...