Fujifilm GFX 50S: Four Sensors in One? and an Interview With Dan Bracaglia of DPReview: UPDATED!

image courtesy of Meshmag

Mesh Mag might have figured out how Sony is producing medium format sensors affordably for cameras like the Fujifilm GFX 50S and Hasselblad X1D. It looks like Sony is merging 4 smaller sensors together to make one large sensor. I wonder what the limitations of this technology are because we could see some affordable huge sensors in the near future.

This could also explain some of the properties of this class of medium format sensors, like how sensor readout speed is prioritized and limited at times. It could also be what prevents the sensor from outputting a 4k video. I wonder if we will ever find out what four sensors were merged to make the excellent GFX sensor (They are just about m43 sized). You can read Mesh Mag’s translated write up here. I will try to reproduce their results in the near future and report my findings.

I ran the test myself and it seems my sensor doesn’t really show the 4 parts of the sensor until running the test for 16 minutes. The 8 minute test is barely visible even at 100% and if you use long exposure noise reduction the frame becomes very clean with +5EV and +100 White in Lightroom. All of these images are flat black when first imported. It appears that the biggest advantage of using long exposure noise reduction comes from when you need to adjust exposure after the fact.

I want to apologize for placing so many FujiAddict watermarks on the image, but a site that doesn’t have a GFX has been copying my posts. It seems not all GFX sensors are created equally. I am curious if there are any cameras out there that can go longer than 16 minutes without showing the parts of the sensor.

Interview with Dan Bracaglia from DPReview about the GFX. Apparently their review will be done sometime next week.

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Fujifilm GFX 50S: B&H Photo / Amazon / Adorama
Hasselblad X1D-50c: B&H Photo / Adorama

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  • Ros Kavanagh

    This type of image from a long dark exposure is not surprising, I’m still using an Aptus 75 bought in 2006 that would display similar characteristics when exposed this way. Any uniform image, say of a flat monochrome surface, pushed a couple of stops, makes it easy to see the construction of the sensor from smaller elements abutting one another. Never a problem with long focal lengths but with wide angle lenses (especially when shifted) you have to shoot a lens cast calibration file if the division is visible. That said, the GFX seems to have been pushed an extreme amount in this case and can’t see it being a problem at all.

    • I don’t think it will be an issue for anyone, but I do find it interesting that I had to shoot an exposure twice as long to get a similar result. It hints that there may be some variation.

  • doge

    A real test would be to now do the same thing with the new hasselblad camera, and a pentax 645z, one of the traditional hasselblads, and a phase one, and a leica, etc… See what all those sensors do after 8 minutes.