My Experience with the Phase One XF 100

Discussions regarding Phase One XF and XT
Also lens discussion for Phase One, Schneider and Rodenstock lenses.

My Experience with the Phase One XF 100

Postby NN637046910659761690UL » Sun Sep 22, 2019 2:29 pm

I had the fortunate experience of doing a half-day shoot with the Phase One XF 100 camera. I never used another digital medium format camera. My main camera is a Fuji APSC camera. And it's not everyday that I get to use a $40k medium-format camera, so I figure I write my thoughts.

I was doing a beauty shoot. So the lens I used was the 150mm AF f/2.8 IF.
I was in a studio setting, so I didn't get to experience the magical "medium format bokeh." I was shooting at around F/20 so depth of field wasn't too big of a problem.
The Phase has 1 focus point in the middle. I was prepared for bad AF from all the stories I heard. It wasn't bad actually. The Phase emits a focus-assist light every time it tries to acquire focus. Maybe that helped? Because I had such a deep depth of field, focus recomposing was no problem. I also heard that the AF was improved from the old Phase cameras.

I couldn't rattle off shots like I could with my Fuji X-T2. In fact, since the RAW files were around 100 megs each, I could probably shoot about 1 shot a second. Even then, after like 10 shots, I had to stop for the buffer to clear.

That was the main thing I had to get used to. It forced me to slow down. I couldn't catch the model in her moment and keep her moving. She had to pause for each pose. Also I was using 8gig CF cards, and that thing filled up much quicker than I was expecting.
Last edited by NN637046910659761690UL on Wed Sep 25, 2019 8:29 am, edited 2 times in total.
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Re: My Experience with the Phase One XF 100

Postby tenmangu81 » Sun Sep 22, 2019 2:50 pm

Hi,

This forum is devoted to the software Capture One, and not to cameras. Anyway, I think you would not have such issues with the buffer if you had shoot connected, like most of people do when working in a studio.
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Re: My Experience with the Phase One XF 100

Postby SFA » Sun Sep 22, 2019 5:01 pm

As Robert has written already there are probably other forums that would be more appropriate for this post - assuming you do have a message to get across.

I would have thought that an 8GB CF card might not be a particularly fast card and not really the best option for shooting with a phase back. You don't mention which back was available to you.

But anyway, what were your impressions about the results the back (whatever it was) delivered?
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Re: My Experience with the Phase One XF 100

Postby NN635295556271985100UL » Sun Oct 06, 2019 1:56 pm

This forum is devoted to the software Capture One
l Really?
As far as I can see it also covers Phase & Leaf DBs and Cameras - hence the titles in the different sections.
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Re: My Experience with the Phase One XF 100

Postby Ulf » Thu Oct 17, 2019 10:34 am

As far as I can see it also covers Phase & Leaf DBs and Cameras - hence the titles in the different sections.


I will second that. This section is dedicated to Phase One XF and XT
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Re: My Experience with the Phase One XF 100

Postby Jon » Tue Oct 29, 2019 2:59 pm

NN637046910659761690UL wrote:I couldn't rattle off shots like I could with my Fuji X-T2. In fact, since the RAW files were around 100 megs each, I could probably shoot about 1 shot a second. Even then, after like 10 shots, I had to stop for the buffer to clear.

That was the main thing I had to get used to. It forced me to slow down. I couldn't catch the model in her moment and keep her moving. She had to pause for each pose. Also I was using 8gig CF cards, and that thing filled up much quicker than I was expecting.


I would simply add two things... Speed of the card is important - IQ backs use UDMA 7 writers, so if the card is slower than 120mb/s you won't be using the full speed the back is capable of. With a fast card, you will have much less buffering (and in many cases no buffering)

Capture rate on IIQ-L and IIQ-S files will be about 1FPS with the 100mp, and about 1.3s per shot with IIQ-L 16bit. (in contrast, IQ4 150mp can do nearly 3FPS in IIQ14S with no buffering ever to XQD)
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Re: My Experience with the Phase One XF 100

Postby NN635714915026101236UL » Mon Feb 01, 2021 3:45 am

NN635295556271985100UL wrote:
This forum is devoted to the software Capture One
l Really?
As far as I can see it also covers Phase & Leaf DBs and Cameras - hence the titles in the different sections.


Exactly. Where the Capture One software angle is coming from is beyond me. The topic is Phase One XF and XT.
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Re: My Experience with the Phase One XF 100

Postby NN635714915026101236UL » Mon Feb 01, 2021 3:48 am

NN637046910659761690UL wrote:I had the fortunate experience of doing a half-day shoot with the Phase One XF 100 camera. I never used another digital medium format camera. My main camera is a Fuji APSC camera. And it's not everyday that I get to use a $40k medium-format camera, so I figure I write my thoughts.

I was doing a beauty shoot. So the lens I used was the 150mm AF f/2.8 IF.
I was in a studio setting, so I didn't get to experience the magical "medium format bokeh." I was shooting at around F/20 so depth of field wasn't too big of a problem.
The Phase has 1 focus point in the middle. I was prepared for bad AF from all the stories I heard. It wasn't bad actually. The Phase emits a focus-assist light every time it tries to acquire focus. Maybe that helped? Because I had such a deep depth of field, focus recomposing was no problem. I also heard that the AF was improved from the old Phase cameras.

I couldn't rattle off shots like I could with my Fuji X-T2. In fact, since the RAW files were around 100 megs each, I could probably shoot about 1 shot a second. Even then, after like 10 shots, I had to stop for the buffer to clear.

That was the main thing I had to get used to. It forced me to slow down. I couldn't catch the model in her moment and keep her moving. She had to pause for each pose. Also I was using 8gig CF cards, and that thing filled up much quicker than I was expecting.


I've been using the Phase One XF with Blue Rings and IQ3 50 for many years and have never nailed the focusing issue. If the subject is still, I'm good. But the moment there is movement, I close down the aperture to about f/20, then manually focus on a predetermined spot on my studio floor...oh, and pray.
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Re: My Experience with the Phase One XF 100

Postby Ulf » Mon Feb 01, 2021 8:36 am

Many improvements have been done during the life span of the XF,
Both the sensor in it self which can be upgraded to the HAP-2 generation sensor.
Also the algorithms and sensor calibration.
The latest one is from the 19th of October 2020.
If you calibration is older than it can be very much worthwhile to have it serviced.

Calibration data and AF sensor type can both be seen in the About menu on the camera body.
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Re: My Experience with the Phase One XF 100

Postby Sa'd Tilghman » Wed Feb 03, 2021 3:59 am

Hello Ulf,

My AFCal for my XF with HAP2 reads:

AF: HAP2
AFCal: 11.01.2018
HW: 4

Is it time for a servicing? Thanks in advance.
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Re: My Experience with the Phase One XF 100

Postby Ulf » Wed Feb 03, 2021 3:25 pm

Might be worth while...
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