p.27 #1 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
RustyBug wrote:
Aperture size and f/stop are not the same thing.
A 400mm lens with an f-stop of f/4 has a (theoretical) aperture of 100mm
A 50mm lens with an f-stop of f/4 has a (theoretical) aperture of 12.5mm
100mm @ f/16 = 25mm
50mm @ f/16 = 3.125
Which (theoretical) aperture do you think will induce more diffraction (for a given format / distance of projection from the aperture to the film plane)?
The 50 with of the smaller aperture size. But the data I've been looking at is results from the 16-55, 18-55 and the two versions of the 35 on the Fuji X series. Even lenses of the same focal length at same f/stop perform differently with same system with same flange distance and sensor. I find that interesting
p.27 #2 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
The flange distance is not the location of the physical aperture (where diffraction is induced). That, and lens design (too much weeds) does have an influence (probably regarding exit pupil distance) ... but that's getting a bit deeper than my crude math works for.
The mMF Fuji seems to have the same width to that of the XT2. The grip is thicker, and the thickness of the main body is also very similar to that of the XT2 which is 33mm, probably 35mm. The main difference is the rear LCD which protrudes about 22mm from the main body.
p.27 #4 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
RustyBug wrote:
The flange distance is not the location of the physical aperture (where diffraction is induced). That, and lens design (too much weeds) does have an influence (probably regarding exit pupil distance) ... but that's getting a bit deeper than my crude math works for.
I don't personally feel anyone has fully reconciled the crude math so don't feel bad
p.27 #6 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
naturephoto1 wrote:
Hi Charles,
The camera is certainly much deeper than I had anticipated.
Rich
To be honest I am amazed as I have my XT2 sitting in front of me as I am correlating the measurements and feel. I suspect to weight will be the same as Hasselblad around the 725gm mark, as my understanding is they used materials to keep the weight down,
There are many more facts to understand and for Fuji to present, but I am very interested. Pricing level will be very important too.
p.27 #7 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
rbf_ wrote:
I don't personally feel anyone has fully reconciled the crude math so don't feel bad
Oh, I've done it years ago (physics / optics experiments in both diffraction and optical projection design math) and had to fully reconcile it (my teacher and his twin brother were former night vision physicists for the Pentagon) to the nth degree. My brain just doesn't want to work that hard anymore (and my memory is highly diffracted )... so I just use the crude (conceptual principles) math instead.
p.27 #8 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
naturephoto1 wrote:
Hi Charles,
The camera is certainly much deeper than I had anticipated.
Rich
True. However, the extra bump could perhaps give us better heat dissipation and a much larger battery.
The more I read about this camera, the more I like it. The lenses look to be very well designed being weather-sealed and having an aperture ring on them. In only a year, Fuji will have a complete system with lenses ranging from 18mm to 100mm (35 equiv.) and they are not slow lenses.
We need more info about it. It seems to be ~800 grams with battery which is similar to the Hassy X1D's weight.
Touchscreen LCD? EFCS? Dual card?
I'm really hoping for a 5-6K price for the body only.
p.27 #9 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
On the one hand,
1. Incredible selection of fast, great lenses from Sony, Zeiss, etc
2. BSI sensor
3. 4k video
4. phase detect AF
5. IBIS
6. Already in the system
On the other hand,
1. Slightly larger sensor
2. Maybe medium format look
3. Slow, contrast detect AF. Gotta wait years for fast phase detect AF
4. Heavier and bigger
5. Need to wait for lens build out all over again
6. Sensor development will lag the FF sensor
7. Need to invest $10k to enter
8. 4k video ?
9. No IBIS
Based on this list, I'm pretty sure I won't be switching. I've been patiently waiting for improved AF and video in FE, I'm not sure I want to start the wait all over again. I wouldn't mind adding it to my collection at 30% off once it hits the B&S board. I encourage all of you to go buy one .
p.27 #10 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
The comparison is quite different in my case. My investment with FF bodies and lenses is about that of the Fuji mMF with one lens and XT2 with 4 lenses. Weight, size and cost is a big factor for most of my travel photography while closer to home having the mMF Fuji would be great. The design and ergonomics is almost identical to that of the XT2 and the Fuji colors and rendition would be consistent.
p.27 #11 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
Canon TS-E lenses have a 67.2mm image circle. (50% greater than full frame area).
If an adapter becomes available, would it be possible to use the TS-E 17/4L for a 13mm equiv. field of view with some limited movements? That would definitely be a serious consideration.
p.27 #12 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
Charles, I am happy for you, you definitely should get this. Since you were shooting Leica before, this will be a budget system for you This is a system for photographer.
Fuji is really focused and doing their best for their customer sake. Look how their APS-C grow, steady and firm. And their camera is really build for photographer, they are improve the product after sale through firmware update. They don't change their philosophy because hot maket of FF MILC. They serve their customer, even with this system. Yeh, even grabbing your money, Fuji did it more gracefully.
I am not even a Fuji shooter saying this
charles.K wrote:
The comparison is quite different in my case. My investment with FF bodies and lenses is about that of the Fuji mMF with one lens and XT2 with 4 lenses. Weight, size and cost is a big factor for most of my travel photography while closer to home having the mMF Fuji would be great. The design and ergonomics is almost identical to that of the XT2 and the Fuji colors and rendition would be consistent.
p.27 #13 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
GMPhotography wrote:
I'm not wrong look at the micron size of the pixels They range IQ 180 at 5.2 and there 100mpx at 4.4. Than go check out that is some 35 mpx sensors. Endless debate but your not factoring in the very small pixel pitch of MF sensors. Now if I'm wrong than everyone at Phase One is wrong. Now if you still think I'm wrong I'll connect you to Phase One.
Feel free to ask Phase One for their opinion of your notion that you can safely use smaller apertures on smaller sensors and that you must avoid them on larger sensors.
I'll wait.
For the record, the notion that the size of photo sites bears any relationship to the amount of diffraction blur produced by lenses is wrong and it betrays a misunderstanding of how digital sampling works.
For example, if you take two otherwise identical photograph of a scene — same subject, same lens, same aperture, same camera (or equivalent) — but with sensors whose photo site density differs and you then make identically sized prints from the two sample images, there will be exactly the same amount of diffraction blur in both prints. There is not "more diffraction blur" in the sample with higher photosite density.
p.27 #14 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
GMPhotography wrote:
Beg to differ. Don't care what anyone says. I lived it. Case closed
I shot MF digital backs for years it don't work like film. Once again a typical 35mm setup with great lens it's about F11. In MF with a full frame digital back and a great lens it's F8 when diffraction hits. Pixel pitch also plays a roll for sure. Why part of the complaint of MF is loss of DoF one reason is diffraction the other everything is bigger. I test this stuff let's not forget. I spent hundreds of thousands in MF digital. I know what wall I'm hitting...Show more →
Sorry Guy, you are wrong. If you feel diffraction hits at F11 first, something is wrong with your setup. I have also tested different formats a lot, and for typical pixel pitches now for 35 mm format(36-50mp resolution) I can see diffraction starting at f/5.6 At F/8 it is obvious.
p.27 #15 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
zhangyue wrote:
Charles, I am happy for you, you definitely should get this. Since you were shooting Leica before, this will be a budget system for you This is a system for photographer.
Fuji is really focused and doing their best for their customer sake. Look how their APS-C grow, steady and firm. And their camera is really build for photographer, they are improve the product after sale through firmware update. They don't change their philosophy because hot maket of FF MILC. They serve their customer, even with this system. Yeh, even grabbing your money, Fuji did it more gracefully.
I am not even a Fuji shooter saying this
Thanks Michael I now have two XT2 bodies and I love the feel with the Fuji system. I think too often we look at the best sensor and the lenses are an after thought. With Fuji regardless how the great sensor with the GFX 50s may prove to be, it is the lenses in combination with the system is what will make the system work. Many working pros just want the system to work and not play around with too many after market lenses. Great to have choices but no fun messing around too much.
I do think Fuji have the right balance and they understand that the core base of lenses must be available at the time of release.
I love just having 2 or 3 favourite lenses that I know work and have fun taking shots
p.27 #16 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
charles.K wrote:
Thanks Michael I now have two XT2 bodies and I love the feel with the Fuji system. I think too often we look at the best sensor and the lenses are an after thought. With Fuji regardless how the great sensor with the GFX 50s may prove to be, it is the lenses in combination with the system is what will make the system work. Many working pros just want the system to work and not play around with too many after market lenses. Great to have choices but no fun messing around too much.
I do think Fuji have the right balance and they understand that the core base of lenses must be available at the time of release.
I love just having 2 or 3 favourite lenses that I know work and have fun taking shots
p.27 #17 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
Fred Miranda wrote:
Canon TS-E lenses have a 67.2mm image circle. (50% greater than full frame area).
If an adapter becomes available, would it be possible to use the TS-E 17/4L for a 13mm equiv. field of view with some limited movements? That would definitely be a serious consideration.
So Fred, from these specs, can you tell me the image circle of the N 85?
p.27 #18 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
Tariq Gibran wrote:
I'm also interested in it if other MF lenses are adaptable. Sounds like the price might be between 5-6K initially.
This 50MP Sony sensor has been on the market for quite a while already (coming up on three years) and by the time this Fuji hits the market (maybe February 2017 would be my guess), I sort of suspect we will be seeing a higher MP version of this sensor released.
From what I read, this is an entirely Fuji made sensor. But idk.
p.27 #19 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
gdanmitchell wrote:
For the record, the notion that the size of photo sites bears any relationship to the amount of diffraction blur produced by lenses is wrong and it betrays a misunderstanding of how digital sampling works.
I totally understand and agree with this point. However, we buy higher resolution cameras because we want higher system resolution. Sometimes it is interesting to know the relationship between sensor resolution, diffraction blur and system resolution. A given amount of diffraction blur will never give lower system resolution with a higher resolution sensor, but a smaller amount of diffraction blur will increase the system resolution more on the high resolution sensor than on the low resolution sensor.
p.27 #20 · Pre-order: Fujifilm GFX 50S Medium Format body ($6,499)
Fred Miranda wrote:
Canon TS-E lenses have a 67.2mm image circle. (50% greater than full frame area).
If an adapter becomes available, would it be possible to use the TS-E 17/4L for a 13mm equiv. field of view with some limited movements? That would definitely be a serious consideration.
It wouldn't just be limited movements - 67.2mm is huge, large enough to cover 645, and larger than you actually need for 12mm shift on full frame. Using the full image circle you would be able to get about +/- 9mm vertical shift and +/- 7mm horizontal shift on a 44x33 sensor!
n.b. the numbers in my original post were based on the image circle used at full shift on full frame.
)... so I just use the crude (conceptual principles) math instead.