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Archive 2017 · Adapting Lenses to the Fuji GFX

  
 
Steve Spencer
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p.29 #1 · Adapting Lenses to the Fuji GFX


The bottom line is when it comes to portraits different people have different ideas about what they like and don't like. When people are trying to adapt lenses to the GFX they need to decide whether the lens creates a look they like or not. Bobby350z obviously like the look of the Canon 85L on the GFX. Others may not.

When adapting FF 35mm lenses to the GFX here are some basic questions to ask:

1) Does the lens cover the image circle? If not does the cropping bother you.

2) Does adapting the lens create field curvature and astigmatism? If it does, how is this going to affect your shots and the use of the lens?

3) Is the sharpness in the outer portion of the frame diminished? If it is how does that limit the use of the lens?

4) Is there higher chromatic aberrations in the outer portion of the frame? If there are how does that limit the use of the lens?

5) How is the coma in the outer portion of the frame? Does this limit the use of how the lens can be used.

6) How sensitive is the lens to flare? Is the hood being used with the lens adequate for the larger format? Is there a loss of contrast due to flare in some situations?

They key is understanding what limits you will face in using the lens on the larger format camera. Some lenses have very few limitations (e.g., Zeiss ZF/ZE 135 f/2 APO) other lenses have severe limitation (e.g., Zeiss Otus 28 f/1.4 APO). You can always crop a FF size image circle and the lens will perform much as it does on FF, but the point of having the larger sensor is to use it and the ideal is using a lens that works well with the sensor.



Aug 07, 2020 at 02:43 PM
engardeknave
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p.29 #2 · Adapting Lenses to the Fuji GFX


Steve Spencer wrote:
The bottom line is when it comes to portraits different people have different ideas about what they like and don't like. When people are trying to adapt lenses to the GFX they need to decide whether the lens creates a look they like or not. Bobby350z obviously like the look of the Canon 85L on the GFX. Others may not.

When adapting FF 35mm lenses to the GFX here are some basic questions to ask:

1) Does the lens cover the image circle? If not does the cropping bother you.

2) Does adapting the lens create field curvature and astigmatism? If
...Show more

These people never say "hey I shoot the 85L and I like it, but AF is borderline useless and sub-f/4 is soft as baby shit, and the bokeh looks weird and busy in this format, ymmv". They are like "I SHOOT THIS LENS AND ADAPTER AND IT IS AMAZING NO PROBLEMS PERFECT AF YOU SHOULD BUY IT TOO LOOK AT THIS PRETTY GIRL".



Aug 07, 2020 at 03:13 PM
Steve Spencer
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p.29 #3 · Adapting Lenses to the Fuji GFX


engardeknave wrote:
These people never say "hey I shoot the 85L and I like it, but AF is borderline useless and sub-f/4 is soft as baby shit, and the bokeh looks weird and busy in this format, ymmv". They are like "I SHOOT THIS LENS AND ADAPTER AND IT IS AMAZING NO PROBLEMS PERFECT AF YOU SHOULD BUY IT TOO LOOK AT THIS PRETTY GIRL".


My point is that for portraits all that stuff is subjective. How soft is too soft for portraiture? Opinions certainly vary and there is nothing wrong with that. Just what constitutes weird and ugly vs. artistic bokeh? Opinions certainly vary on that and again there is nothing wrong with that. I am sure those who post examples like the look (and not just because the particular picture is of a pretty girl) of the shots they post. If you don't that is fine. It is a subjective judgment and your opinion is just as valid as anyone else's. I do agree that from a low resolution image on the web final judgment of the quality of an image is hard, but I don't doubt that people who post images like the high resolution image even if you are pretty sure that you would not.



Aug 07, 2020 at 03:33 PM
bobby350z
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p.29 #4 · Adapting Lenses to the Fuji GFX


I understand that the point is to use the right lenses. That's why I use mostly use my GF lenses. But then there is nothing faster than the only 110mm f2. Everyones style is bit different. I do like shooting wide open even outdoors. I care less for the back ground. I am not documenting the location. Why not shoot in the studio, if I had 40x60 space with natural light and all my strobes and gear equipment, I would. Sometimes it is hard to understand why other photogs think that everyone else has to shoot the same way as them and one should be ready to call their crap as crap also.


Aug 07, 2020 at 04:17 PM
engardeknave
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p.29 #5 · Adapting Lenses to the Fuji GFX


Steve Spencer wrote:
My point is that for portraits all that stuff is subjective. How soft is too soft for portraiture? Opinions certainly vary and there is nothing wrong with that. Just what constitutes weird and ugly vs. artistic bokeh? Opinions certainly vary on that and again there is nothing wrong with that. I am sure those who post examples like the look (and not just because the particular picture is of a pretty girl) of the shots they post. If you don't that is fine. It is a subjective judgment and your opinion is just as valid as anyone else's. I
...Show more

Sharpness is universally desired, outside of a few nutjobs who don't understand post-processing. It is objectively measurable. There is just about unanimous agreement about what kind of bokeh is pleasant and which isn't. This is objectively measurable as well. If you fall outside of such a taste-consensus, then you know that your own preferences are likely different than those of others. That Petzval is weird, but I like it. You don't repeatedly and selectively post misleading images to affirm your own buying decisions.



Aug 07, 2020 at 04:23 PM
Steve Spencer
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p.29 #6 · Adapting Lenses to the Fuji GFX


engardeknave wrote:
Sharpness is universally desired, outside of a few nutjobs who don't understand post-processing. It is objectively measurable. There is just about unanimous agreement about what kind of bokeh is pleasant and which isn't. This is objectively measurable as well. If you fall outside of such a taste-consensus, then you know that your own preferences are likely different than those of others. That Petzval is weird, but I like it. You don't repeatedly and selectively post misleading images to affirm your own buying decisions.


Sorry I disagree. Sharpness for portraits I do not see as universally desired. More precisely if you say "the sharper the lens is for portraits the better." I think that view is far far short of being universally endorsed. As for bokeh, there is nothing like unanimous agreement about what is good bokeh. Some types of bokeh might get almost everyone saying it is bad, but that does not mean you will get anything like agreement on what is good. Take gaussian bokeh from a lens with APD elements. Some love that and see it as ideal bokeh. Others (including me) see it as too boring and too uniform. So I just don't agree that the sharper a lens is the better it is for portraits and I certainly don't agree that there is anything like unanimous agreement on what makes good bokeh.



Aug 07, 2020 at 04:55 PM
MAubrey
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p.29 #7 · Adapting Lenses to the Fuji GFX


engardeknave wrote:
Sharpness is universally desired, outside of a few nutjobs who don't understand post-processing. It is objectively measurable. There is just about unanimous agreement about what kind of bokeh is pleasant and which isn't. This is objectively measurable as well. If you fall outside of such a taste-consensus, then you know that your own preferences are likely different than those of others. That Petzval is weird, but I like it. You don't repeatedly and selectively post misleading images to affirm your own buying decisions.


Thing is, often times those two things are in opposition. The prototypically best bokeh is the result of under correction of spherical aberration...which lowers sharpness wide open.



Aug 07, 2020 at 04:56 PM
RustyBug
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p.29 #8 · Adapting Lenses to the Fuji GFX


MAubrey wrote:
Thing is, often times those two things are in opposition. The prototypically best bokeh is the result of under correction of spherical aberration...which lowers sharpness wide open.


+1

There are some extremely "sharp" lenses with terrible (subjective) nervous bokeh at certain shooting distances. While not everyone agrees on which or how much bokeh they desire / want / need ... there are some renderings that seem to be a bit more detracting than others. Swirly or other shape type bokeh, some find interesting, but I don't know too many folks that "like" nervous / double bokeh. Mosly, they put up with it in exchange for that sharpness ... taking their chances or learning to work around certain distances that make it most prominent.

How well corrected, how "sharp", how relaxed, how distorted, etc. ... all part & parcel to the drawing style of individual lenses. Imo, the question isn't whether or not a lens is sharp or how sharp it is or how much bokeh it has / hasn't, but what is the balance between all of its attributes. Nearly all optics are a series of compromises (some diametrically opposed) ... choose your poison(s).

So, where sharpness is a universal attribute, it is not the sole or dominant attribute for all concerned. Furthermore, which zone / zones (where) does that sharpness occur? Is it centrally weighted (which can make for some peaks), or is it more evenly distributed across the frame (and at what distances). Imo, there's far more to it than an overgeneralized, blanket statement can accurately present.



Aug 07, 2020 at 08:31 PM
engardeknave
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p.29 #9 · Adapting Lenses to the Fuji GFX


Steve Spencer wrote:
Sorry I disagree. Sharpness for portraits I do not see as universally desired. More precisely if you say "the sharper the lens is for portraits the better." I think that view is far far short of being universally endorsed. As for bokeh, there is nothing like unanimous agreement about what is good bokeh. Some types of bokeh might get almost everyone saying it is bad, but that does not mean you will get anything like agreement on what is good. Take gaussian bokeh from a lens with APD elements. Some love that and see it as ideal bokeh. Others
...Show more

Yes, and basketball players are not tall because you saw a child shooting hoops at a park. Let's break out those Canon 85/1.4 sales figures and compare to the Petval monolith that is taking photography by storm.

I don't even know why I'm still taking to you people. As if 90% of every lens review isn't about sharpness. Total insanity.



Aug 07, 2020 at 09:04 PM
rbf_
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p.29 #10 · Adapting Lenses to the Fuji GFX


RustyBug wrote:
+1

There are some extremely "sharp" lenses with terrible (subjective) nervous bokeh at certain shooting distances. While not everyone agrees on which or how much bokeh they desire / want / need ... there are some renderings that seem to be a bit more detracting than others. Swirly or other shape type bokeh, some find interesting, but I don't know too many folks that "like" nervous / double bokeh. Mosly, they put up with it in exchange for that sharpness ... taking their chances or learning to work around certain distances that make it most prominent.

How well corrected, how "sharp", how
...Show more

Yeah these characteristics have always been tradeoffs. In fact the new GF 80 f/1.7 is reported by Fujifilm to be designed for a different tradeoff than other typical GF lenses. I'm sure it will be very good.

"We were also told that these two lenses will have different characteristics. The 110mm will produce a very sharp image, while on the other hand the 80mm f/1.7 produce a "soft and warm image.... with bokeh that will be very soft and creamy". It will be up to photographers to decide which look they prefer - although the size difference may be crucial factor to many users."

https://www.digitalcameraworld.com/news/fujifilm-shows-off-superfast-80mm-f17-lens-and-35mm-f35-for-gfx-medium-format-cameras



Aug 07, 2020 at 09:20 PM
RustyBug
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p.29 #11 · Adapting Lenses to the Fuji GFX


engardeknave wrote:
Yes, and basketball players are not tall because you saw a child shooting hoops at a park. Let's break out those Canon 85/1.4 sales figures and compare to the Petval monolith that is taking photography by storm.

I don't even know why I'm still taking to you people. As if 90% of every lens review isn't about sharpness. Total insanity.


That can cut both ways.

Yes, sharpness is included in reviews ... as it should be. But, there are are plenty of other things to review on a lens as well. I'm not sure if you've ever checked out LensTip reviews, but their format punches down the line on different aspects, sequentially.

But, here's the thing ... its kinda like talking about sports cars. Sure, they all talk about speed, and how fast they can go. Rookie's think top end is what makes for a great sports car. Those who know sports cars know that there is a lot more than top end that makes a great sports car. If all you want to do is talk about speed of car A vs. car B ... well, for those who know that it is more than that, you wind up showing just how little you know by about sports cars by always talking about speed. Silly little things like handling, responsiveness, stability, braking, shifting, etc. might be something worthy too. Keep talking about speed, while dismissing the other things ... yeah, you probably should stop talking to other people, if that's the only one trick pony you want to pound on. Maybe there comes a time to start listening to other people, and stop talking about such a narrow focus ... SPEED, SPEED. SPEED I SAY !!! Dadgummit, you aren't listening to me. It's SPEED, I tell ya, SPEED, SPEED, SPEED. You guys don't know what you're talking about. You should be talking about SPEED. I don't know why I'm still talking to you ... (about SPEED).

If all you know about lenses is sharpness ... well, then you're kinda showing everyone just how little you know about lenses. Granted, most all of us probably STARTED learning about lenses by being focused on sharpness (I'm guilty as charged ). But, many progress beyond the sharpness thing, to realize that there are other attributes that can make (or break) a lens in different ways than sharpness can compensate for.

Nothing wrong with sharpness ... thinking that it is the holy grail of a lens may not be sage. Case in point ... my Nikon 28/2.8 AIS is sharper in the center than my Oly 28/3.5. However, my Oly is sharper in the corners than the Nikon. So, because the Oly has more even resolution across the frame, I prefer it to the Nikon for landscape type images. Whereas for central subjects (say floral), I may opt for the Nikon. Then, there's my C/Y 28/2.8 which kinda combines or splits the difference a bit, but is a bit better corrected, so the microcontrast is a bit more. Central sharpness on the Nikon still shreds, but it isn't as well corrected in all areas.

So, if you want to talk about sharpness, at least give credence to the fact that lens designs have to make decisions that influence favor different areas of the projected image ... oh, and at what distances. Not all lenses are optimized the same way for distances either.

It's not that seasoned veterans (particularly in the Alt Forum) aren't fully aware of sharpness. It's just that so many of them have progressed beyond that hyper-uber-pixel peeping sharpness discussion that it isn't a hyper focused discussion point. I mean ... ummm, this IS the Alt Forum. Sharpness is SOOOO mainstream thinking. No problem with such thinking ... but, ummm why would you be so put off by people in the Alt Forum, discussing things that are an ... oh, gee IDK ... an alternate to such mainstream hyper-focus on SPEED, SPEED, SPEED ... errr, I mean sharpness.

BTW, if you want to talk about Canon sales figures ... go to the Canon Forum (I shoot Canon, too). This is the Alt Forum ... get it, ALTERNATE, different from Canon (by Fred's definition for the Forum).

I don't mean to sound like a total jerk about this ... but, this is the Alt Forum. And, it is THE PLACE where I learned a whole lot about lenses a long time ago, from a whole lot of really knowledgeable and helpful people (some have since gone, some have stayed). If your mission is to TALK seasoned Alt Forum members into placing a hyper-focus discussion on sharpness ... well, pack a lunch, it'll be a long day.

I hope that makes a lick of sense ... SPEED, Man, SPEED. Don't you know it's all about SPEED.

Your call if you want to continue talking to these people. Also, your call if you want to start asking good questions and listening to these people. That doesn't mean you have to agree with everyone or everything. It doesn't mean you have to use or follow everything ... but, you just might learn a thing or two (which can also help you with better understanding your Canon glass, too) along the way.

So, if you want to take your basketball and go home (i.e. stop talking with these good folks), you can do that too. Keep pounding sharpness in the Alt Forum to seasoned, veteran Alt Forum members ... now that's real insanity, imo.

Either way ... your call.

HTH





Aug 07, 2020 at 11:03 PM
freaklikeme
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p.29 #12 · Adapting Lenses to the Fuji GFX


That's a whole lot of words to say, "Wrong forum, dude."


Aug 08, 2020 at 02:03 AM
RustyBug
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p.29 #13 · Adapting Lenses to the Fuji GFX


freaklikeme wrote:
That's a whole lot of words to say, "Wrong forum, dude."




Hopefully there are some "right ones" in there somewhere that might strike a chord. You guys helped me in here so very much, many years ago. I hope he takes a minute to to think about it. Not really trying to discourage, silence or send packin' ... but, rather "WAKE UP" ... you're in the land of some valuable information and some great people (even if he doesn't find it valuable yet today).

As to "wrong forum", it is a very right forum to learn from, imo ... the depth of knowledge in here is tremendous. But, only if one is willing to open their mind to it.



Aug 08, 2020 at 06:13 AM
Makten
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p.29 #14 · Adapting Lenses to the Fuji GFX


bobby350z wrote:
Sometimes it is hard to understand why other photogs think that everyone else has to shoot the same way as them and one should be ready to call their crap as crap also.


Yes, but that's also the reason that we need to make clear that a lens that suits one person, doesn't necessarily do it for everyone else. Hence my recurring posts about curvature of field with many (most) adapted lenses for the smaller format. I've been fooled myself to buy the Voigtländer 58 because I had no thought about it behaving badly at larger distance than all the example photos I saw. I'm sure there are other people here that benefit from getting to know such things, not just how awesome it is at MFD. That does of course not make it useless to everyone else (obviously).

engardeknave wrote:
I don't even know why I'm still taking to you people.


Nor do we.



Aug 08, 2020 at 06:47 AM
Steve Spencer
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p.29 #15 · Adapting Lenses to the Fuji GFX


engardeknave wrote:
Yes, and basketball players are not tall because you saw a child shooting hoops at a park. Let's break out those Canon 85/1.4 sales figures and compare to the Petval monolith that is taking photography by storm.

I don't even know why I'm still taking to you people. As if 90% of every lens review isn't about sharpness. Total insanity.


I wonder why you talk to us as well. The condescension drips from this post. If you think you are so much above us that all you can do is suggest that you know more, then why bother responding. By the way the basketball analogy does not apply at all. That applies when using exceptions to argue against descriptions of a category. I am talking not about exceptions, nor about description of a category, but about standards of judgment and whether those standards are objective or subjective. How much sharpness makes a portrait look good and how beautiful bokeh is are both subjective judgments. There are not right or wrong answers.



Aug 08, 2020 at 07:03 AM
RustyBug
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p.29 #16 · Adapting Lenses to the Fuji GFX


Steve Spencer wrote:
The condescension drips from this post.



Yeah, it's kinda like someone telling Van Gogh he didn't stay in the lines, when he painted "Starry Night".

Maybe a better thing to do would be to ask him why he chose or preferred to go outside the lines ... then, actually listen to what he says.

That doesn't mean you have to paint outside the lines just because someone else does, but at least you learn something about it along the way.





Aug 08, 2020 at 07:14 AM
buggz
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p.29 #17 · Adapting Lenses to the Fuji GFX


Did I happen to logon to a dpreview forum?


Aug 08, 2020 at 11:05 AM
dgurtch
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p.29 #18 · Adapting Lenses to the Fuji GFX


Several of our Condo Owners rent their units out in summer. It is so nice (and encouraging) to see families trying to enjoy their vacation during this damn pandemic. Here is a family crabbing at the end of our pier. GFX 50R.
Dave in NJ







Aug 08, 2020 at 02:48 PM
ftllens
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p.29 #19 · Adapting Lenses to the Fuji GFX


I have good news. The Samyang 85mm f/1.2 XP works pretty well on the 50 R. I don't know how to test for inwards field curvature so I shot a bunch of random distance. Tomorrow if I have the energy I will do some WO infinity landscape shots. Will upload soon


Aug 08, 2020 at 08:16 PM
Sauseschritt
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p.29 #20 · Adapting Lenses to the Fuji GFX


Makten wrote:
Compared to most ~50 mm lenses, yes. Compared to anything made for 33x44 or larger, no. It vignettes a lot and personally I find it useless for anything larger than 33x33 because of backwards curvature of field, which happens with 99% of all adapted lenses for 24x36 with shorter focal length than ~100 mm.

I've said it before and will say it again: DON'T be fooled by example photos shot at or close to MFD. That will mask any curvature of field and enlarge the image circle. If you only shoot at close range, many lenses are fine. But as soon
...Show more

Why, thanks for your answer ... but since when does field curvature matter for portraiture ?

It matters for stuff like document reproduction, sure - but for that I'd pick my AF 60mm f2.8 micro instead anyway.



Aug 08, 2020 at 09:53 PM
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