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Are you "aware" of different M8/9 bokeh?


BKK dan

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Jayzuss!

 

On the original question - Yes, I notice a difference using a 75 f/2 on the M9 compared to a 50 f/2 on the M8 (both serving as short portrait telephotos of about a "70mm" field of view).

 

All other things being equal (subject distance, framing, aperture) the 75/M9 combo:

 

1) produces a bit more blur for a given background distance.

 

2) produces a smoother blur, because the 50 'cron's bokeh tends to bright-ring circles with harder edges @ f/2. A difference in the basic output of the different lenses.

 

OTOH, M8 shots with a v.3 Mandler 28mm @ f/2.8 and M9 shots with a v.4 Mandler 35 'cron @ f/2.8 generally produce similar bokeh "look" (some bright rings) - although the 35 blurs the background more overall (slightly).

 

Realistically, the 75/50 difference is the most noticeable and is one where I make the most use of the M8/M9 difference. Otherwise, comparing, say, a 90 on the M8 with a 135 on the M9, or my 21 on the M9 with the c/v 15mm on the M8, I don't worry too much about, or notice significant, differences between the camera/lens combos.

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It is my understanding that different lenses have different Bokeh signatures, so comparing 50/75 lens combination would about the same as comparing a 50 Cron to a Noctilux, on the same body. The difference in the question, is how the M8 would react differently than the M9, I would guess, with the same lens.

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Please stop misquoting me and putting words in my mouth.

 

Misquotes are the stuff that make this Forum fun to read, Jaap :D

 

How dull it would be if we would all quote each other correctly and then agree with everything :eek:

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i) I we use a visoflex all our bokeh problems will disappear instantly:D

 

ii) I have sent a notification to the powers that be. Which is my first. Hateful tosser.

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i) I we use a visoflex all our bokeh problems will disappear instantly:D

 

 

True, add the bellows and a 135mm tele-elmar and you get:

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... being deliberately misinterpreted and accused of saying things one did not say by quotes with omissions is rather wearisome. :(

Jaap, so you want to say that these: "if you have a photograph pin sharp from foreground to horizon [...] you will see no bokeh at all" were not your own words? (omission by me as indicated)

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Yes- and you interpret it to be that I am saying there is zero bokeh, thus quantifying the concept. I am not - I am just saying you won't be seeing it - that is all. If you disagree with that we must agree to differ.

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Interestingly in mathematics (group theory etc.) one of the few universal concept is zero, as in absent, no, nothing; and not visible, unimportant, negligable (for physicists).

 

Concerning the OP yes the bokeh will be different, as it is directly related to the DoF which will also be different. In general the bokeh on the M9 will be more pronounced as less things will be "in focus" all else being equal. The main problem is that no-one really knows what to compare with what........ For example, should you compare a 35 mm lens on the M8 with a 50 mm lens on the M9 (same field of view roughly), or should you compare the same focal lenght but on different camera's?

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For example, should you compare a 35 mm lens on the M8 with a 50 mm lens on the M9 (same field of view roughly), or should you compare the same focal lenght but on different camera's?

 

That's the real question, since the lens has it's own "finger print" does changing the lens NULL and VOID any testing? Should one use the same lens, and switch bodies?

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Guest mc_k
Interestingly in mathematics (group theory etc.) one of the few universal concept is zero, as in absent, no, nothing; and not visible, unimportant, negligable (for physicists).

 

...

 

I think you mean ring theory for the zero you're thinking about...a group just has a unit ( "1" ).

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Guest mc_k
...

Concerning the OP yes the bokeh will be different, as it is directly related to the DoF which will also be different. In general the bokeh on the M9 will be more pronounced as less things will be "in focus" all else being equal. The main problem is that no-one really knows what to compare with what........ For example, should you compare a 35 mm lens on the M8 with a 50 mm lens on the M9 (same field of view roughly), or should you compare the same focal lenght but on different camera's?

 

I think this is about the best answer you are going to get...

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I think this is about the best answer you are going to get ...

Poor original poster if a wrong answer really was the best he's gonna get ...

 

 

Concerning the OP yes the bokeh will be different, as it is directly related to the DoF which will also be different.

You are confusing lack of DOF and bokeh again :mad:

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Why would bokeh change if the lens remains the same on the two bodies? If it produces doubled lines or sharp edges on bright OoF areas, the lens will show the same with both bodies.

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Why would bokeh change if the lens remains the same on the two bodies? If it produces doubled lines or sharp edges on bright OoF areas, the lens will show the same with both bodies.

 

Because you are at different distance from your subject. On the M9 you need to be closer to your subject to fill the same proportion of your frame, given the same focal length.

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Because you are at different distance from your subject...

You have to stay at the same distance to do valid comparisons. Same lens, same subject distance, same aperture = same bokeh.

Edit: Not that changing subject distance will change bokeh a lot though. Doubled lines will remain doubles lines. But perspective and DoF won't be the same so the 2 pics will look significantly different.

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