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Archive 2008 · MC Rokkor 85 1.7 and STF like blur.

  
 
Dim.ka_
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p.1 #1 · p.1 #1 · MC Rokkor 85 1.7 and STF like blur.


Have tried to do some mod to the rear lense group of the standart MC Rokkor 85 1.7. Some kind of centre filter idea, but on periphery part of the lense itself - like in original STF




All f1.7 + Canon 5D - small camera jpg ~4mpx.

Pic. a standart lense (exp.-0.7)
Pic. b modified lense (exp.-0.3)

Here is the test result.
a

b


a

b


a

b


Edited on Jan 06, 2009 at 05:11 PM · View previous versions
Oct 26, 2008 at 09:51 AM
cogitech
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p.1 #2 · p.1 #2 · MC Rokkor 85 1.7 and STF like blur.


I can definitely see the effect, particularly in 2nd and 3rd shots. It results in overall lower contrast, but that could easily be fixed in post processing.

Very nice!

I'm not sure if you remember our discussion earlier about this idea. At the time I mentioned trying to use my 55mm Hakuba "Spot Soft" filter for a similar effect. I tried it and it produced interesting results. I'll try to dig up some samples. If I can't find them, I'll shoot some more.

In the meantime, do you feel like explaining what you did?
Oct 26, 2008 at 10:04 AM
Dim.ka_
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p.1 #3 · p.1 #3 · MC Rokkor 85 1.7 and STF like blur.


Paul here is more visible where is the difference



now defocus looks like this



Important note - it could be done practically with every lense - next will try Rokkor 58 1.2


Oct 26, 2008 at 01:11 PM
Ed Sawyer
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p.1 #4 · p.1 #4 · MC Rokkor 85 1.7 and STF like blur.


That is a pretty intersting effect. How about one of those pierced-disc type things within the lens group, ala Imacon and/or the Fuji copy? That seemed to be an interesting way to get a soft-focus/modified bokeh type look also.

-Ed
Oct 26, 2008 at 03:58 PM
theSuede
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p.1 #5 · p.1 #5 · MC Rokkor 85 1.7 and STF like blur.


Exactly what have you done, mechanically? This seems really interesting, I have a few lenses whose total pictorial quality would definitely gain from having a softer WO defocus blur even at the cost of loosing some maximum brightness...
Oct 26, 2008 at 04:01 PM
Dim.ka_
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p.1 #6 · p.1 #6 · MC Rokkor 85 1.7 and STF like blur.


Ok guys - i will give my idea how to make it. It is quite simple and i get the even and appropriate result just from the first try on the real lense group.
here is the pic - other thing you need - An igniting match. Grill mesh is very essential thing it helps to make uniform darkening.

On this pic is shown a try on filter glass - to see how it works - it is not lense block itself
http://album.foto.ru:8080/photos/or/41852/334415.jpg


Edited on Oct 26, 2008 at 06:57 PM · View previous versions
Oct 26, 2008 at 04:08 PM
Dim.ka_
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p.1 #7 · p.1 #7 · MC Rokkor 85 1.7 and STF like blur.


Just test shot under fluorescent lighting - tommorow will try to do more interesting shots.
Oct 26, 2008 at 04:26 PM
Dim.ka_
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p.1 #8 · p.1 #8 · MC Rokkor 85 1.7 and STF like blur.


Sorry yet another test pic




Oct 26, 2008 at 06:54 PM
theSuede
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p.1 #9 · p.1 #9 · MC Rokkor 85 1.7 and STF like blur.


Excellent idea, using carbon soot to mask off a lens rim with a nice gradient!!! I'm genuinely impressed by your ingenuity!
Have to try this tonight...

Greetings from Sweden/ Joakim
Oct 27, 2008 at 07:30 AM
Dim.ka_
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p.1 #10 · p.1 #10 · MC Rokkor 85 1.7 and STF like blur.


Thanks the Suede - idea is old but you need to figure out how to make it right.




and few snaps outdoors straight out from the camera (5D small jpeg) - i can defenetly say it works - on the street it is more obvious, especially on far objects that are in the frame.
Oct 28, 2008 at 03:44 AM





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