Mamiya 645 AFD and FD canon 85 1.2

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Archive 2009 · Mamiya 645 AFD and FD canon 85 1.2

Dim.ka_
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p.1 #1 · Mamiya 645 AFD and FD canon 85 1.2

Ok, for those of you who ever wonder what would be if we take really fast lens and use it on the larger sensor area

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At the moment, this convertion is in the middle stage and the far focus is about 3 meters - need to trim Mamiya mirror and position the lens in its mount a bit deeper inside the mirror box, in order to achieve infinity focus and need to make a new aperture control lever or ring. I just want to know, would this lens cover the larger sensor area and what drawing it will show.

The result really amazed me in terms of double character of the lens. It could be more pronounced then the Oly OM 55 1.2 and it could defocus the background like 200mm 1.8

So here are just test snaps handheld so it is possible that there are some mis-focused and out of focus objects (I have already bought microprism screen and will install it when the mirror will be trimmed)

Mamiya 645 AFD + Canon FD85mm f1.2

wideopen Velvia 50

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bigger size

wideopen
Kodak ektar 100 (120)

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stopped down arround f4-5.6

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check the same scene with fast normal primes here

samples from the 50mm group

So here is 55-58 group

double click to enlarge

http://www.fredmiranda.com/forum/topic/763806

May 13, 2009 at 06:24 PM

joeisayo
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p.1 #2 · Mamiya 645 AFD and FD canon 85 1.2

The images look very similar to my 85L II with an extension tube at the closest focusing range.

May 13, 2009 at 07:28 PM

Dim.ka_
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p.1 #3 · Mamiya 645 AFD and FD canon 85 1.2

Do not forget the field of view is like 50mm lens on 35 format, but the defocus if you have 50mm f0.7-0.8

May 13, 2009 at 07:37 PM

pentaxshooter
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p.1 #4 · Mamiya 645 AFD and FD canon 85 1.2

This is beyond awesome. I would have never expected that to cover the 6x4.5 frame. Tooo awesome.

May 13, 2009 at 08:47 PM

wayne seltzer
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p.1 #5 · Mamiya 645 AFD and FD canon 85 1.2

Great job Dimtry!
Sounds like a lot of work but well worth it.
I really like the dandalion shot. Incredible.

May 13, 2009 at 09:00 PM

ulrikft
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p.1 #6 · Mamiya 645 AFD and FD canon 85 1.2

Very cool indeed!

May 15, 2009 at 04:37 PM

sirimiri
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p.1 #7 · Mamiya 645 AFD and FD canon 85 1.2

Impressive amount of work. I bet it would make engineers who worked on both pieces of equipment happy, to know they someone is tinkering with their work, adapting to new and heretofore unthought of uses. "Homebrew" as they say.

As Pentaxshooter said, I'm impressed there's enough image circle!

May 15, 2009 at 05:17 PM

ovredal73
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p.1 #8 · Mamiya 645 AFD and FD canon 85 1.2

You never stop amazing me Dmitry - that is a feat for the books. Wow.

May 15, 2009 at 09:34 PM

GoGoGoGo
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p.1 #9 · Mamiya 645 AFD and FD canon 85 1.2

Wonderful look in these images, beautiful really beautiful.

May 15, 2009 at 09:59 PM

Ed Sawyer
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p.1 #10 · Mamiya 645 AFD and FD canon 85 1.2

it is impressive it covers the image circle, which must be what, about 75mm?

nice work!

-Ed

May 16, 2009 at 02:48 AM

fourfa
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p.1 #11 · Mamiya 645 AFD and FD canon 85 1.2

I always suspected from the total lack of falloff at f1.2 (I'm ALWAYS adding vignetting with my EFII lens) that it has a much-larger-than-35mm image circle. Very interesting!

May 17, 2009 at 10:24 PM

RyanFlynn
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p.1 #12 · Mamiya 645 AFD and FD canon 85 1.2

freaking awesome. ~50mm ~f/0.7? yes, please!

May 19, 2009 at 01:55 AM

deepbluejh
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p.1 #13 · Mamiya 645 AFD and FD canon 85 1.2

I'm curious as to how much frame coverage you're getting.

May 19, 2009 at 08:22 PM

Dim.ka_
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p.1 #14 · Mamiya 645 AFD and FD canon 85 1.2

There is one trick - it is possible to use this combo if you remove the last lens element - which is the element of floating design and it is very useful in 35mm format. In this case you have 100% coverage without any sign of the vignetting wide open.

here is the light box for slide viewing

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May 19, 2009 at 09:23 PM

Dim.ka_
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p.1 #15 · Mamiya 645 AFD and FD canon 85 1.2

So finally finished - have shaved the mirror about 7mm - really hard task, the mirror is thick and have aluminium base plate.
will try to show more samples from this combo, but after all these 10 fast 50-58 f1.2 that i have tried - this one is out of this world - it is 2 (or more) times extraordinary then Oly 55 1.2

Check this out - it is absolutely crazy - under direct sunlight without hood

wideopen
Kodak ektar 100 (120 film)

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May 26, 2009 at 08:10 PM

Dim.ka_
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p.1 #16 · Mamiya 645 AFD and FD canon 85 1.2

Here is something between f1.4-f1.8

Kodak E100G

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May 27, 2009 at 08:33 PM

Dim.ka_
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p.1 #17 · Mamiya 645 AFD and FD canon 85 1.2

wideopen

kodak e100g

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May 28, 2009 at 08:23 AM

Graham Mitchell
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p.1 #18 · Mamiya 645 AFD and FD canon 85 1.2

Wow, very interesting indeed. Makes me want to try this with my digital back on the Mamiya! Please let me know if you ever bring this kit to Tallinn. Would be great to see it in person and meet such a passionate gear head

May 28, 2009 at 11:46 AM

ovredal73
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p.1 #19 · Mamiya 645 AFD and FD canon 85 1.2

Wow, you really need a specific point for sharpness reference or else the whole image might appear soft at these extraordinarily wide apertures. Last couple of shots almost feels like a lensbaby. This stuff is never-seen-before material - very cool, Dmitry.

May 28, 2009 at 11:59 AM

Ed Sawyer
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p.1 #20 · Mamiya 645 AFD and FD canon 85 1.2

Wild stuff! It looks like the front-bokeh (foreground) has strong biotar-type characteristics, very swirly, while the rear-bokeh is a lot like OM 55/1.2 with a heavy dose of cat-eye type stuff showing too. Very cool!

so, do you have to remove the rear floating element to get full coverage of the image circle? Or can you get full image circle coverage w/o removing that?

-Ed

May 28, 2009 at 12:57 PM

biotar
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p.1 #21 · Mamiya 645 AFD and FD canon 85 1.2

Now there is a conversion which i haven't even fantasised about. How did you come up with it.

great work!

May 28, 2009 at 02:00 PM

Dim.ka_
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p.1 #22 · Mamiya 645 AFD and FD canon 85 1.2

Graham, thanks i defenetly let you know if i go to Tallinn. Do you have mamiya adapter for your DIGITAL BACK? I quess the best result will be with Phase One P65+ since it is almost the full frame back and i really want to find out what the defocus would be with the such huge image capture area.

Andre, i really like the creamy/fat defocus at certain focus distances. At this point i am still studying how to get the best result out of this combo, hope there will be more perfect pics, soon. (Already find out that it needs more contrasty film like velvia/provia not the Ektar or Kodak)

Ed, actually it is not quite biotar type lens, every fast lens with huge sferical front glass will make the same swirly foreground or even the whole image.
check this
rokkor 85 1.7
__http://album.foto.ru:8080/photos/or/41852/560189.jpg

pentax 50 1.2
__http://album.foto.ru:8080/photos/or/41852/561909.jpg
rokkor 58 1.2 the same ef canon 50 1.4 and others

and yes i have removed the rear floating element. I will check the frame coverage with normal ef converted fd 85 1.2L. It is easy to check with white a4 office paper (just draw the rectangle with 645 frame sides and take the lens in hand and move it closer to the paper at the lens infinity focus position).

biotar, i really like idea to have fast lens with the larger image area and this lens has all what i need for such convertion - also it is possible to convert 135mm or 180mm lenses from 35mm format for medium format cameras.

May 29, 2009 at 08:21 PM

Dim.ka_
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p.1 #23 · Mamiya 645 AFD and FD canon 85 1.2

So few thoughts

the drawing is like you have normal 50mm f1.2 lens but multiply the effect by 2.7 times (image area is bigger than 35mm format by 2.7 times)

The result greatly depends from the focusing distance

here is close focus - pretty smooth

wideopen/ kodak e100g

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here is more farer focusing distance

wideopen/ kodak e100g

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Edited on Jun 04, 2009 at 01:27 PM · View previous versions

May 29, 2009 at 08:29 PM

Graham Mitchell
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p.1 #24 · Mamiya 645 AFD and FD canon 85 1.2

Dim.ka_ wrote:
Graham, thanks i defenetly let you know if i go to Tallinn. Do you have mamiya adapter for your DIGITAL BACK? I quess the best result will be with Phase One P65+ since it is almost the full frame back and i really want to find out what the defocus would be with the such huge image capture area.

No, but I'm on the lookout for a cheap Mamiya adapter. Would be fun to use the Mamiya as an experimental platform for things like this. Hopefully we could put all the gear together some day.

I'd love to have a 645 size back but can only offer you 48x36mm at this stage

May 29, 2009 at 10:07 PM

Dim.ka_
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p.1 #25 · Mamiya 645 AFD and FD canon 85 1.2

Thanks Graham for your kind offer.

Here are more exotic pics. They have insane look - i really like it

wideopen

Jun 03, 2009 at 11:53 PM


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