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02-15-2016, 06:22 AM   #1
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Is there any faster than f=2.4 lens for 67 system?

Just wondering:
I saw some Russian gigantic lenses - extra rare and too big and strange.
I wonder is there any Carl Zeiss for example or other lens adopted to P67 mount that is at least f=2 (I'm not even dreaming on f=1.4).

Something (any brand) that fits P67 mount and Is f=2 or f=1.8
Like 90mm/2
Anything?

Thanks.

Some examples of strange lenses:
http://www.ebay.pl/itm/Ultrafast-Russian-1-8-140mm-lens-for-Pentax-67-6x7-Ma...-/291411062992

Anyway:
What are 3rd party lenses options for P67? (if any?)

That one is crazy:
http://www.dpreview.com/forums/post/29775108


Last edited by MorgothV8; 02-15-2016 at 06:36 AM.
02-15-2016, 07:02 AM   #2
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I can't say. But that 240/1.2 is a crazy lens! Do you shoot the 105/2.4 at f2.4 much? I shoot my 105/2.4 at f2.8 often and that yields pretty shallow DOF at close range.
02-15-2016, 07:07 AM   #3
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yeah I have heard of the zoomatar 240mm f/1.2. That lens would have been had the weight of four bricks lashed together with duct tape. There was the Ermanox, which was a 645 plate camera with a fixed 10.5cm f/1.8 ernostar lens was remarkably fast for such a large format in 1924:


But nothing that fast has ever been commercially produced for medium format in the past 70 years. On LF there are some Aero Ektar* lenses that are suited for use on 4X5 cameras a f/2.5 are very fast, that is one way of getting even shallower effective DOF than a 50mm f/0.95 lens on 35mm.


* Early versions of these lenses are viciously radioactive.

Last edited by Digitalis; 02-15-2016 at 07:37 AM.
02-15-2016, 07:15 AM   #4
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That one is just a crazy beast.
I rather mean something normal like 90/2 or 100/2 or maybe 90/1.8 etc.
Yes I shoot quite a lot with 105/2.4 at f=2.4.

Just during the evenings, with artificial light....
And I'm on edge of possibility to make a photo with Portra 400 or even 800, at 1/125 or 1/60 with f=2.4
I mean handheld without flash.

02-15-2016, 10:13 AM   #5
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QuoteOriginally posted by MorgothV8 Quote
That one is just a crazy beast.
I rather mean something normal like 90/2 or 100/2 or maybe 90/1.8 etc.
Yes I shoot quite a lot with 105/2.4 at f=2.4.

Just during the evenings, with artificial light....
And I'm on edge of possibility to make a photo with Portra 400 or even 800, at 1/125 or 1/60 with f=2.4
I mean handheld without flash.
Nope f2.4 is it in the Pentax 6x7 world. Anything faster is going to result in a much bigger 6x7 lens, which to start with are already heavy. That would make hand holding out of the question.

Best get your tripod out!

Phil.
02-15-2016, 10:43 AM   #6
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The 140mm isn't even really an MF lens but rather a projection lens. Kinda reminds me of the insanely fast X ray lenses some have mounted onto film/digital:

Kowa 65mm f/0.75 X-Ray Lens Mounted on a Nikon D90

Wide open, I'd expect similarly underwhelming results, and you'd have to create your own aperture solution.
02-15-2016, 11:28 AM   #7
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OK, that's why I've asked.
I was googling some time, and found nothing.
02-16-2016, 11:23 AM   #8
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Hasselblad 110 2.0

02-16-2016, 02:17 PM   #9
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QuoteOriginally posted by thomasfallon Quote
Hasselblad 110 2.0
You can certainly use that lens on 645 with an adaptor, but pretty sure it's not going to cover 6x7 (and thus no adaptors available for that combo).
02-16-2016, 06:36 PM   #10
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QuoteOriginally posted by thomasfallon Quote
Hasselblad 110 2.0
Don't you mean Hasselblad 110mm f/2.2? which has a T stop of T=3.0

I have worked with the HC 110mm f/2.2. I hated it. I prefer the more modern optics of the Leica Summicron-S 100mm f/2 ASPH. Due to the short flange on the Leica S, adapting such an expensive lens to the Pentax 67 would be impossible.

Last edited by Digitalis; 02-16-2016 at 06:42 PM.
02-18-2016, 07:55 AM - 1 Like   #11
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If speed is what you want, Astro Berlin lenses show up from time to time on ebay. There is one with a P67 mount right now I believe. They come in various flavors either as 150mm f1.8 or f2 and their names are Pan-Tachar, Tachonar and others. They are not your sterile modern digital medium format lenses, but they certainly have narrow depth of field, speed, and bokeh. Just beautiful drawing from a bygone era.

Another fast lens with narrow depth of field is the 180mm f/2.8 which has been manufactured by Carl Zeiss Jena or Pentacon. They have been occasionally adapted for P67 with good success. Those are sharper than the Astro Berlin lenses and go back to the old Olympia Sonnar. Coatings are not up to modern standards, but once more, it's a fast lens with narrow depth of field. Both are quite nice for portraits. You were asking about a Zeiss, and that would be the one.

If you are willing to give up on the diaphragm and just want to shoot at or around f2 you can also adapt some of those cinema projection lenses. The shorter focal lengths don't cover, but those around 120mm or longer do. They are fairly sharp and some are well coated.

Finally, those Zoomar lenses came at varying levels of performance, but some were remarkably good.

Last edited by Lacunapratum; 02-18-2016 at 10:33 AM.
02-18-2016, 08:35 AM   #12
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QuoteOriginally posted by Digitalis Quote
Don't you mean Hasselblad 110mm f/2.2? which has a T stop of T=3.0
Dear Digitalis, i was wondering, do you have any idea of the T-stop of the 105/2.4 ? i tried to find that answer on internet, but i didn't find anything. Maybe a man of your knowledge might have the answer.
02-20-2016, 06:46 AM   #13
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QuoteOriginally posted by aurele Quote
Dear Digitalis, i was wondering, do you have any idea of the T-stop of the 105/2.4 ?
I'll have to dig through my test data, but from memory I recall the transmission from that lens is somewhere in the vicinity of T=3.5
02-20-2016, 06:53 AM   #14
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My Mamiya 645 had a 80/1.8 on it. I sold it for a song in my stupid naivety a few years ago....
02-20-2016, 06:54 AM   #15
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QuoteOriginally posted by Lacunapratum Quote
If speed is what you want, Astro Berlin lenses show up from time to time on ebay.
I remember those lenses, It has been ages since I heard the name Pan-Tachar or Tachonar. Finding them in good condition might be difficult, As I recall these lenses weren't hugely popular due to their size and weight.

I recall the Astro-Berlin Pan-Tachar 125mm f2.3 was quite good.
QuoteOriginally posted by Lacunapratum Quote
They are not your sterile modern digital medium format lenses
That is a diplomatic way of putting it, these lenses tend to be under-corrected so expect a bit of swirl to your bokeh.
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