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12-17-2012, 01:22 AM   #1
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-35 C Siberian Extreme portrait test K7+DA*55

It is all about cold weather in Novosibirsk, Russia.

Last weak almost every day was -35 degr Celcium.



I was tired of seating at home and on sunday performed an one hour photo test.

It was -35 in the street, and the K7 with DA* were not covered by coat or something else, they were totally exposed to be frozen.


After half of an hour Apperture on DA*55 was frozen and every shot was f1.4....but we had some fun about it)))


Now everything is working great, next time i will try other lens.


So I think the first test was half passed!


And photographs.
Danil f 1.8.
and Girls wide open, suppose)))







12-17-2012, 04:15 AM   #2
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Great experiment!
12-17-2012, 06:00 AM   #3
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That is what I call real world testing, thanks for sharing the results!

By the way, the frost on the eyelashes gives a really nice touch to the portraits
12-17-2012, 06:29 AM   #4
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#2 is fantastic!

I also agree that the frost on the eyelashes makes it quite special... not something we see every day!

Glad you could convince your models to go outside as well!

12-17-2012, 06:44 AM   #5
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That is extreme testing! I like the second one also, but they are all great shots.
12-17-2012, 07:11 AM   #6
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That is great. Can you reed the cameratemperature in de exif info? I suppose that there is some heat in the camera and that could keep it warm, but the lens does suffer from the full -35.
12-17-2012, 08:13 AM   #7
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Well done & great results!
12-17-2012, 10:05 PM   #8
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QuoteOriginally posted by jva59 Quote
Well done & great results!
I checked exif info. The lowest camera temperature was -10degr Celcium.

12-18-2012, 01:04 AM   #9
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QuoteQuote:
Apperture... was frozen
Really frozen picture!

And what about the shutter?
Worked well?

=
Prawdziwe zamrożony obrazek!

A jak tam ze spustem migawki?
Sprawowała się dobrze?
12-18-2012, 05:00 PM   #10
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Damn that's cold, trust you had vodka standing by ready for when you got inside, well for the models at least.
12-18-2012, 05:41 PM   #11
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Pentax shutters have always been good in the cold. (Below is an H1a shot from college in 1968 - out all night at nearly -30F) But with dSLRs there's the electronics and autofocus motors also. Glad to see it worked!
Name:  Winter Carnival 1968.jpg
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12-18-2012, 09:51 PM   #12
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I'm off to Finland tomorrow where in balmy Helsinki, it is only supposed to between 10 and 20 degrees Fahrenheit. Glad to know I don't really have to worry!
12-18-2012, 09:52 PM   #13
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How well did the AF work? Did it work at all?
12-19-2012, 12:57 AM   #14
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QuoteOriginally posted by JinDesu Quote
How well did the AF work? Did it work at all?
At first I swithed it to manual mode, because was afraid that SDM will suffer. But after I realised, that it does not takes a lot of effort to rotate focus ring i switched it to Auto mode. The coldest shots were made in AF and it worked well!
12-19-2012, 05:37 AM   #15
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That's very good to hear! Surprising too - I'd expect the SDM to have locked up as well.
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