Luminous Landscape Forum

Equipment & Techniques => Medium Format / Film / Digital Backs – and Large Sensor Photography => Topic started by: nicksouth on November 13, 2010, 03:34:14 pm

Title: Phase One long exposure
Post by: nicksouth on November 13, 2010, 03:34:14 pm: Hi all, do all the P1 plus backs require a dark slide of equivlnt length to exposure? Any other long exposure MFDB long exposure options? Cheers Nick.
Title: Re: Phase One long exposure
Post by: Doug Peterson on November 13, 2010, 08:24:59 pm: Quote from: nicksouth on November 13, 2010, 03:34:14 pm
Hi all, do all the P1 plus backs require a dark slide of equivlnt length to exposure?

Yes

Quote from: nicksouth on November 13, 2010, 03:34:14 pm
Any other long exposure MFDB long exposure options? Cheers Nick.

If you're going past "a few minutes" than a Phase One P+ back* is the only game in town.

*Excluding the P40+ and P65+ which are Dalsa sensors and do not do long exposures past a minute-ish

Doug Peterson (e-mail Me) ("[email protected]")
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Title: Re: Phase One long exposure
Post by: yossarians22 on November 13, 2010, 11:27:46 pm: What about the P40/65 that only go to 1 minute and the AptusII backs that only go to 32 seconds. Do these "long" exposures REQUIRE dark frame subtraction too?
Title: Re: Phase One long exposure
Post by: yaya on November 14, 2010, 02:33:47 am: Quote from: yossarians22 on November 13, 2010, 11:27:46 pm
What about the P40/65 that only go to 1 minute and the AptusII backs that only go to 32 seconds. Do these "long" exposures REQUIRE dark frame subtraction too?

Yes
Title: Re: Phase One long exposure
Post by: nicksouth on November 15, 2010, 12:07:28 am: HI,

Thanks for your help.

Now if the H4D-40 sensor was "full frame" and the tilt and shift adapter was closer to $1000 rather than $6000....!

Cheers
Nick.
Title: Re: Phase One long exposure
Post by: ondebanks on November 15, 2010, 10:15:16 am: While I am aware of the limits quoted for different backs, it's never been clear where these limits are actually being imposed. In the Back firmware? Or Body firmware?

Or are these limits just the longest exposure times that can be made by the Body, without going to Bulb mode? And is there (how could there be?) any limit to Bulb? Again...Back firmware? Or Body firmware?

???
Title: Re: Phase One long exposure
Post by: DavorHorvatic on November 15, 2010, 11:01:25 am: Quote from: ondebanks on November 15, 2010, 10:15:16 am
While I am aware of the limits quoted for different backs, it's never been clear where these limits are actually being imposed. In the Back firmware? Or Body firmware?

Or are these limits just the longest exposure times that can be made by the Body, without going to Bulb mode? And is there (how could there be?) any limit to Bulb? Again...Back firmware? Or Body firmware?

???
^

it has to do with the back and sensor technology, in your words = back firmware....