H3D39 long exposures image quality?

[BernardLanguillier]

Dear H3D users,

I would like to hear feedback from you about:

1. The image quality of the H3D39 for long exposures: 30 sec, 60 sec and 2 mins. Any 100% samples would be great,

2. The cold weather performance of the batteries. How many images can be shot at -10 C degrees? As a practical example, my Mamiya ZD only delivers 10 (ten) images or so with one battery charge instead of about 300 at 20 C.

Thank you in advance,

Regards,
Bernard

[godtfred]

1. The image quality of the H3D39 for long exposures: 30 sec, 60 sec and 2 mins. Any 100% samples would be great,
[a href=\"index.php?act=findpost&pid=163809\"][{POST_SNAPBACK}][/a]

Far as I know the H3D-39 only goes to 32 sec with a digital back, but an increase to 64 sec is in the pipeline for the next generation of firmware coming with phocus (along with a stop of higher ISO performance.)

On a LF camera, the digital back might allow for longer exposures? (I have not tried this myself, only exposures around a couple of seconds and shorter.)

-Axel

[jecxz]

<deleted>

[pprdigital]

Bernard,



Mirror slap is much quiter with the H3DII. Back and body work very well together and I like the integration. Keep in mind I'm coming from film, I don't have any experience with H3D or other backs.

Be well.
[a href=\"index.php?act=findpost&pid=163830\"][{POST_SNAPBACK}][/a]

I've noticed that the mirror seems subdued on the H3DII compared to previous generation H cameras. I believe the swap of the heat sink for the fan is at least partly to credit for this. The heat sink adds a very slight bit of additional heft to the underside of the digital magazine - where it resides - and somehow this seems to help dampen the mirror. On some H cameras, the mirror almost seems to have a pull sideways to it. On the H3DII, it feels dampened and much more straight up and down.

Steve Hendrix
www.ppratlanta.com/digital.php

[BobDavid]

I made 30 second, ISO 100, exposures outside under street lights with a CF 39MS. The temperature was in the mid 60s (central Florida). The files are clean and sumptuous.

[godtfred]

-Threadjack-

Anyone know if there is an actual construction change to the mirror on the H3DII. Or is the new firmware funcion where you can set the shutter to fire a bit after the mirror in effect at a default setting of some milliseconds?

-axel

[Silverthorne]

Battery life is a non-issue with me. After hearing all the bad news, I am pleasantly surprised.

Working outdoors in the mountains of Colorado where it has been -5 at 7:00 A.M. My body gives out long before the batteries do and I've given it 2 hours at a time with a few dozen exposures.

H3D with the preview off after 10 seconds.

[BJNY]

- Threadjack -

Can the H3DII-39 shoot continuously without pausing for a buffer to clear?
When I tested a 39MP Hasselblad back over a year ago, I had to wait after shooting 7 to 9 frames.

[jecxz]

<deleted>

[jecxz]

<deleted>

[BJNY]

Thanks Derek.
What I'd really like to know is if you can shoot 40 frames per minute, every minute.  Or, are you prevented from making an exposure before the buffer clears?  Both tethered to a Mac Pro, and shooting to Extreme IV.
Billy

BJNY - no delays shooting 9 images in a row; image appears on LCD rapidly.
[a href=\"index.php?act=findpost&pid=163918\"][{POST_SNAPBACK}][/a]

[pprdigital]

- Threadjack -

Can the H3DII-39 shoot continuously without pausing for a buffer to clear?
When I tested a 39MP Hasselblad back over a year ago, I had to wait after shooting 7 to 9 frames.
[a href=\"index.php?act=findpost&pid=163881\"][{POST_SNAPBACK}][/a]

Billy:

What I have found is that H3D cameras shoot continuously for around 30 seconds pretty continuously, then there seems to be a slightly slower continuous shooting, perhaps an extra 1/3 of a second between shots, but still continuous - there are no real buffer delays. This has been our experience shooting to Extreme IV cards, and also tethered, although tethering speed will depend some on processor, RAM, etc.

While you can shoot continuously tethered, Flexcolor is notorious for the previews backing up as they take their time appearing. I expect this to improve with the release of Phocus, which will utilize .3FR as the raw format. Currently, files are captured in .3FR format, but converted to .FFF as they come into Flexcolor, hence the delay in rendering the preview fully.

It should be noted that indeed you only got 7 to 9 shots continuous shooting about 16 months ago. Then Flexcolor was updated, and continuous shooting was enabled as well as faster shooting speeds. This was done with a FREE firmware update via Flexcolor software. The same upgrade also improved upon the high ISO quality, dramatically improving it. There was no hardware "upgrade" that had to be paid for. I believe these advances through free software upgrades do not get credited enough, and I expect these free advances to continue.

Steve Hendrix
www.ppratlanta.com/digital.php

[BJNY]

Thank you, Steve.
Does the H3DII-31 behave similarly?

[pprdigital]

Thank you, Steve.
Does the H3DII-31 behave similarly?
[a href=\"index.php?act=findpost&pid=163944\"][{POST_SNAPBACK}][/a]

Yes - but remember it shoots a quarter second faster than either the H3DII-22/39 (1.2 seconds per frame vs 1.4)

Steve Hendrix
www.ppratlanta.com/digital.php

[marc gerritsen]

Dear H3D users,

I would like to hear feedback from you about:

1. The image quality of the H3D39 for long exposures: 30 sec, 60 sec and 2 mins. Any 100% samples would be great,

2. The cold weather performance of the batteries. How many images can be shot at -10 C degrees? As a practical example, my Mamiya ZD only delivers 10 (ten) images or so with one battery charge instead of about 300 at 20 C.

Thank you in advance,

Regards,
Bernard
[a href=\"index.php?act=findpost&pid=163809\"][{POST_SNAPBACK}][/a]

Hi Bernard

I have only shot the H3D in -2 or -3 temperatures while in Korea and did not see a dramatic reduction in usage, I kept my spare battery as close to my body as possible and between the 2 batteries, I had a full day of shooting and viewing (maybe shot about 200 frames that day)

Camera definately cannot expose longer than 32 seconds either in B or T mode

When ever I do 32 sec exposures, there is a bit of noise and I would not use photos at their full size, When I reduce a H3D 39 photo to a one page size they are absolutely fine. That is the benefit of shooting 39mp.

Here are a few crops

cheers
Marc