Luminous Landscape Forum

Equipment & Techniques => Medium Format / Film / Digital Backs – and Large Sensor Photography => Topic started by: natas on March 05, 2011, 07:02:30 pm

Title: Yosemite Set (645D)
Post by: natas on March 05, 2011, 07:02:30 pm
I shot these last week while in Yosemite with the Pentax 645D. Weather was pretty bad 2 of the 4 days we were there so I really got only 2 good days in counting travel.

The system performed very well. At one point while shooting Bridal Veil the camera was soaked beyond anything I have ever had in the past. Wet snow was not fun. Since I was using older glass I had a plastic bad wrapped around the lens to be extra careful. I didn't post full rez shots but the large previews are still fairly big.

http://www.flickr.com/photos/14288454@N07/5498288250/in/set-72157626177517468/
Title: Re: Yosemite Set (645D)
Post by: ErikKaffehr on March 06, 2011, 05:25:05 am
Nice pictures, great work!

Best regards
Erik

I shot these last week while in Yosemite with the Pentax 645D. Weather was pretty bad 2 of the 4 days we were there so I really got only 2 good days in counting travel.

The system performed very well. At one point while shooting Bridal Veil the camera was soaked beyond anything I have ever had in the past. Wet snow was not fun. Since I was using older glass I had a plastic bad wrapped around the lens to be extra careful. I didn't post full rez shots but the large previews are still fairly big.

http://www.flickr.com/photos/14288454@N07/5498288250/in/set-72157626177517468/
Title: Re: Yosemite Set (645D)
Post by: BernardLanguillier on March 06, 2011, 07:13:14 am
Nice work indeed, glad to read that the 645D performed well in these demanding conditions!

Cheers,
Bernard
Title: Re: Yosemite Set (645D)
Post by: wolfnowl on March 06, 2011, 11:33:45 am
Some very good work indeed... Thanks for sharing them!!

Mike.
Title: Re: Yosemite Set (645D)
Post by: Dave Gurtcheff on March 06, 2011, 12:31:07 pm
Shane and I are "old friends" over on the Pentax Forum. He posts his work there often...truly wonderful work, and thanks for inspiring me.
Dave Gurtcheff
Beach Haven, NJ
www.modernpictorials.com
Title: Re: Yosemite Set (645D)
Post by: eronald on March 06, 2011, 02:28:22 pm
Beautiful work. The 645D is clearly a landscape camera.

Edmund
Title: Re: Yosemite Set (645D)
Post by: Paul2660 on March 06, 2011, 03:35:11 pm
Very nice work, especially the one from inspiration point!

Paul Caldwell
 
Title: Re: Yosemite Set (645D)
Post by: c_soars on March 07, 2011, 12:01:43 pm
I quite like the black and white ones; not out of a sense of history, but rather the weather seems to lend itself to them.

It's a powerful place, to be sure.
Title: Re: Yosemite Set (645D)
Post by: AlBowers on March 07, 2011, 12:42:43 pm
Shane,
Outstanding work. And fortuitous timing, being in the right place, with the right vision, with the right equipment. Well done!
Al Bowers
Title: Re: Yosemite Set (645D)
Post by: natas on March 07, 2011, 02:45:16 pm
Thank you everyone. The wife and I had a blast out there. We also spent 1 full day with Michael Frye (Sunday) on a personal workshop. Michael really helped me out with focusing more on my composition, I think my photos in the future will benefit greatly because of his workshop.
Title: Re: Yosemite Set (645D)
Post by: MattBeardsley on March 07, 2011, 04:59:32 pm
Beautiful shots.  I love your Silver FX conversions.  I hope you make some HUGE prints!

Matt
Title: Re: Yosemite Set (645D)
Post by: natas on March 07, 2011, 08:16:29 pm
Funny you should say that, I am making 20x32's right now. I only have a 7900 so I am limited :)
Title: Re: Yosemite Set (645D)
Post by: JohnBrew on March 07, 2011, 08:58:37 pm
Well, if anything would move you to buy a larger printer those bw shots should do it. Outstanding work. Congrats.
Title: Re: Yosemite Set (645D)
Post by: mtomalty on March 08, 2011, 01:13:28 am

Hate to be a downer but I'm pretty sure there is a fairly obvious case of 'sensor split'
visible in the first image (black and white ,dominant evergreen on left side ) of your
Flickr gallery

Mark
www.marktomalty.com
Title: Re: Yosemite Set (645D)
Post by: Christopher on March 08, 2011, 03:10:09 am
yes there is ;-)
Title: Re: Yosemite Set (645D)
Post by: Dave Gurtcheff on March 08, 2011, 01:16:42 pm
I have an even older printer, the 7600. With 24" roll paper, if I don't crop, I can make 24"x32" prints. They are amazing!
Dave
Title: Re: Yosemite Set (645D)
Post by: natas on March 08, 2011, 01:36:58 pm
Hate to be a downer but I'm pretty sure there is a fairly obvious case of 'sensor split'
visible in the first image (black and white ,dominant evergreen on left side ) of your
Flickr gallery

Not sure I follow you here....
Title: Re: Yosemite Set (645D)
Post by: mtomalty on March 09, 2011, 02:25:54 am
Shane

Sensor split is a condition/problem that occurs with sensors were the left and right halves have
a slightly different exposure.
Your lead image in the flickr gallery exhibits this flaw
It is usually masked by subject matter but continuous even mid tones such as a cloudless sky
make it more visible
Might be worth getting it looked at
Title: Re: Yosemite Set (645D)
Post by: natas on March 09, 2011, 09:21:17 am
My guess is that it is more and likely the black and white conversion or the scene itself. I will check my other pictures.

Is there any test I could run to check this?
Title: Re: Yosemite Set (645D)
Post by: mtomalty on March 09, 2011, 10:38:41 am

Shane,

No test required. Your image illustrates the split.
Black and White conversions sometimes,simply, highlight the fact.

I don't have enough experience to say whether the issue is random and will appear every now and again
or if it will always be present.

Earlier Leaf backs were very prone to this problem but were not alone.
I've seen it with various Phase and Hasselblad backs and more recently with
the Leica M8,M9 ,and the S2.

As far as I know,the remedy is a manufacturer re-calibration of the sensor

Track down Yair Shahar ( Yaya )  on this forum,now with PhaseOne, who could
very capably infirm you on this topic.

Mark
Title: Re: Yosemite Set (645D)
Post by: natas on March 09, 2011, 03:08:15 pm
Now that I think about it, I believe I may of dodged areas quickly in Lightroom before uploading. This may explain what you are seeing. I am going to check the original file when I get home to be safe :)
Title: Re: Yosemite Set (645D)
Post by: yaya on March 09, 2011, 05:16:16 pm
Shane,

No test required. Your image illustrates the split.
Black and White conversions sometimes,simply, highlight the fact.

I don't have enough experience to say whether the issue is random and will appear every now and again
or if it will always be present.

Earlier Leaf backs were very prone to this problem but were not alone.
I've seen it with various Phase and Hasselblad backs and more recently with
the Leica M8,M9 ,and the S2.

As far as I know,the remedy is a manufacturer re-calibration of the sensor

Track down Yair Shahar ( Yaya )  on this forum,now with PhaseOne, who could
very capably infirm you on this topic.

Mark

Hi Mark, I think you're mixing two different issues but it doesn't matter as the results are more or less the same

The line going down the centre of the frame in this case (SLR body, retrofocal lens) is likely a result of readout mismatch between the two sides of the Kodak sensor. Earlier Kodak sensors were using one readout only (and were slower) so usually did not show this. The newer 6µ Kodaks use multiple readouts and if the camera/ back is not calibrated properly (or if the software cannot correct it) then this effect can be seen sometimes

I believe this can be resolved by re-calibration the camera as you have suggested (not sure how Pentax handle this, though)

You've mentioned Leaf backs but in our case this was more related to using wide angle, symmetrical lenses. At the time we offered a custom calibration that was done by the user and then later (about 18 months ago) it was resolved via some clever software algorithms

BR

yair
Leaf Imaging
Title: Re: Yosemite Set (645D)
Post by: natas on March 09, 2011, 06:24:07 pm
Ahh ok now I see what you are talking about. I called Pentax and they said they can recalibrate it. I managed to find a few other photos with this but it is very very hard to see. In fact I really only notice it if I do black and white conversions and add a ton of contrast to the image.  Hopefully they will be able to see the problem with my examples and correct it.
Title: Re: Yosemite Set (645D)
Post by: kuau on March 13, 2011, 09:23:13 pm
Here is my attempt at Yosemite over Presidents weekend with my Pentax 645D
http://kuau.viewbook.com/yosemite_february_2011

Steven
Title: Re: Yosemite Set (645D)
Post by: kimballistic on March 14, 2011, 03:32:10 am
Here is my attempt at Yosemite over Presidents weekend with my Pentax 645D
http://kuau.viewbook.com/yosemite_february_2011

Steven

Attempt?  Jesus man, these are beautiful.  4th image to the last (water_falls_bw.jpg) floored me enough to look for a "buy" button.  Please tell me you print.

And look, you've dragged me from the hordes of LuLa lurkers.  Nice photos!