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Forum: Pentax Medium Format
06-08-2014, 10:07 AM
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Forum: Pentax Medium Format
01-01-2014, 11:49 PM
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Jamgolf, nice set there
Flint Michigan, taken last summer:
https://app.box.com/s/gcqe89wydtfmdwgs1x9s
Taken with the home built medium format camera using Takumar 6x7 90 mm leaf shutter. Fuji 160 home processed in Rollei Digibase C41.
Scanned on the Epson V600 at 1200.
I cropped this set of photos, holding full width of the 2x3 Graflex frame (67.7mm, 2989 pixels) and top and bottom were cropped to form 1:2 aspect ratio.
The resolution is limited by the V600 but is still rather good on the 20 inch Eizo.
Learning how to mount non standard prints from the mf C41 negs, I have purchased a Logan mat cutter. Prints are by Office Depot store pickup service.
I added big borders top and bottom and got a 14 inch wide print which seems to be of good fidelity, and cut it to 1:2 ratio.
I am also looking to try EZPrints which offers "pano" style with a range of fixed heights and flexible widths.
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Forum: Pentax Medium Format
09-13-2013, 09:46 PM
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Nuff,
I found the 80A filter peaks up the Cyan too much which causes saturated red when inverted.
So I wait for a blue sky day and point the rig in opposite direction to the sun. -Blue sky seems to be more gentle than the 80A
Setting white balance on the camera is not relevant, as I take a raw file to ufraw to make a 16 bit TIFF and on to the contrast stacker.
I found it is critical to adjust the Histograms in the camera so that there is almost no information at each end.
That is not easy to do on the 3 channels, a few test shots are needed, adjusting the exposure carefully.
When I get a good camera shot, I do a color balance of the neg in ufraw before it is inverted,
as I found that minimizes the color balance needed when it is an 8 bit positive image.
If there are any values at the ends, they will be either saturated or lost when the neg is inverted and it will be no good.
Red is the troublesome one.
It looks like your sample image above maybe had some saturated red which became cyan.
Re-photographing the neg is quite a chore and my method is only suitable for a few shots per session - it sends me nuts
Scanning is a lot easier.
But my V600 scanner is acceptable only on 6 x7, 6 x 9 negs and it is no good on 35mm.
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Forum: Pentax Medium Format
07-03-2013, 01:26 PM
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Computar 105~150mm variable focal, fixed f/16 on the Graflex using the fp shutter , Fuji 400 processed in Rollei C41 and scanned on the V600.
This lens is from 70mm format, this shot was with the Graflex RH/8 MF back which is larger than 6x7 and I left the vignette.
I like this lens and I just got a new-in-box year 1957 shutter/iris for it. I might pull this lens apart and re- use the groups on each side of the shutter as a 105 mm or 135mm fixed focal. I have ordered a metric gear for my lathe to make the threaded adaptors.
The green rainbows are where the film crinkled as it was nr. 1 frame on the roll and i am still learning how to get the spiral started.
This is the original office of General Motors in Flint Michigan.
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Forum: Pentax Medium Format
07-01-2013, 03:24 PM
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Greenfield Village Dearborn
The Tak 90mm LS lens on a home built 6X7 metal body
Fuji 400 C41 processed in the Rollei Digibase kit
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Forum: Pentax Medium Format
05-12-2013, 09:20 AM
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Forum: Pentax Medium Format
01-10-2013, 05:23 PM
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Forum: Pentax Medium Format
11-27-2012, 09:42 AM
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Remarkable shots, itsh
I was last in Odense 37 years ago with an Agfa 35mm and 28 mm lens as I recall, but the camera and its slide shots are no longer with me.
I recall going to a big disco somewhere in town centre and having one good Danish time and walking out to find daylight!
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