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Pentax 6x7 Front Standard for tilt, swing, shift, rise.

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Wayne Stevenson says:

UPDATE: Seems some of you have taken an interest in my work with this. So to keep you updated in the work I am doing with it, you can check it out here:

www.flickr.com/search/?q=pentax+6x7+tilt&w=33834042%4...

Something you guys may find interesting. Just finished testing it out.

I have large shifts. Bellows is the only thing holding me back. Heh. Getting plenty of rise. My on-axis tilt is spectacular.

It is completely self-contained. I took a 4" PVC plumbing connector. Trimmed one end off and bored it out to take a small macro extension tube. Trimmed the other just long enough to attach the focus "rail". Ensuring infinity focus was a must. Heh. Most important part of the build.



I am just waiting for my first roll to dry. I'll have an example or two to share with you.

It isn't pretty. I cut everything at the very beginning based on one spec. But I got ahead of myself and built the front standard much wider than I had wanted. Gives me a ton of shift mind you.

Rather than rebuild the standard frame, or recut my lens boards, I just decided to compensate through the rest of the build.
Originally posted at 4:45PM, 2 September 2010 PDT (permalink)
Wayne Stevenson edited this topic 91 months ago.

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Denverdad says:

I saw this in the camera maker's group too, and was confused about how you could achieve infinity foucs. Then I looked at the large version of the picture and realized that it is an enlarger lens attached, not a pentax 6x7 lens. Now I get it!

Looking forward to seeing some images. :)
107 months ago (permalink)

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william.olive says:

I'd kill for camera movements sometimes ;-)

Keen to see your results.
107 months ago (permalink)

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Wayne Stevenson says:

Heh. Yes, the enlarger lens is the crucial part. Well, any lens with a large enough image circle, and a focal plane that wasn't too short, and wasn't too long.

I considered picking up a 4x5 lens and copal shutter for this for the faster flash sync. But 1/30th never really bothered me in the first place.
107 months ago (permalink)

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Wayne Stevenson says:

I'll try and get some better shots of the movements in action later this week. :D Really excited to start using this.


107 months ago (permalink)

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Rachel Rayns says:

Oh this is awesome. Go you.
107 months ago (permalink)

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Wayne Stevenson says:

Wish I had more time to devote to this contraption. Heh. On some of the extreme movements, I am getting a lot of vignetting. Which isn't a surprise, but I would like to find out exactly how much movements I can get before they happen, so I don't have any unexpected surprises.

Here are a couple more examples of the movements in use. My first actual shoot is still to be revealed. I have a roll of portraits I shot on Ektar this past fall that I haven't gotten around to developing. My fingers are crossed that they aren't all vignetted like the other two examples above. But I was using heavy movements in those shots if I recall.



105 months ago (permalink)

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bblhed says:

I had been wondering what your intention was with this setup, now I see you are using it to achieve targeted soft focus that is more controlled than a soft filter, and better sharp areas than a Lensbaby would deliver.

I thought you were going for sharp all over without stopping down.

Nice work, I see that you appear to be getting better with it the more you use it.
105 months ago (permalink)

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Wayne Stevenson says:

Heh. That's still the first test roll I shot. Never got around to uploading those other two shots. So I am still in the dark as to how much movement I can get without vignetting. I thought it should have been fairly easy to spot through the viewinder. But that was an assumption. Heh.

I will be using movements to control the depth of field for landscape as you thought. But I also love to tighten up my depth of field as well as you see.

This is mainly for doing with a portable MF roll film camera, what I can do with LF ithout the added weight of LF.
105 months ago (permalink)

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Wayne Stevenson says:

Just uploade a few more photographs I took with this beast. What a day (and choice of film) to become brain-dead with the excitemet of testing this, to forget to use my meter, and undeexpose. Heh.


102 months ago (permalink)

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Wayne Stevenson says:

Finally updated this beast. I picked up a Bronica macro bellows off KEH for a song. Came without the front lens board, and bellows. Perfect. I would like an extra half inch of extension but unless I modify my front lens board, it's going to have to suit me fine. I get focus at about 3' which is perfect for my needs. Just limits my macro ability. Not that I ever shot macro with this camera. I CAN remove the front element off the lens though and get amazing macro capability. Not sure on the sharpness at this point, but all that will be experimented with.

The front lens board for this was made out of a cheap cokin filter holder, and a 49mm cokin adapter. I filed off the threaded lip and widened the oppening a couple MM to accomodate the lens inside. I may have gotten away with a 52mm adapter, but the lip was still too wide to get the retaining ring on so it still would have had to be cut off with a jeweller's saw.

Using the Cokin adapters saved me a ton of time. I can put whatever lens on it that I want with minimal pissing around. The bellows opening is a circle hole the same diameter of the lens. I put a thin shim of steel inside cut to the dimension of the cokin adapter, placed over top and the retaining ring on top of that. It double functions as preventing the bellows from collapsing into my view, and holding the bellows on as the retaining ring wouldn't completely hold it on.

I still need to make a new bellows for it out of a black material. Getting a ton of light bouncing around in there given that it's a white material. So I'm likely going to come up with a better connecting method.

In doing so, I'll probably switch to using just the small extension tube and no PVC. That way, I can get infinity focusing on wide angle by removing the front element of the lens. Which also doubles as an excellent macro lens racked out.



I'll probably shoot a test roll today before disassembly for the new bellows.
97 months ago (permalink)

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bblhed says:

Nice piece of work.
97 months ago (permalink)

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Wayne Stevenson says:

Well, made myself a new bellows, and put 1000km on yesterday and today for testing purposes. I'm going to cry if I have any pinholes in that bellows. :) Way too hot to develop film right now, but I'll have some results in the next couple days.
97 months ago (permalink)

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Film Guy says:

This is great, and it's also crossed my mind. Hope it works out for you. Yes, be careful of the movements, especially rise or fall, as vignette will happen once your near the image circle of that lens.

I went the other way, as a good LF camera is actually not heavier than a P67 with a larger lens on it. I got a good used Wista roll film back for the 4x5, and can now shoot 120 film in 6x9 size. Great for landscape and astrophotography.
97 months ago (permalink)

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Wayne Stevenson says:

Well, things are looking great now. I have some weird lines running across the frame. I suspect my seals have deteriorated though the results aren't what I would expect (dark lines). They're on the negatives.

My meter is possibly in need of calibration. I have purchased a new Sekonic 758 for the 1 degree spot. Have yet to compare the two to confirm if my old Sekonic is calibrated properly.

However it may be due to a loss of light due to bellows extension. Which I wouldn't think possible but with the movements I am using (which are a lot more than I have ever used on my 8x10 or 4x5) I suppose I can't rule it out. Do have to experiment more with this to find out what caused them or if they're some anaomally that had to do with the roll itself (quality issue).





96 months ago (permalink)

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Wayne Stevenson says:

Seems some of you have taken an interest in my work with this. So to keep you updated in the work I am doing with it, you can check it out here:

www.flickr.com/search/?q=pentax+6x7+tilt&w=33834042%4...
91 months ago (permalink)

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dswcamera says:

Found this thread in a search. What a great idea & implementation!
If Wayne is still listening, am curious what enlarger lenses he would recommend. Thanks
52 months ago (permalink)

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Wayne Stevenson says:

Well, the ones I used were all suitable for large format enlarging. So that pretty much is a pre-requisite to ensure coverage, with a bit of movements.
52 months ago (permalink)

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