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Hey Dave, great bit of insight here! I've been struggling with the best workflow for tilt and this sounds simple and quick. Question, when you are at f/5.6 and adjusting tilt until everything near and far comes into focus are you looking at focus peaking? Then do you fine tune if necessary at 100%?My standard process is to dial in one degree of tilt by default, open up the lens to f/5.6, focus midway and then adjust tilt until everything near and far comes into focus. Fine tune focus if necessary, and finally stop down to f/11. In this case, I had the camera angled down so only needed 1 to 1-1/2 degrees.
Hi Warren,Hey Dave, great bit of insight here! I've been struggling with the best workflow for tilt and this sounds simple and quick. Question, when you are at f/5.6 and adjusting tilt until everything near and far comes into focus are you looking at focus peaking? Then do you fine tune if necessary at 100%?
I believe this is the post Dave is referring to, so much great info in it!Hi Warren,
I do use focus peaking. If the whole scene is well lit so the back sees enough contrast it works fine. It would be nice if the whole scene lit up like a green Christmas Tree, but it usually doesn't. In this case, the rocks were just too dark. Usually it appears in small parts of the scene. When it appears in spots all over I know I am close. Maybe a blade of grass up front, one of the rocks and then trees in the distance. I then zoom into 100% at various places to see how everything looks. Zoomed in I will move focus a little. If the distant areas get sharper as I rotate focus farther out, I know I need more tilt. If they get sharper as I rotate focus closer in, I have too much tilt. Same with things up close but reversed. So in detail it goes like this:
Sometimes I the the helical rotation up front first, it just depends on where things are in the frame. The tricky thing with tilt is that as you dial in more tilt, the DoF wedge gets narrower. In this case, I had the whole camera tilted forward. So even though the camera was pretty close to the ground I didn't need too much tilt. The less tilt you need the easier it is. @Greg Haag started a post a while back about tilt and there is a lot of info there. Can't seem to find it right now [edit - here it is]. On an Alpa, 1 degree is about 1.5 rotations of the dial. I have a white mark on the dial so I can keep track of where it is. The adapter has degree marks, but they are hard to see in the dark.
- Open to f/5.6
- Dial in 1 degree of tilt.
- Zoom in to middle distance and focus.
- Zoom back out. If everything has peaking, then I'm done.
- If not, zoom in to a far distance and rotate the helical to a farther distance and rotate back. If things got sharper when doing that helical rotation test, add a little more tilt and try again. If things got more out of focus, use a little less tilt and try again.
- Then zoom in up front to see if everything is sharp. Usually at this point everything is really good. If not, I try again using the close focus point. For a close point, I dial focus closer and back out. If it got sharper, I add more tilt. If not, less tilt.
- I don't expect everything to be tack sharp because I'm still at f/5.6. But it should be uniform throughout the image.
- Close down to f/11 or f/12, adjust shutter speed and shoot.
Dave
This helps a lot Dave! I've had success with tilt, but haven't done it enough to figure out a systematic approach. Now I need to absorb this, read @Greg Haag thread and practice!Hi Warren,
I do use focus peaking. If the whole scene is well lit so the back sees enough contrast it works fine. It would be nice if the whole scene lit up like a green Christmas Tree, but it usually doesn't. In this case, the rocks were just too dark. Usually it appears in small parts of the scene. When it appears in spots all over I know I am close. Maybe a blade of grass up front, one of the rocks and then trees in the distance. I then zoom into 100% at various places to see how everything looks. Zoomed in I will move focus a little. If the distant areas get sharper as I rotate focus farther out, I know I need more tilt. If they get sharper as I rotate focus closer in, I have too much tilt. Same with things up close but reversed. So in detail it goes like this:
Sometimes I the the helical rotation up front first, it just depends on where things are in the frame. The tricky thing with tilt is that as you dial in more tilt, the DoF wedge gets narrower. In this case, I had the whole camera tilted forward. So even though the camera was pretty close to the ground I didn't need too much tilt. The less tilt you need the easier it is. @Greg Haag started a post a while back about tilt and there is a lot of info there. Can't seem to find it right now [edit - here it is]. On an Alpa, 1 degree is about 1.5 rotations of the dial. I have a white mark on the dial so I can keep track of where it is. The adapter has degree marks, but they are hard to see in the dark.
- Open to f/5.6
- Dial in 1 degree of tilt.
- Zoom in to middle distance and focus.
- Zoom back out. If everything has peaking, then I'm done.
- If not, zoom in to a far distance and rotate the helical to a farther distance and rotate back. If things got sharper when doing that helical rotation test, add a little more tilt and try again. If things got more out of focus, use a little less tilt and try again.
- Then zoom in up front to see if everything is sharp. Usually at this point everything is really good. If not, I try again using the close focus point. For a close point, I dial focus closer and back out. If it got sharper, I add more tilt. If not, less tilt.
- I don't expect everything to be tack sharp because I'm still at f/5.6. But it should be uniform throughout the image.
- Close down to f/11 or f/12, adjust shutter speed and shoot.
Dave
My photo assistant, Miss Abby, accompanies me on just about every outing, including even those that take place in the middle of the night:My new buddy was giving me photo tips..... Stayed with me for quite awhile.
Awesome behind the scenes George, I look forward to seeing more! My wide on the Cambo 1600 is 32 mm, it is a great lens, but if I were doing it again today I might also consider the 40 for size and weight.Due to the temptations that this forum presentsand with the great customer service from Capture Integration, I bit the bullet and purchased a CFV II 50C. I have been testing it at the house the last week and finally got a break at work and weather today and decided to take it along with my Cambo Actus on a in Navy terms "shakedown cruise". I thought I would give a behind the scenes of that effort.
I loaded up my backpack with the kitchen sink and did a 5 mile out and back hike along a local river. Goal was to just use the gear in different shooting scenarios and get the feel for the camera before going on a serious trip.
My set up for carrying is a converted Kelty Raven 2600 backpack that I was able to use the inserts from a Pelican case that I had. I added a dump pouch to the molle webbing to hold the weight of the tripod. Works out quite well and distributes the weight nicely. As you can see in the shot of the pack open, I have big room for improvement on my organization.
The tethering of the iPad was perfect and it is great having a 10" viewfinder. Definitely worth the weight penalty of carrying it in the field.
The other plus of today's trip, is I verified that my copal shutters are accurate. Now to research wide angle options for using on the Cambo. Any input on that would be appreciated. Widest lens I have now to use on the Cambo is 65mm. I could adapt a Pentax A 645 35mm I have, but not sure how much movement that will allow.
Thanks for looking,
George
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Thanks Greg!Awesome behind the scenes George, I look forward to seeing more! My wide on the Cambo 1600 is 32 mm, it is a great lens, but if I were doing it again today I might also consider the 40 for size and weight.
Congratulations on the purchase! It is a fine back and a lot of fun to use. You're off to a great start with a very nice image!Now to research wide angle options for using on the Cambo. Any input on that would be appreciated. Widest lens I have now to use on the Cambo is 65mm. I could adapt a Pentax A 645 35mm I have, but not sure how much movement that will allow.