Hi. Trying to set up trap focus to photograph birds as they come in for a landing. Have D800 set to AF-S / FOCUS, Center Single Area, and have AF-ON. (One article says use AF-S and another says use AF-C)
Set Center AF box on the area where I expect the bird. The background in that area is out of focus. I have not pushed the AF-ON button because that will bring the background in focus and the bird will be much closer than the background. As I understand it, the shutter is not supposed to release until the "bird flies into the box". I understand that I should be able to push and hold down the wireless remote button and it will not fire until the "bird comes into the box". Instead, it just keeps firing away. Clearly I am doing something wrong, just don't know what ...
To complicate matters, I am using an SB-600 set to iTT-BL.
Trap Focus is described in David Busch's D800 Guide. Doesn't seem too onerous. Change shutter release to AF-on only. Change to Focus Priority. Set AF-S and Single Area. Prefocus and reframe. Then press and hold shutter. Wait for subject.
That worked with my F6 and my D300 but it doesn't work with my D800e and D4. Both the D800e and D4 will take the picture immediately when the shutter is pressed, whether in focus or not.
For the D800 and D4 Nikon changed how AF-S works. David Busch appears not to have done his homework completely and copied from earlier books without testing. Thom Hogan has it correct in his eBook on the D800.
Gary in SE Michigan, USA. Nikonians membership - My most important photographic investment, after the camera. D4, D810, D300 (720nm IR conversion), D90, F6, FM3a (black), FM2n (chrome) YashicaMat 124, Graflex Speed Graphic 4x5 My Nikonians Gallery & Our Chapter Gallery
Hi. This one is what I am trying to do only better with more freeze on the wings. Was shot at 1/250, f11, Matrix, iTT-BL. If I go to AutoFP on the flash and set shutter to 1/1250 I miss the bird all together.
Hi. The problem is that I miss the bird completely in 95% of the shots. I was looking at Trap Focus to auto-fire when the bird in in the scene and in focus. These Steller's Jays are quick so for that to work it would have to be an instantaneous focus recognition and fire. If the shutter speed is 1/250 sec and up, I miss the bird. If the speed is lower, I get a bird blurred or part of a bird out of the main focus area. This shot above was more luck than skill. I am just looking for a way to increase my "luck". Thanks all . . .
Gary - Without the equipment I am suggesting, I don't know how well this will work. But since you are shooting at f/11, you have decent DOF. Therefore I'd consider one of the motion sensors on the market and manual focus on the spot you expect the bird to arrive. Or perhaps a remote trigger is a possibility. Obviously, the bird's not going to pose for you every time, but maybe you'll at least get a bird in some pose every time?
Sat 16-Nov-13 05:32 PM | edited Sat 16-Nov-13 08:07 PM by GaryPk
Hi. I am currently using a remote release. I put the peanuts in a log hollowed-out at the top that I have clamped to the top of my outside deck railing then sit in my recliner by the wood stove with a cup of coffee and the remote and wait.
The RangeIR sensor has a max response time of 16 mS. Is that faster than a guy with a cup of coffee in the other hand? I have nothing to compare 16 mS with.
The RangerIR device is $175 for the unit plus $45 for a Nikon cable. I could use it for other shots as well as I have a wildlife watering hole out front that serves mountain lion, deer, fox, 3 types of squirrels, rabbits, bears, and even an occasional lynx. In that case I would want to fire the flash remote outside and keep the camera inside at the window where it would be away from the flash glare.
You need to try Bill Forbes "Photo Trap model 33 infrared camera trigger". It's has a One to two Milliseconds trip time. In the Reflect mode the unit triggers faster. One to 2 Milliseconds. This is the fastest mode and the easiest to set up. The working distance is out to 42 inches. I know it works as I take pictures of Hummingbirds with it. Look at Alan Murphy new letter about it. http://us1.campaign-archive2.com/?u=8524393ed61b214fe26e7c0dc&id=a4ed014434&e=920ce865da Hope this helps.
>Hi. The problem is that I miss the bird completely in 95% of >the shots. I was looking at Trap Focus to auto-fire when the >bird in in the scene and in focus. These Steller's Jays are >quick so for that to work it would have to be an instantaneous >focus recognition and fire. If the shutter speed is 1/250 sec >and up, I miss the bird. If the speed is lower, I get a bird >blurred or part of a bird out of the main focus area. This >shot above was more luck than skill. I am just looking for a >way to increase my "luck". Thanks all . . .
to increase your luck means practice, practice and practice. 1/250s is not enough. I recommend at least 1/800s. Increase ISO up to 6400 and then practice, practice and practice
I would just set the focus to manual and pre-focus on your spot and fire the shutter in cont high mode when the bird is on his way in. Don't woory that only about 5/100 will be sharp-thats the nature of song birds in flight imaging! I'd also do this in DX mode with AA's in the grip for 6 FPS.
>There is a new firmware release out today for the D800 that >apparently adds the trap focus to the D800. Check it out in >the thread today about New Firmware.
I just update my D800e today, with the new firmware and I think it is working as you would like it, to trap focus.
I set the AF to AF-S and rear button AF activation. I then focused on a target, pointed the camera elsewhere, to defocus it. I then pressed the shutter, no go. I then kept the shutter depressed and moved the camera back to the starting position and the shutter activated once back in focus. I assume if there was nothing in focus and then something came into focus, it would activate the shutter.
I also have set up the new Firmware. In your example the shutter is triggered when you return to the original "focused spot". If this is the spot you want to capture a bird when it goes to this spot how do you ensure that the shutter does not trip when you return to the spot prior to the bird coming into the spot? I hope I have explained my question well.
>I also have set up the new Firmware. In your example the >shutter is triggered when you return to the original >"focused spot". If this is the spot you want to >capture a bird when it goes to this spot how do you ensure >that the shutter does not trip when you return to the spot >prior to the bird coming into the spot? I hope I have >explained my question well.
When I want to catch a bird in flight just before it lands on the feeder, I focus on the feeder because that's the distance I want to trip the shutter. Then I move my camera about 1-2 feet to the right (and it is ready to trip), so when a bird flies into the 'focused distance' the shutter goes off.
That happens because when I trap the focus on the feeder and set the focus distance, and then move to the right, I have only a grassy field that is too far away to be in focus....so the shutter only goes off when something comes into that 'focus area'
If a bird comes from another direction it will not work, but after you observe birds a, you realize that they frequently fly in from a common area...take a seed and fly back to another common area. So they can be quite predictable. Trap focus is used when the subject distance is predictable and pre-set in your trap by something at the same....or very close... distance.
Dan (Nikon D800,V2,Sony HX400V,Lumix ZS40) "I don't read, I just look at pictures" - Andy Warhol