View Full Version : Focusing with GH2


Jeff Harper
April 24th, 2011, 09:18 AM
OK, this camera is driving me crazy. I was, at one time, able to touch f2 button, and then hit the menu button, and then I got the blow up shot on the LCD to focus with.

That is not working any longer. I can do it when I touch the screen, then hit the menu button.

Someone please tell what that feature is called, and how it is accessed in the menu, disable, etc. and if it works while in AFS and manual. I thought I used it in AFS mode, but I guess I only can use that feature in MF. Can it be assigned to an F button?

I know I need to practice with this camera more, but I cannot even turn to the manual for help, it is such garbage.

Thanks in advance.

Dan Carter
April 24th, 2011, 10:16 AM
[AF+MF] must be on in the Custom Menu.

In MF, turn focus ring or press and hold the Q-Menu button then press Set.

In AFS, lock focus with AF Lock or press and hold shutter button, turn focus ring or press and hold the Q-Menu button then press Set.

Good luck

Jeff Harper
April 24th, 2011, 01:02 PM
Thanks Dan, very helpful and invaluable.

Jeff Harper
April 24th, 2011, 08:11 PM
Dan, thanks again, didn't know you could hold shutter while in AFS and then rotate lens for Focus Assist.

For some reason, I can't access the feature by pushing Q-menu button then set button when camera is in AFS mode. Turning the dial when holding shutter halfway works, but not the first method.

In manual mode it works as it should. I might do a reset, which I've already tried, but I might need to do a complete reset, not sure how to do it, but I'm looking into that now.

Dan Carter
April 24th, 2011, 08:45 PM
For some reason, I can't access the feature by pushing Q-menu button then set button when camera is in AFS mode. Turning the dial when holding shutter halfway works, but not the first method .

Option 1) Set Custom Menu [AF/AE Lock] to either AF, AE or AF/AE. Now press and hold the AF/AE Lock button while pressing and holding the Q-Menu then Set.

Option 2) Also set Custom Menu [AF/AE Lock Hold] to On. Now a single press of the AF/AE Lock button will lock AF and/or AE (depending on your setting in Option 1) until the AF/AE Lock button is pressed again. Now press and hold the Q-Menu then Set.

This [AF/AE Lock Hold] can also eliminate ALL focus hunt issues. One press of the AF/AE Lock button will lock AF and/or AE until pressed again. If you're doing any type of pan or tilt, this feature is your friend.

Jeff Harper
April 24th, 2011, 09:06 PM
Dan will try these methods, thanks much for the detailed explanation. The AE/AF lock sounds perfect for panning!

I'm still trying to deternine best mode for shooting various wedding scenarios. Can you offer any suggestions?

It seems sometimes Shutter Priority is best with auto ISO, because I want to run my shutter speed at a constant 1/60, but then it doesn't always work best as it seems I need to close down my aperture at times more than will happen in this mode. What to do?

I have scenarios where the brides dress is overexposed, but everything else on the altar is perfect, or even a bit dark. I just read about he IDynamic feature, that might be helpful, haven't tried it yet.

Dan Carter
April 24th, 2011, 11:31 PM
Not sure I can help much with wedding shoots. My projects are almost entirely outdoors, bright sun, landscape and animals. Where you're probably rushed for shots, I just have to wait for the right light.

For what it's worth, here are some of my basic practices.

Bright sun = ND filter or polarizer.
1080/60i or 720/60p for 125+ shutter speeds and smaller aperture (shallow DOF).
Take a test photo (or half press shutter) in A or S mode to determine camera choice of S or A.
For shallow DOF, allow shutter to exceed 180 degree rule within limits.

I.Dynamic may be helpful for you, however, when set to any strength, the GH2 makes the decision to use it or not. If the I.Dynamic icon on the LCD or EVF turns yellow, the function is being used, if white, it is not. To test this, turn I.Dynamic on and point the camera at a high contrast scene, if the GH2 determines it is high contrast enough, the icon turns yellow and you'll see the result in the LCD or EVF.

I'm fairly sure your mileage will vary..

Jon Braeley
April 25th, 2011, 07:00 AM
You should expose for the highlights - not the shadows or even the midtones.

So expose for the brides dress by simply checking your histogram (which should always be on in the display anyway). You should never allow highlights to blow out, ever. If needed pull the midtones up in post.

Are you shooting video? I ask because some of your terminology is for stills ... shutter priority... what has this got to do with video? If you are shooting 24p your shutter should be constant at 1/50. If you get fluorescents causing flicker this is neutralized by moving to 1/60. Never use auto ISO - allowing the camera to change gain is unheard of - even for stills but especially in video. Same with the dynamic feature which is rubbish and should not be used. There should be no moment during shooting where the camera can decide something - this applies to focus and exposure (which involve ISO-Shutter-Apertures). There are always exceptions and in rare instances of run and gun verite style auto pilot could get you a useable shot where one may not exist ... maybe.

Use a variable ND filter if you are moving through extreme lighting conditions. The shutter speed should not be use for exposure compensation.

Wedding are in a controlled environment, so you should have full control of the camera. I shoot docs in full manual mode comfortably moving from daylight to interiors with no set ups.

Jeff Harper
April 25th, 2011, 08:42 AM
Thanks Jon. I appreciate your advice. Your advice exposing for highlights is sound.

There is clearly a lot I have to learn. I also note you are not familiar with the GH2 or with Catholic weddings, which are hour long collections of rituals during which the subjects and lighting conditions on the altar is quite different from one part of the altar to the other.

John, when you move from from indoors to outdoors, etc when making documentaries do you leave your camera running non-stop and adjust on the fly? That would be amazing If I could do that with the GH2 while running with a set ISO and white balance.

Shutter priority, etc are video modes on the GH2 as well as for photos. I shoot at 720 60p and want to keep my shutter speed to 60 or faster, I think, but maybe I'm wrong. The variety of modes to shoot in with the GH2 is many, Shutter Priority, Full Manual, Aperture Priority, etc. These modes and more are all available when shooting in "Movie Mode" setting. The only thing not adjustable on the fly is ISO and WB.

The wedding scenario is not quite as simple as you might think. I have never thought of a wedding ceremony as a controlled enviromment, but technically it could be viewed that way. But having shot hundreds of them with videocameras, even then issues arise, as the subjects change, the locations change, and the lighting condtions change constantly and often dramatically.

For example during the Devotion to Mary, the couple arises from their well lit seats on the altar, then walk to statue of Mary which is usually a very dark area, but Mary is well lit. I absolutely cannot turn the camera off at this point. And the decision to do this ritual is often last minute, not that if I knew it would help much.

As mentioned I cannot adjust ISO or white balance on the fly on the GH2, and do not wish to turn off the camera to adjust during the processional, it is unthinkable. The lighting during the processional, tecnically stays static, until the door is closed, (most of the time) but there is a significant difference when pointing at the door vs pointing at the altar, which I must do in a single continous shot as I follow the bride to the altar who is about to be given away. Rarely is it the same. Even the white balance is affected, usually varying from a mixture of outdoor and indoor light sources when aimed at door, to completely indoor lighting at the altar.

Hence auto while balance (no choice). Now I can stop at an opportune moment to adjust AFTER she has been given away, but not before. Another challenge, is the bride and groom are seated on the right hand side of an altar that is 30' or more across in width, but the readers who come later are on the left hand side of the altar at a podium in relative darkness. (I do tons of catholic weddings). then the priest is often standing under bright overhead lights, in the center. I must pan across the altar from time to time. From a dark spot, to bright spot, and vice versa.

The vows are again, under different lighting conditions, and this happens quickly. I can, and might need to stop prior to the actual vows as there is a minute where the priest is talking where I could adjust ISO, but immediately after the vows they all move again and sit back down for 20 more minutes of ritual.

Jon Braeley
April 25th, 2011, 10:42 AM
I meant that shutter priority is not used in video - in stills yes, but no professional I know would use this mode in video. I do own a GH2 and recently shot B-roll in a doc with it - not once did I ever come out of total manual operation.

The scenario you are talking about occurs all the time in documentaries .... and I do not usually have the benefit of visiting the location before I shoot - which you can by going to the church before hand and taking test exposures and color temps, etc.

While I shoot, I think of the final edit ... trying to shoot this continously is the wrong way. In the final edit, you can give the impression that the walk from the alter to Mary is continous by cutting to another angle. This requires moving the camera or using a second camera in a fixed position - in the final edit you cut away for 3 or 4 seconds to get to the new angle. This is very common and I do this throughout my docs - often using one camera and adjusting aperture on the fly while I move. This should be easier for you as you know the path the couple take - I do this not even knowing where everyone will go!
If I shot weddings I would overcome all problems with a second fixed camera running free to use for jump-cuts. Its inexpensive with GH2's and I do this all the time with mine on a lightweight Gitzo mountaineer tripod.
I white balance for the majority - daylight or tungsten or whatever and leave it - unless there is a clear demarcation like going through a door, then I switch - again usually just thumbing the dial to a higher or lower temp - not auto WB or even a preset - its not the way. I can always nudge the color temp in post - in fact, this is the easiest fix.

By the way do you have a reason for shooting everything at 720p? Do you not deliver 1080HD to the client?

Jeff Harper
April 25th, 2011, 11:29 AM
Jon I deliver SD 16:9 to my clients. I do shoot 4 cameras, alone. The rear cameras cannot be depending upon for many critical shots. I am usually in front of the altar. I cannot get closeups with my lenses from the rear that can be depended upon. I need to be able to catch a shot of the brides's face and then the couples hands.

I may have to turn the primary camera off on occasion as you suggest, but during the processional and vows that is not an option. Those are the moments I need closeups, and I cannot turn the camera off.

I will probably have to plan to turn the camera off and change settings when she's being handed off, but the settings at that point will have to be changed 5 minutes later again.

While in theory turning off the camera and changing ISO sounds good, in practice I would need to do it so often, hell, I can't even imagine. What do I do when the congregation is standing and there is no balcony to shoot from? All I have then is the backs of heads if no front shot. It's going to be a long year.

Brian Luce
April 25th, 2011, 01:36 PM
Never use auto ISO - allowing the camera to change gain is unheard of - even for stills but especially in video. .

I never say never. I've found a good time to use auto ISO is when you pan from an interior space to an open window. The iso will give a much smoother graceful adjustment of exposure than any method I've tried.

Kevin McRoberts
April 25th, 2011, 02:12 PM
You should expose for the highlights - not the shadows or even the midtones.

So expose for the brides dress by simply checking your histogram (which should always be on in the display anyway). You should never allow highlights to blow out, ever. If needed pull the midtones up in post.
Subjectively disagreeing with you here.

Most of the time, probably... but "ever?" Some of the best shots I've seen or taken have a few purposefully blown highlights, silhouetting, lens flares, and other light play. And maybe I'm doing it wrong, but most times I try to lift brightness in midtones, it turns muddy, noisy, and ugly - fast.

I try to expose for the subject, and yes, in that, attempt to avoid blown highlights... but then that's just my take.

Jeff Harper
April 25th, 2011, 02:32 PM
Yes, Kevin, I agree. Jon's advice is fine sometimes, but not all the time. For example at weddings it is common for the area behind the altar to be brighter than where my subjects are located. If my settings were to be based on avoiding overblown highlights there, the bride and groom would be too dark.

I would also submit many professional wedding videographers often use auto settings, including ISO, auto focus and more. I would bet money the majority do, though with DSLR type cameras this percentage would be less.

There are a few very vocal folks who pretty much say that anyone that uses manual focus is a hack, which is hilarious.

When panning across an unevenly lit area numerous times, I cannot shut my primary camera down every time I need to adjust ISO and exposure.

On the other hand, Jon is correct, my bride's dress should not have been overexposed, but I had left the camera unattended, and the lighting had been adjusted while I was attending another camera, so I got screwed. By the time I returned to my camera, it had been running overexposed for 5 minutes or so, if not longer. If I had been in auto ISO I would think the issue would have at the least been lessened.

Dan Carter
April 25th, 2011, 02:33 PM
Jeff,

Have you experimented with turning [Rec Highlight] On in the Montion Picture menu? When recording in Motion Picture mode this provides live, blinking blown highlights, much like Zebras of camcorders you may have used.

Dan Carter
AG-HMC40, HDC-TM700, DMC-GH2, Canon EOS 7D
Dan Carter on Vimeo (http://www.vimeo.com/user582748)

Jeff Harper
April 25th, 2011, 02:36 PM
Dan, I just activated it yesterday, and I do believe I will leave it on. Seems VERY useful, almost essential, thank you.

Jon Braeley
April 25th, 2011, 03:33 PM
Good photography applies no matter if it is a wedding or a documentary. I have shot three full length docs set in monasteries and temples that included major ceremonies.

You expose for the highlight and there is no circumstance when you let this simply blow out ... and please, I am not talking about a special effect here. Move closer to crop out the light. Broadcasters like the BBC will not accept footage containing blown out highlights.

If you are a one man band, the critical shots are best taken with a shoulder rig or steadycam and secondary shots from well placed tripods or use suction cups on a surface. A monopod can work also. This allows you to get close-ups and different angles knowing you have other footage to use for the 3 or 4 second jump cuts to keep the final edited scene flowing. This is standard film school stuff - I think this was covered in my second week.

I am not sure why you keep saying "I cannot shut my primary camera down every time I need to adjust ISO and exposure" .... why would you do that? I move and change exposure, ISO and color temp in a few seconds while I am moving to another view without shutting down the camera. I change all the critical settings continously regardless of wether they need to change a few seconds later or five minutes later.

Brian Luce
April 25th, 2011, 04:59 PM
Have you experimented with turning [Rec Highlight] On in the Montion Picture menu?


I leave mine on all the time. I pay extra attention to skin, no flashy flashy on the skin.
If anyone is wondering, Flashing areas on Rec Highlight mean 100IRE, meaning you're blown out.

GH2 has the REC Highlight feature, histogram, light meter and along with your naked eye, that's 4 ways to measure exposure. Not bad for a $600 camera.

Jeff Harper
April 25th, 2011, 06:22 PM
Jon, I've shot three Catholic wedding ceremonies in a week, 7 or 8 in a month on a good month, 30-50 a year for a few years now.

I keep saying I can't shut down because I need to often need change my ISO settings, or run it in auto. You insist auto is not kosher.

When a reader is 40 feet away in the shadows on the extreme opposite side of the altar, and my 2.8 lens is not cutting it, I need more gain, and if I'm in manual ISO, I'm screwed unless I stop recording and restart.

When the subject becomes the priest who walks while he give the homily from the altar to halfway up the aisle, and back and continually moves, I cannot adjust ISO on the fly.

During a wedding ceremony I cannot pick up and move from one side of the altar to the other to get closer to the subject. It is never permissable to cross the aisle in a Catholic wedding ceremony. Moving equipment during a wedding ceremony is generally verboten. I did it January 1, 2011, knowing it was wrong. What happened? The priest stopped the ceremony and indicated he would not continue if I insisted on moving around. The family of the bride was extremely upset. It was so dark my FX1 couldn't get a decent shot of the priest's homily, so I moved.

Your point about film school is well taken. Whenever I've hired graduates from film schools, they cannot follow directions, and their footage is often unusable, because they are doing what they were taught, which doesn't always work at weddings.

This discussion has been most helpful. It is obvious auto iso is necessary and there really are not any other options short of buying a videocamera that permits these changes on the fly such as I used to use.

Thanks for helping me see this!

Jon Braeley
April 26th, 2011, 06:50 AM
My point in film schools was directed to editing techniques not shooting. I never learned a thing about shooting at a film school.

A recent film I shot was to cover New Year (Losar) - set in a Tibetan monastery - the ceremonies lasted eight hours during extremely diverse low light conditions. I was allowed to use one camera with an assistant. There is nothing too different about a wedding. It's all photography.
Obviously we have totally different shooting styles. I come from large format cameras - 20 years using Mamiya and Hasselblads with no auto features. So switching to video 15 yrs ago, I kept to this by not allowing the camera to choose the exposure for me.

Jeff Harper
April 26th, 2011, 07:10 AM
Jon, I have lots of compatriots locally and we all pretty much share the same issues with weddings.

We shoot continously, ideally never turning off the cameras. It just isn't done, we edit and cut out the fat, but my style involves presenting a bride with a complete ceremony with all angles covered, with emphasis on closeups from the primary camera.

The shooting style is derived from the needs of the finished product, an uninterrupted and complete record of the ceremony. Highlight clips, etc. are another matter.

Short form edits, popular now, and commanding prices double or triple what I charge, are shot completely differently than what I do. The finished product from 12 hours of shooting is often no more than twenty minutes, or 30. If that was what I was doing, my issues would be almost nil. I'd only have to shoot the highlights, and I'd be good.

Nigel Barker
April 26th, 2011, 08:52 AM
You expose for the highlight and there is no circumstance when you let this simply blow out ... and please, I am not talking about a special effect here. Move closer to crop out the light. Broadcasters like the BBC will not accept footage containing blown out highlights.This is a counsel of perfection but most of us aren't filming for the BBC. In any case how do you stop windows blowing when you have dark interiors? If I were filming for the BBC then I would perhaps have enough time & money to put scrim or ND filter on those windows or add enough light to the interiors but otherwise I just have to let them blow.
I am not sure why you keep saying "I cannot shut my primary camera down every time I need to adjust ISO and exposure" .... why would you do that? I move and change exposure, ISO and color temp in a few seconds while I am moving to another view without shutting down the camera. I change all the critical settings continously regardless of wether they need to change a few seconds later or five minutes later.With the camera in question (Panasonic GH2) you cannot change ISO (gain) or White Balance while shooting.

Jim Snow
April 26th, 2011, 11:59 AM
You expose for the highlight and there is no circumstance when you let this simply blow out ... and please, I am not talking about a special effect here. Move closer to crop out the light. Broadcasters like the BBC will not accept footage containing blown out highlights

I work for brides, not the BBC. If I'm shooting wedding ceremonies and the bride is standing in the shade under a pagoda for example, I will set the exposure on her face even if elements of the background get blow out. One of the most common examples is blue sky after just after sunset. If you shoot subjects, for example brides and grooms, in this light with the sky in the background, the sky will be blown out. It will be white, not blue. "BBC says", has no relevance to me. Here is a conversation I never want to have.

Bride, upon seeing her wedding video - "Why am I so dark!?"

Answer - "The BBC says to never blow out the hightlights.

No thank you! - - And a word to BBC - You're fired!

Jim Forrest
April 26th, 2011, 10:34 PM
+1. I just expose for skin tones not widows.