Auto Focus With Face Detection = Very Good

Joel Corral · March 10th, 2013, 02:16 PM

It's easy. Turn off face detection buy pressing the custom button. Set iris, shutter and exposure then turn on face detection.

JC

Tom Van den Berghe · March 24th, 2017, 12:25 PM

I thought my FS100 had also face detection and spot focus but I can't find it. So the EA50 has it and the FS100 not?

Vince Pachiano · March 24th, 2017, 03:49 PM

Quote:

Originally Posted by Ron Evans

IThe problem comes when it has been focused at wide angle and then zoom in closer. It will almost certainly be out of focus then.Ron Evans

https://en.wikipedia.org/wiki/Varifocal_lens

Ron Evans · March 24th, 2017, 05:00 PM

I know what parfocal means. But one has to know both if the lens is parfocal and how to use it too. Not all lenses are parfocal and even if they are it is more difficult to focus at wide angle and expect the lens to be in focus at tele. That is why the recommended procedure is the reverse of that. Focus at tele and then frame for the field of view needed. Depth of field increases as one comes back from full tele position. A lot of modern cameras have electronic control of their parfocal performance and may not always be parfocal under all camera conditions. In other words the camera is refocusing what is really NOT a parfocal lens by itself but needs the camera to make it as such. True optically parfocal lenses tend to be really expensive.

This post is from 4 years ago do you have some reason to post ?

Tom Van den Berghe · March 24th, 2017, 10:40 PM

have to film carnival here with steadycam so I prefer The FS100 above the nex-ea50 quality wise.
About 1 month ago I filmed also a carnival with fs100 and stocklens on manual focus and peaking.

There were lots of shots not in focus. So I read about face detection about the EA50 here and thought my FS100 has it also.

I will just shoot autofocus this time because I have no face detection.

Vince Pachiano · March 25th, 2017, 07:26 AM

Quote:

Originally Posted by Ron Evans

This post is from 4 years ago do you have some reason to post ?

Don't blame me, blame Tom Van den Berghe

Ron Evans · March 25th, 2017, 08:10 AM

Quote:

Originally Posted by Vince Pachiano

Don't blame me, blame Tom Van den Berghe

Sorry. But if you had not quoted me I would not have replied.

March 10th, 2013, 02:16 PM	#16
Joel Corral Major Player Join Date: Nov 2003 Location: Brea, CA Posts: 356	Re: Auto Focus With Face Detection = Very Good It's easy. Turn off face detection buy pressing the custom button. Set iris, shutter and exposure then turn on face detection. JC

March 24th, 2017, 12:25 PM	#17
Tom Van den Berghe Major Player Join Date: Feb 2010 Location: BELGIUM Posts: 405	Re: Auto Focus With Face Detection = Very Good I thought my FS100 had also face detection and spot focus but I can't find it. So the EA50 has it and the FS100 not?

March 24th, 2017, 05:00 PM	#19
Ron Evans Inner Circle Join Date: Mar 2003 Location: Ottawa, Ontario, Canada Posts: 4,222	Re: Auto Focus With Face Detection = Very Good I know what parfocal means. But one has to know both if the lens is parfocal and how to use it too. Not all lenses are parfocal and even if they are it is more difficult to focus at wide angle and expect the lens to be in focus at tele. That is why the recommended procedure is the reverse of that. Focus at tele and then frame for the field of view needed. Depth of field increases as one comes back from full tele position. A lot of modern cameras have electronic control of their parfocal performance and may not always be parfocal under all camera conditions. In other words the camera is refocusing what is really NOT a parfocal lens by itself but needs the camera to make it as such. True optically parfocal lenses tend to be really expensive. This post is from 4 years ago do you have some reason to post ?

March 24th, 2017, 10:40 PM	#20
Tom Van den Berghe Major Player Join Date: Feb 2010 Location: BELGIUM Posts: 405	Re: Auto Focus With Face Detection = Very Good have to film carnival here with steadycam so I prefer The FS100 above the nex-ea50 quality wise. About 1 month ago I filmed also a carnival with fs100 and stocklens on manual focus and peaking. There were lots of shots not in focus. So I read about face detection about the EA50 here and thought my FS100 has it also. I will just shoot autofocus this time because I have no face detection.