Steve'sDigicams

vidiac · Dec 12, 2006, 1:57 AM

Hard to take a sharp picture....

calr · Dec 12, 2006, 4:20 PM

Apparently the LED was lit when you photographed it. Some of those LED's can be very bright. I think that is the case here. If you would share your EXIF information and tell us your camera setup, I think we can help you.

Cal

vidiac · Dec 12, 2006, 9:46 PM

Cal,

you are right - LED was alight but as you see not aligned (with the lens...).

Exif information: T=1/500, F= 29 (still not small enough ...), ISO=100, focal lenght=238mm +extension tubes, manual focus, manual mode.

calr · Dec 12, 2006, 9:55 PM

I don't know if this will help or not but you might try -1.0 ev exposure compensation if you are using auto-exposure. If you are using manual exposure, you can try increasing shutter speed to 1/1000 if available. The idea is to cut down on the light coming from the LED. If you have a polarizing or neutral density filter or any dark colored piece of glass, you could try those.

I think the brightness is preventing or hiding the proper focus in the blown highlights. f-29 should give more than enough depth of field.

Cal

vidiac · Dec 12, 2006, 11:25 PM

OK, I will try!

Dec 12, 2006, 1:57 AM	#1
vidiac Senior Member Join Date: Jan 2006 Posts: 146	Hard to take a sharp picture.... Attached Images

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Dec 12, 2006, 4:20 PM	#2
calr Moderator Join Date: Sep 2003 Location: Beaverton, OR Posts: 8,466	Apparently the LED was lit when you photographed it. Some of those LED's can be very bright. I think that is the case here. If you would share your EXIF information and tell us your camera setup, I think we can help you. Cal

Dec 12, 2006, 9:46 PM	#3
vidiac Senior Member Join Date: Jan 2006 Posts: 146	Cal, you are right - LED was alight but as you see not aligned (with the lens...). Exif information: T=1/500, F= 29 (still not small enough ...), ISO=100, focal lenght=238mm +extension tubes, manual focus, manual mode.

Dec 12, 2006, 9:55 PM	#4
calr Moderator Join Date: Sep 2003 Location: Beaverton, OR Posts: 8,466	I don't know if this will help or not but you might try -1.0 ev exposure compensation if you are using auto-exposure. If you are using manual exposure, you can try increasing shutter speed to 1/1000 if available. The idea is to cut down on the light coming from the LED. If you have a polarizing or neutral density filter or any dark colored piece of glass, you could try those. I think the brightness is preventing or hiding the proper focus in the blown highlights. f-29 should give more than enough depth of field. Cal

Dec 12, 2006, 11:25 PM	#5
vidiac Senior Member Join Date: Jan 2006 Posts: 146	OK, I will try!