Macro's and colour separation? at DVinfo.net

Leo Mandy · March 6th, 2005, 06:55 PM

I am using a Tiffen Macro 7+ 10+ and still getting colour separation when focused on lights/lamps - is this an SLR problem or a Macro problem or something else? Thanks

Dan Diaconu · March 6th, 2005, 10:07 PM

would you describe the color sep?

Valeriu Campan · March 6th, 2005, 11:06 PM

It could be chromatic aberation. It would be good to use a lens designed for video 3CCD/prism combo

Aaron Shaw · March 7th, 2005, 12:22 AM

that shouldn't matter when using a 35mm adapter.

There could be two sources of this aberration:

1) The 35mm lens itself
2) The macro lens

You'll have to experiment to determine which it is. One way would be to shoot the same scene with different 35mm lenses and see what happens with regard to color.

Valeriu Campan · March 7th, 2005, 12:46 AM

The CA should come from the macro that is designed to work with film cameras. The prism/3CCD combo requires a different lens.

Aaron Shaw · March 7th, 2005, 12:49 AM

Ah! Ok I see your point now. It's certainly a viable claim.

Valeriu Campan · March 7th, 2005, 01:26 AM

Look here at a side by side test done with a Fujinon broadcast (video) lens and a Zeiss lens (not a "cheapandnasty").
This is with a hacked Sony FX1 HDV camera, so the CA is more prominent because the higher resolution.
With a SD camera setup, the CA could be less visible:
http://www.eidomedia.com/hdve/ziess_fuji.htm

Leo Mandy · March 7th, 2005, 07:52 AM

What I mean by colour separation is that when I point the camera at a lamp, for example, on certain angles and mostly long shots, the light from the lamp seems to glob and turn a different colour from the other parts. In other words, it doesn't look natural.

Frank Ladner · March 7th, 2005, 08:06 AM

Quote:

What I mean by colour separation is that when I point the camera at a lamp, for example, on certain angles and mostly long shots, the light from the lamp seems to glob and turn a different colour from the other parts. In other words, it doesn't look natural.

Oh ok...so it's not the typical red color near the edges of the picture(chromatic abberation), as some are getting?

I'm still not sure what's happening though...

What type of lamp is this? I've pointed the camera at a flourescent before and it turned green, along with changing the color of the rest of the scene.

Does the image look fine in the viewfinder but not in the footage? It may be a blowout/compression problem.

Just some ideas.

Leo Mandy · March 7th, 2005, 08:08 AM

The footage I have shown does not have the separation (maybe there is some confusion there). I will have to get some footage with it and I think it will be abundantly obvious.

Leo Mandy · March 8th, 2005, 05:01 PM

I am also noticing some blurring on Trees for example, I am not sure if it is my Macro 10+ or something else. The GG looks really good without the camera in front, but when I take the footage, a tree for example, will look great on the trunk, but the branches will seem to soften and blur. Not sure why...any ideas?

Dan Diaconu · March 8th, 2005, 05:21 PM

is the macro, Uncoated lens. Try a 1.6X teleconverter instead (from a photo store) and see if it makes a diff.

Leo Mandy · March 8th, 2005, 05:35 PM

I am not sure if it is uncoated or not - but I am starting to believe that the hotspot is what is causing the problems - causing the blurriness as it spreads from the center of the lens. I will look into the Teleconverter and see if it will work with my camera - the macro is Tiffen, I am not sure if that is a good company or not.

Also, I have a TV Tele Conversion Lens 1.5X, but it seems way too small to work. Actually, I am not really sure what it does?!

Dan Diaconu · March 8th, 2005, 06:04 PM

Look trough the +10. As you get it further away from the table /hand, you should see the same as in video.
Tiffen is a good company but optics have their own rules.
Any converter (IF it is a converter) should give you a "clue" even if the size is not suitable for your front mount camcorder.

Leo Mandy · March 8th, 2005, 06:12 PM

Ok, what I meant to say is the converter lens is really really small! The lens is about 1/2 inch across in this big housing. Not sure why though it would be sooo small.
I have to hand it to you Dan, your device kicks butt compared to mine. I don't see vinetting on your, I don't see the striations or the wobbling and I don't see the hotspots. Nice clear and wonderful looking. Good job.
As for me, I am still trying to get rid of the little problems along the way that you have already solved. As soon as I get rid of the hotspot, I can start working on the working version to actually shot something.

March 6th, 2005, 06:55 PM	#1
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Macro's and colour separation? I am using a Tiffen Macro 7+ 10+ and still getting colour separation when focused on lights/lamps - is this an SLR problem or a Macro problem or something else? Thanks

March 6th, 2005, 10:07 PM	#2
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	would you describe the color sep?

March 6th, 2005, 11:06 PM	#3
Valeriu Campan Major Player Join Date: Mar 2004 Location: Melbourne, Australia Posts: 223	It could be chromatic aberation. It would be good to use a lens designed for video 3CCD/prism combo

March 7th, 2005, 12:22 AM	#4
Aaron Shaw Major Player Join Date: Jul 2004 Posts: 587	that shouldn't matter when using a 35mm adapter. There could be two sources of this aberration: 1) The 35mm lens itself 2) The macro lens You'll have to experiment to determine which it is. One way would be to shoot the same scene with different 35mm lenses and see what happens with regard to color.

March 7th, 2005, 12:46 AM	#5
Valeriu Campan Major Player Join Date: Mar 2004 Location: Melbourne, Australia Posts: 223	The CA should come from the macro that is designed to work with film cameras. The prism/3CCD combo requires a different lens.

March 7th, 2005, 12:49 AM	#6
Aaron Shaw Major Player Join Date: Jul 2004 Posts: 587	Ah! Ok I see your point now. It's certainly a viable claim.

March 7th, 2005, 01:26 AM	#7
Valeriu Campan Major Player Join Date: Mar 2004 Location: Melbourne, Australia Posts: 223	Look here at a side by side test done with a Fujinon broadcast (video) lens and a Zeiss lens (not a "cheapandnasty"). This is with a hacked Sony FX1 HDV camera, so the CA is more prominent because the higher resolution. With a SD camera setup, the CA could be less visible: http://www.eidomedia.com/hdve/ziess_fuji.htm

March 7th, 2005, 07:52 AM	#8
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	What I mean by colour separation is that when I point the camera at a lamp, for example, on certain angles and mostly long shots, the light from the lamp seems to glob and turn a different colour from the other parts. In other words, it doesn't look natural.

March 7th, 2005, 08:08 AM	#10
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	The footage I have shown does not have the separation (maybe there is some confusion there). I will have to get some footage with it and I think it will be abundantly obvious.

March 8th, 2005, 05:01 PM	#11
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	I am also noticing some blurring on Trees for example, I am not sure if it is my Macro 10+ or something else. The GG looks really good without the camera in front, but when I take the footage, a tree for example, will look great on the trunk, but the branches will seem to soften and blur. Not sure why...any ideas?

March 8th, 2005, 05:21 PM	#12
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	is the macro, Uncoated lens. Try a 1.6X teleconverter instead (from a photo store) and see if it makes a diff.

March 8th, 2005, 05:35 PM	#13
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	I am not sure if it is uncoated or not - but I am starting to believe that the hotspot is what is causing the problems - causing the blurriness as it spreads from the center of the lens. I will look into the Teleconverter and see if it will work with my camera - the macro is Tiffen, I am not sure if that is a good company or not. Also, I have a TV Tele Conversion Lens 1.5X, but it seems way too small to work. Actually, I am not really sure what it does?!

March 8th, 2005, 06:04 PM	#14
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	Look trough the +10. As you get it further away from the table /hand, you should see the same as in video. Tiffen is a good company but optics have their own rules. Any converter (IF it is a converter) should give you a "clue" even if the size is not suitable for your front mount camcorder.

March 8th, 2005, 06:12 PM	#15
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Ok, what I meant to say is the converter lens is really really small! The lens is about 1/2 inch across in this big housing. Not sure why though it would be sooo small. I have to hand it to you Dan, your device kicks butt compared to mine. I don't see vinetting on your, I don't see the striations or the wobbling and I don't see the hotspots. Nice clear and wonderful looking. Good job. As for me, I am still trying to get rid of the little problems along the way that you have already solved. As soon as I get rid of the hotspot, I can start working on the working version to actually shot something.