Please Help :)

mteow · 10th July 2007

Hi, I am new to IR photography and recently bought a Hoya R72 filter. After a few shots I found a problem with my photos. There is a "bright spot" at the middle of the photo, as shown in below

Info: D80, Nikkor 50mm 1.8D, R72, M Mode, f4, shot at 5.45pm

I had read the forum suggestions to use bigger aperture to prevent getting "diffraction" on my photo but still I got it

Any suggestion to me?

Thanks

Matthew.

Montmelo · 11th July 2007

Its actually quite successful on the D80. Did you cover the view finder?

Actually, the Nikkor 50mm f1.8 is not a good lens for IR. There could be a tendency to give odd colors at the edges and possibly a hot spots.

Do try with another lens (eg. kit lens)

night86mare · 11th July 2007

Oh dear, if at F/4 your hot spot isn't solving, switch to another lens which is IR friendly.

F/4 is pretty open already.. =)

mteow · 13th July 2007

Thank you

I will try again to see will the problem be improved with f2.8 and ISO400. Too sad to know that 50mm is not a suitable lens for IR

Anyway will test on other lens to find out better shots. TQ.

10th July 2007	#1
mteow New Member Join Date: Jul 2007 Posts: 9	Please Help :) Hi, I am new to IR photography and recently bought a Hoya R72 filter. After a few shots I found a problem with my photos. There is a "bright spot" at the middle of the photo, as shown in below Info: D80, Nikkor 50mm 1.8D, R72, M Mode, f4, shot at 5.45pm I had read the forum suggestions to use bigger aperture to prevent getting "diffraction" on my photo but still I got it Any suggestion to me? Thanks Matthew. Last edited by mteow; 10th July 2007 at 08:30 PM.

11th July 2007	#2
Montmelo Member Join Date: Sep 2006 Posts: 410	Re: Please Help :) Its actually quite successful on the D80. Did you cover the view finder? Actually, the Nikkor 50mm f1.8 is not a good lens for IR. There could be a tendency to give odd colors at the edges and possibly a hot spots. Do try with another lens (eg. kit lens)

11th July 2007	#3
night86mare Senior Member Join Date: Aug 2006 Location: in your mind Posts: 19,357	Re: Please Help :) Oh dear, if at F/4 your hot spot isn't solving, switch to another lens which is IR friendly. F/4 is pretty open already.. =) __________________ Gallery \| Dreamscapes 09 Pentaxian 伪君子之所以更可憎

13th July 2007	#4
mteow New Member Join Date: Jul 2007 Posts: 9	Re: Please Help :) Thank you I will try again to see will the problem be improved with f2.8 and ISO400. Too sad to know that 50mm is not a suitable lens for IR Anyway will test on other lens to find out better shots. TQ.