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Dimage 7 and Infrared

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bnewman said:
I have a Hoya R72 coming my way and will try it with the D7 when
the D7 arrives. Are there any specific guidelines or settings you
would suggest?

Thanks in advance.
Click to expand...
You will be able to take some nice IR shots with that. You don't really need any pointers, but here are a couple of thoughts.
  • You will need a tripod, the exposures in sunlight will be too long to hand hold about 1/8 to 1 second.
  • If you got a 49mm filter, there might be vignetting so you might not be able to use less than 50mm focal length.
  • The scene is bright enough with the light amplification in the D7 EVF that you can see just fine through the filter.
  • Just put the camera in P mode and shoot away! Autofocus seems to work fine in IR.
Bryan
 
Bryan,

I have heard that you get better results using the "Sunset" option with IR filters, any comment?

Phil
Bryan Biggers said:
bnewman said:
I have a Hoya R72 coming my way and will try it with the D7 when
the D7 arrives. Are there any specific guidelines or settings you
would suggest?

Thanks in advance.
Click to expand...
You will be able to take some nice IR shots with that. You don't
really need any pointers, but here are a couple of thoughts.
  • You will need a tripod, the exposures in sunlight will be too
long to hand hold about 1/8 to 1 second.
  • If you got a 49mm filter, there might be vignetting so you might
not be able to use less than 50mm focal length.
  • The scene is bright enough with the light amplification in the D7
EVF that you can see just fine through the filter.
  • Just put the camera in P mode and shoot away! Autofocus seems to
work fine in IR.
Bryan
Click to expand...
 
PhilM said:
Bryan,

I have heard that you get better results using the "Sunset" option
with IR filters, any comment?

Phil
Click to expand...
Sounds interesting! I've never heard that, but I'll try it out and see what happens. I don't really know what the "sunset" setting does anyway; I thought that it did something to the white balance so that it would not try to balance out the Red sunsets, but I don't really know. Bryan
 
Bryan,

I tried it without IR on acouple sunsets and found out that it 'overdid' by about times two. IMHO. Very subjective anyway. Thanks

Phil M
Bryan Biggers said:
Sounds interesting! I've never heard that, but I'll try it out and
see what happens. I don't really know what the "sunset" setting
does anyway; I thought that it did something to the white balance
so that it would not try to balance out the Red sunsets, but I
don't really know. Bryan
Click to expand...
 
I took this shot this afternoon. I use A mode setting the aperture to the smallest I can get when I do timelapsed shots of water.

In this case, F9.5 at 4.0 seconds at 21mm (83mm @ 35mm equiv), AF, Centerweighted metering ....Hoya R72 filter and Hoya ND4 filters (it was a very sunny afternoon), Velbon tripod, and the Minolta RC1000S remote cable.

http://community.webshots.com/photo/12270136/29646437zOWFCtKlHl

--Mark PernalAustin, TX
 
Someone got hold of an Minolta internal Dimage 7 manual for Techies and from that it appears that all it does is turn off the internal UR filter, which is why you get some funny results in sunset sometimes.

Does this sound right? I'm doing this from memory, and I'm not really into IR myself, but it rang a bell.

Regards

Andy
PhilM said:
I tried it without IR on acouple sunsets and found out that it
'overdid' by about times two. IMHO. Very subjective anyway.
Thanks

Phil M
Bryan Biggers said:
Sounds interesting! I've never heard that, but I'll try it out and
see what happens. I don't really know what the "sunset" setting
does anyway; I thought that it did something to the white balance
so that it would not try to balance out the Red sunsets, but I
don't really know. Bryan
Click to expand...
Click to expand...
 
Andy said:
Someone got hold of an Minolta internal Dimage 7 manual for Techies
and from that it appears that all it does is turn off the internal
UR filter, which is why you get some funny results in sunset
sometimes.

Does this sound right? I'm doing this from memory, and I'm not
really into IR myself, but it rang a bell.

Regards

Andy
Click to expand...
Well, wouldn't that be cool. OK, let me test that theory quick...

No, it does not seem any more sensitive to IR in sunset mode. That would have been really neat though. Bryan
 
I wonder how much the internal IR filtering really filters. I have a shot of a hibiscus that shows pretty good "veining"...and that usually occurs when shotting in the near infrared rainge (and in this case I wasn't). Need to get my hands on a hot filter and redo the shot some day to see if there's any difference.
--Mark PernalAustin, TX
 
Bryan Biggers said:
Andy said:
Someone got hold of an Minolta internal Dimage 7 manual for Techies
and from that it appears that all it does is turn off the internal
UR filter, which is why you get some funny results in sunset
sometimes.

Does this sound right? I'm doing this from memory, and I'm not
really into IR myself, but it rang a bell.

Regards

Andy
Click to expand...
Well, wouldn't that be cool. OK, let me test that theory quick...
No, it does not seem any more sensitive to IR in sunset mode. That
would have been really neat though. Bryan
Click to expand...
Bryan,

Here is the text from the message concerned.

"Hi Andy,

here is the easy answer:

When you shoot with the sunset-program the infrared filter is switched off. So the picture will show much more of the dark red and infrared light. This gives your picture a great impression of a wonderful and colorful sunset but it also changes the real colors to something undefined."

This guy claims to have something called the Minolta Technical Reference Book and is quoting from this. I have no idea if it's true but cannot imagine him deliberately trying to mislead us. However, if your testing shows no real difference then he may well be, or maybe he has misread his document?

Regards

Andy
 
BTW, other than using DIVU to change the size of the photo, these are 'untouched' photos right out of the camera with the EXIF info intact. The photos were taken in 'color' with the intention of creating grey-scale with a touch of color.

You'll notice that more than a few of the infrared photos are a smudge blurry - between my hand shaking, the wind shaking the berries and leaves and the longer required exposure times (approx 1/6th sec), next time I'll use a tripod to eliminate some of these factors.

Enjoy,
Shelley
TerraUnbound said:


http://www.pbase.com/terraunbound/infrared

Enjoy,
Shelley
joann said:
Any info on infrared and D7 anyone?
--
jo
Click to expand...
--
--newbie--
Click to expand...
----newbie--
 
Bryan Biggers said:
bnewman said:
I have a Hoya R72 coming my way and will try it with the D7 when
the D7 arrives. Are there any specific guidelines or settings you
would suggest?

Thanks in advance.
Click to expand...
You will be able to take some nice IR shots with that. You don't
really need any pointers, but here are a couple of thoughts.
  • You will need a tripod, the exposures in sunlight will be too
long to hand hold about 1/8 to 1 second.
  • If you got a 49mm filter, there might be vignetting so you might
not be able to use less than 50mm focal length.
  • The scene is bright enough with the light amplification in the D7
EVF that you can see just fine through the filter.
  • Just put the camera in P mode and shoot away! Autofocus seems to
work fine in IR.
Bryan
Click to expand...
Thanks for the advice. D7 is due to arrive tomorrow but probably won't have a chance to try out the IR until this weekend. Will be interesting to see what the D7 IR pictures look like with different settings. The Hoya worked really great with my Oly 2020 and so-so with the E100RS. It is a 49mm so will keep the possibility of vignetting in mind when using with the D7.
 
I set the ISO to 400 using a Hoya R72 filter, and have no problems hand holding the camera at shutter speeds on the order of 1/30 to 1/60 sec. I stay in colour mode, and grayscale them later.

Dan
Bryan Biggers said:
bnewman said:
I have a Hoya R72 coming my way and will try it with the D7 when
the D7 arrives. Are there any specific guidelines or settings you
would suggest?

Thanks in advance.
Click to expand...
You will be able to take some nice IR shots with that. You don't
really need any pointers, but here are a couple of thoughts.
  • You will need a tripod, the exposures in sunlight will be too
long to hand hold about 1/8 to 1 second.
  • If you got a 49mm filter, there might be vignetting so you might
not be able to use less than 50mm focal length.
  • The scene is bright enough with the light amplification in the D7
EVF that you can see just fine through the filter.
  • Just put the camera in P mode and shoot away! Autofocus seems to
work fine in IR.
Bryan
Click to expand...
 
Would this also work with the Dimage 5 or would the fact that the viewfinder does not amplify lighting prevent us from seeing anything or even focusing?

thanks
 
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