infrared filter
Posted 13/08/2009 - 19:09
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Don't know about anyone else but I would like to see some of these infrared images that we're talking about,
Posted 13/08/2009 - 19:21
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grahamwalton wrote:
Just to quickly try the K20D with infrared; today in sunlight I found that, ISO 800 and 2secs @ f8 achieved a reasonable image. These are a lot longer exposures than on the Pentax istDL2.
The filter was changed on the K10D (and presumably all subsequent DSLRs), and it's a much stronger one than on the *istD series.Just to quickly try the K20D with infrared; today in sunlight I found that, ISO 800 and 2secs @ f8 achieved a reasonable image. These are a lot longer exposures than on the Pentax istDL2.
Jack, here's one I took with my *istD a few years back. Keep meaning to try it again, but never seem to get round to it. Ammonyte did some nice ones at Burnham Beeches, I seem to recall.

Dan
K-3, a macro lens and a DA*300mm...
Posted 13/08/2009 - 20:03
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Thanks Dan, that seems a lot stronger filter than the K20 has, I'm not really into this but it does have a nice effect, something different for a change,
regards,
Jack.
regards,
Jack.
Posted 14/08/2009 - 09:56
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Hi again, have not been able to try out my camera using the filter again as, never guess, well of course, its raining again, so will have to hope that I get a good day during this month.August though is usually a raining month here. I would however like to see some photo's taking from anyone who has had a IR filter, just to see what it turns out like. I really love to have a go without the cost of buying a camera with it already on. I so like the effect, and it would be a great way of taking photo's when the weather is blue and beautifully white clouds. I did one on the computer but I don't know how to put it on here.
Posted 14/08/2009 - 09:57
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grahamwalton wrote:
Just to quickly try the K20D with infrared; today in sunlight I found that, ISO 800 and 2secs @ f8 achieved a reasonable image. These are a lot longer exposures than on the Pentax istDL2.
Will try that as soon as I get a good day.Just to quickly try the K20D with infrared; today in sunlight I found that, ISO 800 and 2secs @ f8 achieved a reasonable image. These are a lot longer exposures than on the Pentax istDL2.
regards
Posted 14/08/2009 - 09:59
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Conky wrote:
My attempts at this involved 20 or 30 second exposures with apertures in the f5.6-9.5 range (and 100 ISO). As the guys on here pointed out, it's an uphill struggle given the effectiveness of the sensors' IR filtration. It's worth a try though and I'll have another go if the sun ever comes out again.
Like me, need to wait until sun comes out again.
My attempts at this involved 20 or 30 second exposures with apertures in the f5.6-9.5 range (and 100 ISO). As the guys on here pointed out, it's an uphill struggle given the effectiveness of the sensors' IR filtration. It's worth a try though and I'll have another go if the sun ever comes out again.
Posted 14/08/2009 - 21:28 - Helpful Comment
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This one was done with the K10D and a cokin infrared filter so it is possible.

Full version with metadata link
Shutter Speed: 1 second
F Number: F/5.6
Focal Length: 18 mm
ISO Speed: 400
This is not the standard black and white infrared but it really is a infrared photo and made it into a duotone photo. Since you only use the red pixels you lose 1/4th of the resolution

Full version with metadata link
Shutter Speed: 1 second
F Number: F/5.6
Focal Length: 18 mm
ISO Speed: 400
This is not the standard black and white infrared but it really is a infrared photo and made it into a duotone photo. Since you only use the red pixels you lose 1/4th of the resolution
Posted 14/08/2009 - 21:33
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Anvh wrote:
This one was done with the K10D and a cokin infrared filter so it is possible.

Full version with metadata link
Shutter Speed: 1 second
F Number: F/5.6
Focal Length: 18 mm
ISO Speed: 400
This is not the standard black and white infrared but it really is a infrared photo and made it into a duotone photo. Since you only use the red pixels you lose 1/4th of the resolution
All I can say is Wow, and hurry up sunshine weather so I can try it out again. Thanks for showing it.
This one was done with the K10D and a cokin infrared filter so it is possible.

Full version with metadata link
Shutter Speed: 1 second
F Number: F/5.6
Focal Length: 18 mm
ISO Speed: 400
This is not the standard black and white infrared but it really is a infrared photo and made it into a duotone photo. Since you only use the red pixels you lose 1/4th of the resolution
Posted 14/08/2009 - 22:19
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Posted 15/08/2009 - 07:25
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I prefer the editied one, I wondered what the round bit at the bottom was in the editied one, now I can see,perhaps if you cloned it out it would look even better. Just a though. You did right in cropping it though.
Posted 15/08/2009 - 10:54
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Prefer the edited one too but now you have an idea what you get when using an infrared filter and what you need to do.
About cloning out the lens flare, I've thought about that but most don't find it distracting and you will always see that you cloned it out. Some things are better left alone.
About cloning out the lens flare, I've thought about that but most don't find it distracting and you will always see that you cloned it out. Some things are better left alone.
Posted 15/08/2009 - 23:35
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Apologies to those who saw this feeble effort in the Your Photos section some weeks ago, but it's probably slightly relevant...
[IMG]http://i670.photobucket.com/albums/vv67/alasdairdouglas/irmonopb.jpg[/IMG]
...was actually the best I've managed with the K10D and IR filter.
The K20D may be even better/worse in IR terms.
[IMG]http://i670.photobucket.com/albums/vv67/alasdairdouglas/irmonopb.jpg[/IMG]
...was actually the best I've managed with the K10D and IR filter.
The K20D may be even better/worse in IR terms.
In use: K7 & M35/2.8, FA50/1.4, M200/4, M100/4 Macro, DA 16-45/4, DA* 50-135/2.8, DA-L 55-300/4-5.8
Non-Pentax: Sigma 24/2.8
Gathering dust: K10D, K1000, MX, ME Super
Non-Pentax: Sigma 24/2.8
Gathering dust: K10D, K1000, MX, ME Super
Posted 16/08/2009 - 08:37
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Thanks Conky, Still not been able to take any photo's with IR filter as the weather was stormy yesterday and today still raining.
regards
regards
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477 posts
24 years
Birmingham UK
Graham