infrared filter

grahamwalton
Posted 13/08/2009 - 19:00 Link
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.
Friendly Regards
Graham
jackitec
Posted 13/08/2009 - 19:09 Link
Don't know about anyone else but I would like to see some of these infrared images that we're talking about,
Daniel Bridge
Posted 13/08/2009 - 19:21 Link
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.

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.

Comment Image


Dan
K-3, a macro lens and a DA*300mm...
jackitec
Posted 13/08/2009 - 20:03 Link
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.
abesad
Posted 14/08/2009 - 09:56 Link
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.
abesad
Posted 14/08/2009 - 09:57 Link
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.
regards
abesad
Posted 14/08/2009 - 09:59 Link
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.
Anvh
Posted 14/08/2009 - 21:28 - Helpful Comment Link
This one was done with the K10D and a cokin infrared filter so it is possible.
Comment Image

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
Stefan
Comment Image

K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Edited by Anvh: 14/08/2009 - 21:28
abesad
Posted 14/08/2009 - 21:33 Link
Anvh wrote:
This one was done with the K10D and a cokin infrared filter so it is possible.
Comment Image

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.
Anvh
Posted 14/08/2009 - 22:19 Link
Thank you Susan, it's my only infrared photo that I like.
It's really hard to do a proper infrared with the K10D.
Here is the original photo BTW
Comment Image
Stefan
Comment Image

K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
abesad
Posted 15/08/2009 - 07:25 Link
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.
Edited by abesad: 15/08/2009 - 07:26
Anvh
Posted 15/08/2009 - 10:54 Link
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.
Stefan
Comment Image

K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Conky
Posted 15/08/2009 - 23:35 Link
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.
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
abesad
Posted 16/08/2009 - 08:37 Link
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

Add Comment

To leave a comment - Log in to Pentax User or create a new account.



Proudly supporting Pentax User

Samsung Logo Asahi Pentax Logo