Author Topic: Questions and Answers on IR  (Read 85040 times)

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Offline Rob aka [minolta mad]

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Re: Questions and Answers on IR
« Reply #15 on: August 20, 2008, 09:07:35 PM »
I have taken CWB settings off all sorts of things, as some give really great results.
Generally you take a reading of of grass, fill the whole frame and use a 25-30 sec exposure as you are doing.
With my A700 i also get the error message, but ignore this and save the CWB setting.
Your IR pics should then look something like this
As opposed to everything being reddish.


Rob [minolta mad]
« Last Edit: November 25, 2008, 10:23:06 PM by minolta mad »

Offline LillyViolet

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Re: Questions and Answers on IR
« Reply #16 on: September 13, 2008, 12:07:42 AM »
Thanks for all your help!

Offline Rob aka [minolta mad]

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Re: Questions and Answers on IR
« Reply #17 on: September 13, 2008, 09:37:43 AM »
Thanks for all your help!

No problems,
Love to see some of your IR shots ???


Rob [minolta mad]

Offline Frank [aka Wires]

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Re: Questions and Answers on IR
« Reply #18 on: September 13, 2008, 12:36:19 PM »
That's a really great shot Rob :)

I thought it was one taken on a very frosty morning and the trees all covered in hoare frost! Thanks for putting that up... and this guide! Something I may one day get round to trying :)
Frank (aka Wires)
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Offline LillyViolet

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Re: Questions and Answers on IR
« Reply #19 on: September 14, 2008, 03:46:05 AM »




I did this as a trial in my backyard. I finally took advantage of the sun since work has dominated my life for the past few weeks and I dont get home til sundown. The first pic is the original and the second pic is obviously a quick tweak in photoshop. It was windy so the pic came out blurry and I took the shot towards the end of the day hence the weird colors =/ I will update with better IR shots. haha. Im hoping that sooner than expected Ill be taking IR with better foliage and in a nature environment. =)

« Last Edit: September 14, 2008, 05:45:30 AM by LillyViolet »

Offline asildroca

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Re: Questions and Answers on IR
« Reply #20 on: November 25, 2008, 09:16:04 PM »
In your tutorial you said that although you hadn't used the A100 for IR you knew it was possible.  However, a few weeks ago as I was on another site it described testing for IR sensitivity in the same way that you did, but mine didn't work.  Granted, I didn't take the photo, just looked through the lens, but couldn't see the light.  I also tried my husband's point-and-shoot Fuji and it did show IR sensitivity, so does the A100 not have IR capabilities, is it the lens I had on (the kit lens), or is it because I didn't take the shot?

I could wait 45 minutes until I go home (I'm at work), but I'm impatient and will probably forget.  :)
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Offline Rob aka [minolta mad]

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Re: Questions and Answers on IR
« Reply #21 on: November 25, 2008, 09:36:56 PM »
Hi there asildroca,
You wont actually see the light when looking through the viewfinder. You are right that you will actually have to take the picture.

I assume that the point and shoot has a liveview ??? as with liveview you can see instantly whether or not the camera is IR sensitive or not.

I found the kit lens on the Minolta Dynax 5D and 7D did produce hotspots, i dont know whether it will  on the A100 or not.
Either way let me know and i can add it to the tutorial for the benefit of others.


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Offline asildroca

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Re: Questions and Answers on IR
« Reply #22 on: November 25, 2008, 09:56:54 PM »
Well I am SO glad that I came across your IR tutorial, because I thought I'd have to steal the hubby's camera!  Now to find a good, cheap IR filter...

BTW, if anyone does have a point-and-shoot they'd like to use for IR, I found a cool site that gives instructions on how to make your own IR "lens filter", and it's super cheap:

http://www.instructables.com/id/Take-Infrared-Pictures-With-Your-Digital-Camera/
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Offline Rob aka [minolta mad]

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Re: Questions and Answers on IR
« Reply #23 on: November 25, 2008, 10:16:32 PM »
Glad the tutorial was of use.
Try the Hoya R72 filters, have found these to be the best quality for the cheapest price, otherwise have a look at the Kood ones.


Rob [minolta mad]


p.s thanks for the link
« Last Edit: November 25, 2008, 10:22:07 PM by minolta mad »

Offline Numpty

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Re: Questions and Answers on IR
« Reply #24 on: November 30, 2008, 06:06:41 PM »
Tha A300 is sensitive to IR light if you want to add it to the list.
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Offline Rob aka [minolta mad]

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Re: Questions and Answers on IR
« Reply #25 on: November 30, 2008, 06:07:25 PM »
Thanks Numpty, will do.


Rob [minolta mad]

Offline groovyone

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Re: Questions and Answers on IR
« Reply #26 on: February 19, 2009, 05:04:20 PM »
Has anyone found someone who will do IR only modifications to Sony SLRs?  I really enjoyed IR with my A700, and haven't had much of a chance to use it on my A900, but I would LOVE a modded A300 to have in my bag.

Offline Rob aka [minolta mad]

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Re: Questions and Answers on IR
« Reply #27 on: February 19, 2009, 05:40:49 PM »
Hi there grooveyone,
As of yet i havent found anyone that will modify Minolta or Sony DSLR's.
They will do some of the P&S camera's, but not DSLR's as far as im aware.
Hopefully as Sony becomes more popular some companies may start doing it.


Rob

Offline groovyone

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Re: Questions and Answers on IR
« Reply #28 on: February 19, 2009, 05:58:43 PM »
maxmax.com has a model request area, so I keep submitting the Alphas.  No luck yet.

Offline groovyone

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Re: Questions and Answers on IR
« Reply #29 on: February 24, 2009, 04:15:46 PM »
Since IR filters throw off your focus a little, do you focus slightly behind or in front of your intended target to compensate?

I have an STF on its way and just ordered a 72-77mm ring do I can try my 77mm Hoya R72 filter on it.  Should be interesting.