Author Topic: Questions and Answers on IR  (Read 85041 times)

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Offline groovyone

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Re: Questions and Answers on IR
« Reply #45 on: June 02, 2009, 02:52:00 PM »
It was the 16-35Z.  It was hard for me to tell if there is a hotspot or if it was due to the wind blowing that tree around a bit.  I'll have to try it again when I get the camera back.

I fixed the post to knock it down to 4.  =)

Offline groovyone

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Re: Questions and Answers on IR
« Reply #46 on: June 09, 2009, 10:58:20 PM »
My IR modified A100 has returned!  I am uploading photos now, straight out of camera and batch processed.  They need some editing, but that is more my fault for incorrect exposure.  I'll post some when they are uploaded.

Okay, lets try posting some of the decent ones.  Bear in mind these are all unedited, straight from camera with custom WB.  All were Aperature Priority with some tinkering with +ev steps.  Once I get a better feel for it I think I'll be switching to manual.  The histogram is your friend!

*reduced image size

Sony A100 : Min 28-75 @ 30mm : f/4 : 1/500s : ISO 100


Sony A100 : Min 28-75 @ 28mm : f/9 : 1/60s : ISO 100


AF Test for 16-35mm (focussed on left petals)
Sony A100 : 16-35Z @ 35mm : f/2.8 : 1/640s : ISO 100


Sony A100 : 24-70Z @ 70mm : f/7.1 : 1/125s : ISO 100

« Last Edit: June 11, 2009, 04:15:00 PM by groovyone »

Offline groovyone

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Re: Questions and Answers on IR
« Reply #47 on: June 09, 2009, 11:15:25 PM »
A few test shots with the 135Z and 16mm fisheye:

*REDUCED IMAGE SIZE

AF Test for 135Z (yes, that is 1/3200s IR exposure)
Sony A100 : 135Z @ 135mm : f/2.8 : 1/3200s : ISO 100


AF Test for 16 fisheye
Sony A100 : 16mm fish @ 16mm : f/2.8 : 1/2500s : ISO 100

« Last Edit: June 10, 2009, 02:00:42 PM by groovyone »

Offline groovyone

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Re: Questions and Answers on IR
« Reply #48 on: June 10, 2009, 03:12:40 AM »
I did some quick a dirty IDC editing.  I really need to work on my photoshop editing I think to get the right pop to them IR photos.  I am going to try the before on the left and after on the right...

Sony A100 : Min 28-75 @ 28mm : f/9 : 1/60s : ISO 100


Sony A100 : 24-70Z @ 70mm : f/7.1 : 1/125s : ISO 100


I liked the edited B&W version of this one better than the color one.

« Last Edit: June 10, 2009, 02:01:50 PM by groovyone »

Offline groovyone

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Re: Questions and Answers on IR
« Reply #49 on: June 10, 2009, 03:13:01 AM »
AF Test for 135Z (yes, that is 1/3200s IR exposure)
Sony A100 : 135Z @ 135mm : f/2.8 : 1/3200s : ISO 100


AF Test for 16 fisheye
Sony A100 : 16mm fish @ 16mm : f/2.8 : 1/2500s : ISO 100


Offline Rob aka [minolta mad]

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Re: Questions and Answers on IR
« Reply #50 on: June 10, 2009, 04:35:03 PM »
Seems to work well, and with all lenses.
But then after being converted it should do.
Seems strange not seeing them red, straight out of camera though.


Rob

Offline groovyone

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Re: Questions and Answers on IR
« Reply #51 on: June 10, 2009, 04:58:46 PM »
Seems to work well, and with all lenses.
But then after being converted it should do.
Seems strange not seeing them red, straight out of camera though.


Rob

Custom WB of 2800K G9

Offline groovyone

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Re: Questions and Answers on IR
« Reply #52 on: June 11, 2009, 04:13:22 PM »
Seems to work well, and with all lenses.
But then after being converted it should do.
Seems strange not seeing them red, straight out of camera though.


Rob

Daylight WB:

Offline pointblank

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Re: Questions and Answers on IR
« Reply #53 on: June 15, 2009, 04:07:14 PM »
Really groovy indeed. As I ordered the mighty A700 I was thinking of using my 5D for IR. Preferably I would like a conversion but it seems hard to find a place to get this done. While getting the R72 filter I think of using the CZ16-35 as I was mainly thinking of landscapes. I'm a bit sceptical though in thinking that the lens might not be suitable. Any ideas?

Offline Rob aka [minolta mad]

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Re: Questions and Answers on IR
« Reply #54 on: June 15, 2009, 04:29:54 PM »
If you get the camera converted any lens will work and give no problems.
If you use the R72 filter its down to trial and error as to whether they will cause hotspsots. I havent heard of anyone using the CZ16-35 so cant help you. Though traditionally ultra wide angle lenses are not normally the best for IR.


Rob

Offline groovyone

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Re: Questions and Answers on IR
« Reply #55 on: June 15, 2009, 08:30:28 PM »
My 16-35 works great on the modded A100, but does look like it may have shown a little sign of a hotspot when it was unmodified.

I used the 16-80Z on my A700 with thr R72 and LOVED it.

Offline pointblank

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Re: Questions and Answers on IR
« Reply #56 on: June 16, 2009, 09:34:21 AM »
Noted Rob, I need to find a place to do the modification I guess. I don't mind the trial and error but expect the R72 to be not so cheap fitting a 77(?)mm which the CZ16-35 is. Facing unpleasant results in that case would instantly make me want to sell off the filter and obviously it will cost me a few dollars.

Offline groovyone

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Re: Questions and Answers on IR
« Reply #57 on: June 16, 2009, 10:02:21 PM »
My A100 was modifed by Precision Camera.  They did an awesome job.  Total cost to me was $264.99 which included shipping.  I sent it to them on a Monday, USPS Express, and I had it back in hand the next Tuesday!

I'll post the contact info here.


 Mark Soares (MSoares at precisioncamera.com)

Send Mark and email requesting the required form for an IR conversion and tell him Keith (aka groovyone) sent ya!  (No, I do not get a referral)  They did a great job with mine and Mark answered many annoying emails from me.  I am very, very happy with the results, service and cost!  The cost was $249 + S&H for APS-C and $299 + S&H for full frame.  They do any brand (as far as I know) and since they are a major repair center, and one of Sony's warrenty repair centers, they have all the correct factory tooling to do the job.
« Last Edit: June 16, 2009, 10:06:40 PM by groovyone »

Offline pointblank

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Re: Questions and Answers on IR
« Reply #58 on: June 17, 2009, 05:15:02 AM »
Thanks for the info. I have visited their website and they are very elaborate on the service. I have sent Mark and email and now let's just wait and see.

Offline J.

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Re: Questions and Answers on IR
« Reply #59 on: June 25, 2009, 02:49:15 PM »
Standard A700 + R72 on 16-80Z:
ISO 200, 30 Sec, f/5.6


Edited in IDC:


Hello.
I have the A350, and when I tried IR photos, I get the same red pictures, and I don't know how to edited pictures to have a better results, like yours.
How you doing?

(So sorry, I don't speak English very well)